US2516874A - Sewing machine take-up - Google Patents

Sewing machine take-up Download PDF

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Publication number: US2516874A
Authority: US; United States
Prior art keywords: thread; take; finger; head; cover
Prior art date: 1945-11-23
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Expired - Lifetime

Application number

US630288A

Inventor

Glen A Holland

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Yale and Towne Manufacturing Co

Original Assignee

Yale and Towne Manufacturing Co

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1945-11-23

Filing date

1945-11-23

Publication date

1950-08-01

1945-11-23 Application filed by Yale and Towne Manufacturing Co filed Critical Yale and Towne Manufacturing Co

1945-11-23 Priority to US630288A priority Critical patent/US2516874A/en

1950-08-01 Application granted granted Critical

1950-08-01 Publication of US2516874A publication Critical patent/US2516874A/en

1967-08-01 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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Classifications

- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B49/00—Take-up devices, e.g. levers, for the needle thread
- D05B49/04—Take-up devices, e.g. levers, for the needle thread rotary

Definitions

such prior art mechanisms do ⁇ notallcw for the properoperatonhof the H take-up mechanism yrelatively to the tension means for determining the tensiomof the stitch.
a feature of myinventionll4 contributeva rotary' take-up i. mechanism v that is: particularly adapted for ready cooperation.withA ⁇ a thread placed across its pathtof movements ⁇
my take-up mechanism ⁇ isfreadily adaptable for use in a machine of thevtype; which the thread ismoved preferablykinasingl plane fromwthe ⁇ spool to the needle, andvwithout any manipulation relatively ⁇ t0 auxiliary.. ⁇ guide means such ⁇ as is requiredngenerallyl in the ⁇ .prier art.A i
thestakeup mechanism is adapted .to be self-strippingfso that its mere movementfwith the ⁇ thread isi effec#- tive to move the thread offthe take-up at a par'- ticular point of the travelof the take-up.
thethread isstripped therefrom at ⁇ the completion of' the-take-up stroke.
the take-up has au portionl thereof adapted to impart ⁇ that ⁇ slight additionalilpressure to thethread as thethread leaves -tlietalreup, whereby to move thefthread ⁇ relatively to ⁇ the tension means to contribute a; tight stitch. as de.; termined bythetension means.
a further feature of the invention resides in the particularrelation ⁇ of ⁇ the:rotary take-up member to guide means ⁇ for so. hold:- ing and'. guiding the ⁇ thread that once the thread leaveswthe take-upin aplortion of one take-up cycle, ⁇ the said thread will notbe accessible: tn the take-upmember until the verybeginning of the i nexttalre-up c-yclel Still a. further i lea;- ture of the guide means is. the arrangement there# of so that thef thread. is" held in thenpath ota take-up .-iinger;V to be engaged# thereby upenn-rotation.
Still al 4further feature ⁇ of ⁇ the invention resides in the utilization oi azover ⁇ member for the head of the sewing machine, the cover member having guide means for the thread mounted thereon and adapted to move into particular guiding relation to the thread when the cover is applied in position.
the said guide means on the cover are adapted to form an effective barrier between the take-up finger andthe thread, all as will presently appear.
the cover is adapted to lie in covering relation not only to the head, but to a portion of the arm of the sewing machine, of which the head is a the head of the machine to the needle so that none Aof the working parts or the thread are exposed.
a tension member is mounted under the cover and has a portion thereof exposed through an opening in the cover so that it may be readily adjusted.
Fig. 1 is a side elevation .of my machine, while Fig. 2 is an end elevation thereof.
Fig. 3 is a View looking downwardly on a part of the mechanism mounted in a Awell of the arm oi the sewing machine and illustrating particularly certain of the parts shown in dotted lines in Fig. 1.
Fig. 4 is a view similar to Fig. 1, but showing the cover in its -upper position and with certain of the parts of the machine moved into position for manipulation.
Fig. 5 is a perspective view looking at the back ofthe head covering portion of the cover. f
Fig. 6 is a section taken along the line 8 3 of Fig ⁇ 7.
Fig. 7 is a section taken along the line 'I-1 of Fig. l.
Figs. 8,9, 10, and 11 are views similar to Fig. 7, but showing the relationship of the take-up mechanism to the hook in certain positions of the take-up mechanism.
Fig. 12 is a vertical section takensubstantially along the line I2-I2 of Fig. 10.
Fig. 13 is a section taken along line I3-I3 of Fig. 12.
f2() are views illustrating the relation of the thread I to the take-up mechanism in different positions of that take-up mechanism.
Figs. 1, 5, 17, 19, and 21 are side views of Figs. 14, 16, 18, and 20, respectively.
my sewing machine comprises a base member IU that is formed integrally with an upper arm II carrying what I term a. head I2 formed as a part thereof.
the base of the machine is formed so that a rubber pad I3 may be secured thereto for the purpose of holding the machine against slippage on a smooth surface and for dampening vibrations.
a suitable electric motor I4 that drives a conventional hook I5, the motor being effective through a pulley I6 and a belt II to drive an upper shaft I8 at a speed one-half the speed of the hook I5.
a hand Wheel I9 that conforms to the general shape of the machine is secured to the shaft I8 for imparting rotation thereto when desired.
I For covering the head I2 and the forward portion of the arm II, I utilize a cover member designated by the letter C and pivoted on a shaft 2li relatively to the arm II.
the cover C has a. part 2l that is adapted to cover the head I2 and a part 22 adapted to cover a well formed in the arm II of the machine. In the position of the cover C in Fig. 4, both the well of the machine and the head I2 are exposed.
FIG. 12 there is shown a forward bearing 23 for the upper shaft I8, the rear end of the said shaft being supported by a bearing 24 as best seen in Fig. l.
a disc 25 is preferably formed as an integral part of the shaft I8 and carries an eccentric stud 28 about which is mounted the crank 21.
This crank 2l extends downwardly and terminates in a pin 28 that is in driving relation to an arm 29 that is formed as an integral part of the needle bar 30 of my machine.
This needle bar is suitably guided by a sleeve bearing 3
the take-up disc 38 is thus adapted to be rotated at the same speed as shaft I8, or one revolution for each reciprocation of the needle bar 30 and each two revolutions of the hook I5, all for a purpose that will be understood by the experts in this art.
a circular groove 4I is formed in the take-up disc 38, the section of this groove being probably best shown in Figs. 12 and 1 3. The function of this groove will be described presently.
Secured cn the4 take-up disc 33 is what I- term a take-up finger designated generally by reference numeral 12.
This take-up finger is well illustrated in the drawings and especially in such Figures as 6, 7, and 14 to 21.
the take-up finger 42 has a main domed part bearing reference numeral 43, and extending rearwardly from the domed part is a camming or stripping member dll. Extending forwardly from the domed main part of the finger 43 is an arm 45. The functioning of the parts of the finger will appear presently.
the part 22.0f the cover C is formed withal;
the pressure of the spring 52 is, ofl course, adiustedbyrotation of the adjusting wheel ⁇ 4I, thetsaid wheel'being threaded on-a portion of the shaft449 ⁇ for axial movement thereon, and the spring beingritself mounted-about the-shaft 49;
the amountof spring pressure willldeterminethe tension ⁇ applied to the threadiT that passes between .plates 50, 5I as probablybest seen in ThefthreadT is Wound about a spool 53 that is appliedV to a supporting pin 513 extending from al bracket 55thatis pivoted on a shaft 56 in turn supported by a ⁇ bracket 51 secured within the wellfof thearm II of the machine.
⁇ It will be understood that the spool 53 is applied to the pin-l'when the bracket-55 is moved out of the welll-to its position of Figi 4. Thereafter, the bracket maybe rotated on theshaft 5t to its position shown in dotted lines in Fig. l andwithin the-well of the arm Il. ⁇
a suitable guide plate l is formed as an integral part of the bracket 55 andis adapted to guide the thread T ⁇ from the spool ⁇ -53 so that it willbe centered relatively to the-head of the-machine and may be readily applied between the two bent plates 50, 5I of theispring tension mechanism S.
a downwardly extending guide plate Ilithatlspreferably grooved at El! to hold the thread T in guided relation thereto. It will be noted esn pecially from Figs. 4 and 12 ⁇ that a ⁇ thread moved longitudinally cf the machine from the spool 53 and then dropped vertically downwardly along the plate 59 ⁇ will lie outwardly ofthe take-up disc andtthe ⁇ take-up linger l2 so that the Aringer may rotate relatively to the thread without con tacting it.
the extreme lower periphery of therwall BI is formed with a slot 63 leading to a bores G4 ⁇ .through which the thread T is adapted to'tpass. ⁇
the surface 52 below wall 5I extends intera guide shelf 65, and carries also a guide sprlngw.- ⁇ Holding springs 61 are also secured to-the-.cover C for the purposeof holding ⁇ it yleldingly in ⁇ ccwering relation to -thehead I2 of the: machine.
a finger piece 68 ⁇ formedftaspaft of cover C is adapted for the"applicationof ⁇ the fingersto move thecover. ⁇ from covering. ⁇ position to its position of4 Fig. 4..
the guide wall 6I is adapted, when the cover is in its position of Figs. 1, 12 ⁇ and 13 tollie within the groove 4I of the take-up disc 38. It will be seen from the gures referred to that the wall 4Ia ofthe groove 4I will cooperate with thewall 6I to present a barrier against the. movementof the ⁇ thread T out ofthe guide bore 64 ⁇ and slot 63 vvithinA the wall 6I. Moreover, with the thread merely positioned within the groovet of ⁇ the plate ⁇ 59 and extending freely downwardly toward the needle N carried by the needle ⁇ bar ⁇ 3Uas best seen in Fig. 7, the movement of the'cover into covering position will bring the slot 63 of wallSI in encompassing ⁇ relation to the thread T.
the take-up mechanism is, of course, cooperable with a hook I5 within ⁇ which is mounted a bcbbin B for furnishing the-thread that forms lock stitches with the thread T. It is, ofcourse, the function of the hook to engage and take up the thread from the take-up mechanism after it is stripped therefrom, and it isthe functionof the take-up mechanism to take-up the 'thread thereafter from the hook I5 so as to form, a stitch under the control ⁇ of the spring tension devices.
a presser foot P is usedl as part of the machine and is controlled by a lever 12in a manner ⁇ vvlriich those skilled in the art will fully appreciate.
the spool may be ⁇ movediwith the bracketinto the dotted line position of Fig; l.
the thread is passed into the slot 58a ⁇ of the-guide member 58 and then longitudinallyfand centrally oiithe ma 7 chine between the spring tension plates 50, 5
the adjustmentof the spring tension mechanism is made by wheel 4l, the said wheel being availablefor manipulation when the cover is in its position of Fig. 1l or in its position of Fig. 4.
the thread is moved downwardly in the groove GG of the guide plate 59 and into the hole of the needle N.
the thread v will now be in the vertical alignment shown in Fig. 7,but not in the particular relation fto the take-up finger .42 that is there illustrated.
the cover Cis now swung downwardly into place until its springs 51 yieldingly secure it in the position of Fig. 12.
the wall 6l will now be within the groove 4l of the take-up disc 38 and the Islot 63 will have encompassed the thread T with the thread moving into the vertical bore 64.
the shelf B5 will overlie the slot l0 in the guide bracket 69 so as to maintain the thread within the slot 1B. .Flat spring 66 will press the thread yieldingly into the position-illustrated in Fig. 12.
the take-up finger 42 begins a take-up cycleby bringing its arm 45 into overlying relation to the thread T. This is also approximately the relation of the parts in Fig. 6.
the surface 43a of the domed portion 43 of the take-up detent 42 will next contact the thread T and upon further rotation of the nger will move the threadto the position of Fig. 8 from the position of Figs. 6 and '7. It will be noted that the hook is now giving up its thread to the take-up ringer. take-up finger from the position of Fig. 8 will bring it into the position of Figs.
Figs. 16 and 17 The next position of the take-up finger 42 relatively to the thread is illustrated in Figs. 16 and 17. There, while the rotation from Figs. 14 and 15 has been very slight, the surface 44 has neverthe less contributed considerable stripping movement to the thread T and the thread is almost ready to leave the domed portion 43 to be engaged by the arm 45. Of course, in this position of the parts, the hook I5 is still giving up its thread for forming a lock stitch. From the position of Figs. 16 and 17, the take-up finger moves to the position of Figs. 18 and 19. In that position the finger is rotated but a slight degree from its position of Fig. 416, but the thread is now moving rapidly olf the domed member 43. This movement is so rapid that one side of the thread T is shown in Fig. 18 by a solid line and also by a dotted line to denote swift movement, the last position of the thread being shown by the dotted line.
a take-up mechanism comprising a rotating take-up iinger rotatably mounted on said sewing head, means guiding a thread Iso that it extends across the rotary path'of-said' take-up linger to be taken up by said linger, said guide means being open outwardly and transversely of the path of alignment of said thread by said guide means to allow outwardv transverse removal and 'replacement of said thread relai tively to said guide'l means, a self-stripping surface formed as 'a part of said take-up'iinger for contacting the thread upon rotation of said finger and for stripping the thread completely offf'said iinger'as s'adfing'er rotates whereby to leavesyaid lthread in a slack condition and means 1whereby the slack ofsaid thread is ⁇ then taken up and said ⁇ thread is moved freely of ⁇ said finger into
a take-up mechanism ⁇ comprising a ,rotating ytake-up ngermounted for rotation on a horiu Zonta-l axis, means guiding a ⁇ thread so that it Aextends substantially diametrically across the -rotary path of said take-up finger to Vbe taken up by said iinger, said linger contacting said thread when said finger reaches its lowermost position ⁇ relatively ⁇ to said axis and havingargenM erally tapering thread contacting surface that is self-stripping as said ⁇ linger rotates towardits .uppermost position relatively Vto said ⁇ axis ⁇ and .exerts takeup pullwon said thread, whereby said ⁇ thread strips oli said finger as said ⁇ finger moves .to substantially said uppermost and full take-up position and leaves said ⁇ nger as it ,passes rthrough full Atalreup position, and ,
a rotary take-up finger a rotary bobbin hook, means mounting said nger and hook for rota ⁇ tion on parallel horizontal axes vertically spaced with said take-up finger above said bobbin hook, a needle bar carrying a needle kat its lower end, means mounting said needle bar for vertical reciprocation, a tension member positioned vertically above said take-up finger, thread guiding means for guiding said thread so that when it is substantially fully accepted by said bobbin hook and about to be contacted by said finger take-up it will extend from said tension membersubstari tially diametrically across the circular path of said take-up nger and toward the needle in substantially a single plane, said guide means open ⁇ outwardly and transversely of the path ofalignment of said thread bysaid guide ⁇ means to allow outward transverse removal and replacement .of said ⁇ thread relatively to said guide means, ⁇ said finger having a generally tapering thread conl rtacting
4a vtake-up mechanism comprising a rotating ⁇ take-up finger, means guiding athread so that -it extends across the ⁇ rotary path of said take-up dinger to he taken up by said finger, said finger 'having a selfstripping surfaceland also ⁇ a.
a .take-up mechanism comprising a rotating taireup finger, said finger ⁇ having a surface that first :contacts -the thread moving it in a ⁇ take-up dirrection ⁇ as the finger rotates, the continued rota tion of said nger ⁇ moving a tapering land ⁇ cam ⁇ ming surface of said finger ⁇ against lsaid thread so rthatthe continued pull on the thread incidental to the take-up thereof will tend to strip said thread from said finger because of the action of s-aid Atapering ,and camming surface o-n said thread, the rotation of said linger through its take-up position acting to fully strip said thread therefrom, and said tapering and ⁇ cammingrsurfface being formed so that the total rotation .of
a take-up mechanism means for rotating ⁇ said Atake-up mechanism, means guiding athreadjso that it ⁇ extends ⁇ across the rotary Apath of said take-,up mechanism to be taken up thereby, said take-up mechanism having a iirst surface Ythat rstcontacts the thread ,to rnove it in a takeup direction, ⁇ said take-up mechanism having :a ⁇ sec- .ond surface that is tapered in.
a take-up mechanism comprising a rotatingtakef- ⁇ up finger, means ⁇ guiding a thread ⁇ so that itextends across the .rotary path ofsaid finger to be taken up thereby, said fingerhaving a surface that first contacts the thread ⁇ moving it in a takerotation of said linger moving a tapering and camming surface thereof against said thread so thatthe continued pull on the thread incidental to the take-up thereof will tend to strip said Ithread from said finger because of the action of said tapering and camming surface on said thread, a self-stripping retaining arm on said finger extending in the direction of its rotation, the continued rotation of said finger to its takeup position acting to pull the thread off said iinM ger surface and onto said retaining armuntil said take-up nger reaches full take-up position, further rotation of said finger and its retaining arm pulling said thread off the end of said arm in 'the direction of rotation of said finger and arm.
a take-up mechanism means for rotating said take-up mechanism, means guiding a thread so that it extends across the rotary path of said take-up mechanism to be taken up thereby, said take-up mechanism having a rst surface that first contacts the thread to move it in a take-up direction, said take-up mechanism having a second surface that is tapered in -a direction to cam vthe thread off said rst surface as said second surface rotates, the said second surface contacting the thread only after some rotation of said take-up mechanism has taken up some Vof said thread through action of said first surface, a selfstripping retaining arm formed as part of said take-up mechanism extending in the direction of its rotation, the continued rotation of said takeup mechanism to its take-up position acting thro-ugh said second surface to pull the thread off said rst two surfaces and onto said retaining prising a rotary take-up finger, means for rotating said take-up mechanism on said sewing head o n
a sewing head a rotary take-up finger, a rotary bobbin hook, means mounting said ringer and hook for rotation on parallel horizontal axes vertically spaced with said take-up finger on said sewing head and above said bobbin hook, a needle bar carrying a needle at its lower end, means 12 mounting said needle bar for vertical reciprocation, a tension member positioned vertically above said take-up nger, thread guiding means for guiding said thread so that when it is substantially fully accepted by said bobbin hook and about to be contacted by said take-up finger it will extend from said tension member substantially diametrically across the circular path of said take-up linger and toward the needle in substantially a single plane, said guide means being open outwardly and transversely of the path of alignment of said thread by said guide means to allow outward transverse removal and replacement of said thread relatively to said guide means, said finger having a surface that rst contacts the thread moving it in a take-up direction as the finger rotates,
a rotary take-up linger in a sewing machine of the class described, a rotary take-up linger, a rotary bobbin hook, means mounting said finger and hook forrotation on parallel horizontal axes vertically spaced with said take-up iinger above said bobbin hook, a needle bar ycarrying a needle at its lower end, means mounting said needle bar for vertical reciprocation, a tension ,member positioned vertically above said take-up iinger, thread ⁇ guiding means for guiding said thread so that when it is substantially fully accepted by said bobbin hook and about to be contacted by said take-up linger it will extend from said tension member substantially diametrically across the circular path of said take-up nger and toward the needle in substantially a single plane, said take-up mechanism having a rst surface that rst contacts the thread to move it in a take-up direction, said take-up mechanism having a second surface that is tapered in a direction to cam the thread 01T said first surface, the said second surface
a head a take-up disk having take-up means thereon, means mounting said disk for rotation on said head, a cover for said head, means pivoting said cover for movement into and out of covering relation, thread guiding means on said head, a second thread guiding means on the inside of said cover movable into thread guiding position against said thread when said cover moves into covering relation to said head whereby thread is then guided between said head and cover, the thread guiding means of said cover being positioned radially immediately inwardly of the path of rotation of said take-up means on means on the inside of said cover movable into l thread guiding :positionagainst said thread when said cover moves into covering .relation to said head whereby thread is then guided between said head andoovenxthe thread guidingmeans of said cover being ⁇ positioned radially 4immediately inwardly ofthe path of rotation of said ltakeeup finger so that said take-up ringer contacts .the thread just radiallybeyond
a, rotary take-up means ⁇ means ⁇ iriounting said ⁇ rotary ⁇ take-up means for rotation on said head, a cover for said head, means pivotingsaid ⁇ cover for movement :into and :out of covering ren 1lation to said head, a irstthread fgu'idingmeans la head, a rotary take-upmeans,meansmounting saidrotary 'take-upfmeans for rotation on said ⁇ head,a cover for said head, .means pivoting said cover for movement into and 'out oflcoveringre- ⁇ lation ⁇ to said head, a rst thread 'guidingmeans on therupper portion of said head above the path of ⁇ said take-up means, ⁇ a s'econd thread guiding means on said icover movable into thread guiding ⁇ position when said ⁇ cover moves 1into covering relation to saidfhead, ⁇ said thread guiding ⁇ means on said cover being
a head Ina sewing .machine of the class described, a head, a ⁇ rotary takeeup means, means mounting said rotary ⁇ take--up means forrotationxon said head, a cover for said head, means ⁇ pivoting said .cover for movement into and out ofcovering relation to said head, a rst thread guiding .meanson saidhead, a second thread guide means 'on said cover movable into ⁇ thread guiding position when said cover ⁇ moves into covering relation to said head, saidthread guiding means on said cover being then positioned below' said Yfirst guide means and below the axis of rotation ⁇ of said ⁇ rotaryta1 :e'up ⁇ means and radially justinwardly of said take-up means, whereby said take-up means will rotate to pick Aup thread ⁇ that ⁇ has just'moved throughsaid second guidemeans, Wall ⁇ means formed for coo eration with ⁇ said 4second guidemeans ⁇ to
a head In a sewing machine of the class described, a head, a rotary take-up means, means mounting said rotary take-up means for rotation on said'head, a cover for said head, means pivoting said cover for movement into and out of covtering-relation to said head, a iirst thread guiding means on.
a second thread guiding means on said cover movable into thread guiding position when said cover moves into covering relation to said head, said thread guiding means on said cover being then positioned below said first guide means and below the axis of rotation of said rotary take-up means and radially just inwardly of said take-up means, whereby said takeup means will rotate to pick up thread that has just moved through said second guide means, and curved walls formed as extensions of said second guide means to form a barrier against movement of the thread from the inner zone defined by said curved walls into the path of movement of said take-up means, said second guide means having a slot through which passes said thread, said take-up means comprising a nger having a iirst surface that contacts the thread just below said second guide means, and a second Selb-stripping surface that later contacts the thread and cams it off said ringer into the inner zone defined by said wall 'means 23.
a take-up disk having take-up means thereon, means mounting said disk for rotation on said head, a cover for said head, means pivoting said cover for movement into and out of covering relation, thread guiding means on said head, a second thread guiding means on said cover movable into thread guiding position when 'said cover moves into covering relation to said head whereby thread is then guided between said head and cover guide means, the second thread guiding means being positioned radially immediately ⁇ inwardly of the path of rotation of said takeup means on said take-up disk so that said take-up means contacts the thread just radially beyond said guide means on the cover, curved walls formed as extensions of said second guide means to form a barrier against movement of the thread from the inner Zone defined by said curved walls into the path of movement of said take-up means, said second guide means having a slot through which passes said thread, said disk having a circular wall juxtaposed to said second guide means whereby as said disk rotates said circular wall forms a closure for the
a head a take-up mechanism comprising a rotating take-up finger, means mounting said take-up nger on said head for rotation on a horizontal axis, a rst thread guide positioned vertically above the circular path of said iinger and in a vertical plane spaced from the plane of said finger so that a thread dropped vertically will lie ,out of the path of said finger, a second guide means mounted on said machine and having a slot through which the thread is passed from vsaid rst guide, said second guide lying just above the pathcf'said finger with the thread guided thereby to lie in a vertical plane diametric of the path of said iinger and accessible to said nger just below said slot, a third guide means for said thread below the path of said linger, said nger having a generally tapering thread contacting surface that is self-stripping as said nger rotates and exerts take-up pull on said thread, whereby said thread tends to strip off said finger as said
a take-up mechanism comprising a rotating take-up linger, means mounting said takeup :finger on said head for rotation on a horizontal axis, a iirst thread guide positioned vertically above the circular path of said nger and in a vertical plane outwardly spaced from the plane of said finger so that a thread dropped vertically will lie out of the path of said nger, a second guide means mounted on said machine and having a slot through which the thread is passed from said rst guide, said second guide lying just above the path of said finger with the thread guided thereby to lie in a vertical plane diametric of the path of said finger and accessible to said finger just below said slot, a third guide means for .said thread below the path of said Lnger, said iinger having a generally tapering thread contacting surface that is self-stripping as said finger rotates and exerts take-up pull on said thread, whereby said thread tends to strip off said ringer as said
a head a take-up mechanism comprising a rotating take-up nger, means mounting said take-up linger on said head for rotation on a horizontal axis, a rst thread guide positioned vertically above the circular path of said finger and in a vertical plane spaced outwardly from the plane of said finger so that a thread dropped vertically will lie out of the path of said finger, a second guide means mounted on said machine and having a slot through which the thread is passed from said irst guide, said second guide lying just above the path of said finger with the thread guided thereby to lie in a vertical plane diametric of the path of said finger and accessible to said nger just below said slot, a third guide means for said thread below the path of said finger, said iinger having a iirst thread contacting surface and a second generally'tapering thread contacting surface that contacts the thread as said iinger rotates and strips said thread from said iinger a's it exerts take-
a head a take-up mechanism comprising a rotating take-up finger, means mounting Saidtakeup nger on said headlforrotation ⁇ on a horizontal axis, ,a rstihread guide positioned ⁇ vertically above'the circular path of said finger and in a vertical plane spaced outwardly fromthe plane of said finger "so that a thread droppedivertically therefrom will not lie in the path of said finger, apovervpivoted on said head for movementinto andgout of cover relation, a second guidemeans secured ongsaid cover and having-a slot ⁇ adapted toferlvejlopfthe thread ⁇ extending from said first guide means as said cover ismoved to covering position, said second guide means lying with its slot justabove the pathof said finger and closer tosaid ⁇ ,head than said rst ⁇ guide means ⁇ wherebyxthe ⁇ thread.
a third guide means for said thread below the path of said finger said finger having a first thread contacting surface and a second generally tapering thread contacting surface that strips the thread from said finger as said nger rotates and exerts take-up pull on said thread, and curved walls formed as extensions of said second guide means to form a barrier against movement of the thread from the inner zone dened by said curved walls into the path of movement of said take-up means except through said slot, said thread moving into said inner zone from said take-up finger as it is stripped from said finger.
a head a takeup mechanism comprising a rotating take-up finger, means mounting said takeup finger on said head for rotation on a horizontal axis, a first thread guide positioned vertically above the circular path of said finger and in a vertical plane spaced outwardly from the plane of said iinger so that a thread dropped vertically therefrom will not lie in the path of said finger, a cover pivoted on said head for movement into and out of cover relation, a second guide means secured on said cover and having a slot adapted to envelop the thread extending from said first guide means as said cover is moved to covering position, said second guide means lying with its slot just above the path of said nger and closer to said head than said first guide means whereby the thread is accessible to said rotary finger just below said slot, a third guide means for said thread below the path of said finger, said finger having a first thread contacting surface and a second generally tapering thread contacting surface that strips the thread from said nger as said finger rotates and exerts take
a head a take-up mechanism comprising a ro" ⁇ tating take-up nnger, means mounting said takeup finger on said head for rotation on a horizontal axis, a first thread guide positioned vertically above the circular path of said iingei ⁇ and in a vertical plane spaced from the plane of said iinger so that a thread dropped vertically from said guide will not lie in the path of said finger, a cover pivoted on said head for movement into and out of cover relation, a second guide means secured 18 en ,said cover and' having aslot adapted to ⁇ envelop the threadextending iromisaid iirstiguide means assaid coveris moved to covering position, said second guide ⁇ means lying with ,its slot just above the path ofsaid finger and.
a main frame having the usual horizontally extending arm terminating in a sewing head, a cover for said head, means pivoting said cover on said arm on an axis rearwardly of said head, a well in said arm between said head and said axis covered by a part of said cover, and a thread spool support in said well,
a main frame having the usual horizontally extending arm terminating in a sewing head, a cover for said head, means pivoting said cover on said arm on an axis rearwardly of said head, said cover having a head covering portion and an arm covering portion angularly related to one another so that said cover may be swung on said axis to bring both cover portions into position, that part of the arm that is covered bysaid cover having a well therein, and a thread spool support in said well.
a main frame having the usual horizontally extending arm terminating in a sewing head, a cover for said head, means pivoting said cover on said arm on an axis rearwardly of said head, said cover having a head covering portion and an arm covering portion angularly related to one another so that said cover may be swung on said axis to bring both cover portions into covering position, that part of the arm that is covered by said cover having a well therein, a thread spool support in said well ⁇ and guide means for guiding a thread from a spool on said support under said cover and toward said head.
a main frame having the usual horizontally extending arm terminating in a sewing head, a cover for said head, means pivoting said cover on said arm on an axis rearwardly of said head, a well in said arm between said head and said axis covered by a part of said cover, a thread spool support in said well, a thread guide in said well for guiding the thread, a tension member at said head to which the thread is applied, take-up means on said head tc which the thread is led from said tension member, all
said guide means lying under the cover when 19 iemetreaily of the circular path of said take'up nge'r when it is substantially fully accepted b'y s'a-d bobbin hook and said take-up linger is about to contact said thread 'to begin the take-iup stroke
'said guide means being -open outwardly and transversely of the path of alignment of 'said thread by said guide means to allow outward transverse removal 'and replacement of said thread relatively 'to said guide means
said finger having a 'generally 'tapering 'thread 'contacte ing surface that is self-stripping as seid 'finger rotates and v'exerts takeup pull on said ltnread, whereby said thread tends to 'strip off said finger es said 'finger moves to 'full take'up position and then leaves V*said finger as it Vpasses through full take-up position, 'and guide means on said cover holding seid thread

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Engineering & Computer Science (AREA)
Textile Engineering (AREA)
Sewing Machines And Sewing (AREA)

Description

Aug. l, 1950 G. A. HOLLAND SEWING MACHINE TAKE-UP 5 Sheets-Sheet 1 Filed Nov. 23, 1945 //////////llllll|ll||"Hmmm INVENTOR G, ,4. HO Ugg/74, www

ATTORNEY Aug. l, 1950 G. A. HOLLAND SEWING MACHINE 'rm-UP 5 Sheets-Sheet 2 Filed Nov. 23, 1945 INVENTOR Gt ffo///J/:

ATTORNEY Au@ l 1950 y G. A. HOLLAND 2,516,874

SEWING MACHINE TAKEUP Filed Nov. 23, -1945 Y 5 Sheets-Sheet 5 l INVENTOR g QAHo//no/ BY www@ ATTORNEY Aug. l, 1950 G. A. HOLLAND SEWING IIACHINE TAKE-UP -5 Sheets-Sheet 4 Filed Nav. 23, 1945 INVEN-ron G A f/a #and ATTQRNEY Aug. 1, 1950 G. A. HQLLAND SEWING momma TAKE-UP 5 Sheets-Sheet 5 Filed Nov. 23. 1945 IN\IENTOR G, A. Ho//ana w ATTORNEY Patented Aug. l, 1950 UNITED' STATES PATENT FFICE.`

asistenu SEWING MACHINETAKELUP p Glen A. Holland, BronxvillegN. Y.,J assigner to The Yale &. Towne Manufacturing Company, Stamford, Connw aA corporation of AConnecticut Application'Nvember 23, 1945, .Serial No. 630,288 34 cnims., (c1.` i12- 248) @,fxThis -invention relates to a. sewingmachine,

and more particularly, to a..sewing machine-.1 of thetype adapted to be. usedfin a homeland known inA the: trade as` a domesticsewing machine.

The art has long sought; a machine of` this class-1. so constructed thatit can be threaded by a simple manipulation of the thread, and without the rather complex andintricate manipulation ot `the thread `that is: necessary in present sewing` machines.` Itl is the object. of` my invention to contribute a sewing machine that is easily threaded.` l

i The arthas alsovlongsought: axdomesticsewing machinehaving `alsimple rotary take-up. Itis the object of my invention `to contribute a sewing machine. having an extremely simple. and` ef.- fective-G rotary take-up, and .more particularly, ai lrotary take-up that will allow for thettype` ci threading towhich `I `have alluded.

Inventors in thesewing machine artfha-ve for many years-attacked the problem of contributing effective rotary take-ups and# i there are:` today `numerous patents showingrotary take-up `mech-- anisms. However, these rotary take-upset the prior `art` do not lend themselves to ther type 4"of simple threading that libelievenis` essential ina domestic sewing machine.. In addition,r the ro.:- tary take-ups of the prior art `have aitendency tofentrap the thread in the event the thread is broken so as to windgreat-Aquantities of-thread about .the mechanism.` This malresit` necessary tol perform aldiilicult thread unwindinfr `and dis..- entangling` operationA each time that the thread is broken. In order to minimize the damage done, thread cutters are provided in sewing ma.-

chines of the particular class, thetthreadcutters serving to out the thread and` therebyto preventthe entanglement thereof..f Howevem thread cutters are not entirely satisfactory,-and certainly are not desirable in domestic machines..

The take-up mechanisms oi the prior artare also `relatively complex; ithaving beentfound by priorart inventors that it is generallynecessary to utilize a pair of thread manipulators `working 1in combination in order to effect proper take-up of the thread. There have been contributed rotary .take-ups in whichasingle take-up` member is fstripped of its thread at a particular pointin its travel, but these take-ups require a manipula.- tion of the thread relatively to the take-up. device by additional means that are not adjustable or 'readily adaptable to the varying operations of a' sewing machine. Moreover, such prior art mechanisms do `notallcw for the properoperatonhof the H take-up mechanism yrelatively to the tension means for determining the tensiomof the stitch.

As: a feature of myinventionll4 contributeva rotary' take-up i. mechanism v that is: particularly adapted for ready cooperation.withA `a thread placed across its pathtof movements` Through this feature my take-up mechanism` isfreadily adaptable for use in a machine of thevtype; which the thread ismoved preferablykinasingl plane fromwthe` spool to the needle, andvwithout any manipulation relatively` t0 auxiliary..` guide means such` as is requiredngenerallyl in the `.prier art.A i

As alfurther feature of myinvention, thestakeup mechanism is adapted .to be self-strippingfso that its mere movementfwith the` thread isi effec#- tive to move the thread offthe take-up at a par'- ticular point of the travelof the take-up. In other words, it is inherentin the `construction of the take-up that thethread isstripped therefrom at` the completion of' the-take-up stroke.

As a still `further feature of Athis portionlofl the invention, the take-up has au portionl thereof adapted to impart` that `slight additionalilpressure to thethread as thethread leaves -tlietalreup, whereby to move thefthread `relatively to `the tension means to contribute a; tight stitch. as de.; termined bythetension means. i

Itl is a furtherY feature ofi myl invention kthat the rotary take-up is arranged lto rotate Athrough one revolutionlwhilethehook of thesewingrm'a.- chinel `rotates through twoV revolutions, thus pre?- serving the time-honored-relation betweenlli-the take-up mechanism and `the hoch,` making` it possible for `my take-up toH cooperate with standard hooks ofthe type thathave been giving excellent resultsl for manyfyears.`

Still. a further feature of the inventiontresides in the particularrelation `of `the:rotary take-up member to guide means` for so. hold:- ing and'. guiding the` thread that once the thread leaveswthe take-upin aplortion of one take-up cycle,` the said thread will notbe accessible: tn the take-upmember until the verybeginning of the i nexttalre-up c-yclel Still a. further i lea;- ture of the guide means is. the arrangement there# of so that thef thread. is" held in thenpath ota take-up .-iinger;V to be engaged# thereby upenn-rotation. `of the take-npnngerto thewbesinningvof its `taire-sup stroke,` it matter-ingr not where `the take-up finger is positioned at thetimethe thread is `placed across its` path. ofvtravel `by the :guide means.

Still al 4further feature `of `the invention resides in the utilization oi azover` member for the head of the sewing machine, the cover member having guide means for the thread mounted thereon and adapted to move into particular guiding relation to the thread when the cover is applied in position. As a particular feature of this part of the invention, the said guide means on the cover are adapted to form an effective barrier between the take-up finger andthe thread, all as will presently appear.'

As still a further feature of the invention, the cover is adapted to lie in covering relation not only to the head, but to a portion of the arm of the sewing machine, of which the head is a the head of the machine to the needle so that none Aof the working parts or the thread are exposed.

As a further feature, a tension member is mounted under the cover and has a portion thereof exposed through an opening in the cover so that it may be readily adjusted.

I have thus outlined rather broadly the more important features of my invention in order that the detailed description thereof that follows may be better understood, and in order that my contribution to the.. art may be better appreciated. There are, of course, additional features of my invention that will be described hereinafter and which will form the subject. of the claims appended hereto. Those skilled in the art will appreciate that the conception on which my disclosure is based may readily be utilized by those skilled in the art as a basis for the designing of other structures for carrying out the several purposes of my invention. .It is important, therefore, that the claims to be granted me shall be of sufficient breadth to prevent the appropriation of my invention by those skilled in the art.

Itis also important to consider that while my invention is best utilized as a complete combination, certain parts thereof may be omitted while still leaving an effective operating structure. Thus, the arm of my take-up finger is an important portion thereof and will be claimed, but

a finger not having that arm may be sufficiently effective for many operations. Therefore, I feel myself entitled to claims covering sub-combinations of my invention.

Referring now to the drawings, Fig. 1 is a side elevation .of my machine, while Fig. 2 is an end elevation thereof. Fig. 3 is a View looking downwardly on a part of the mechanism mounted in a Awell of the arm oi the sewing machine and illustrating particularly certain of the parts shown in dotted lines in Fig. 1. Fig. 4 isa view similar to Fig. 1, but showing the cover in its -upper position and with certain of the parts of the machine moved into position for manipulation. Fig. 5 is a perspective view looking at the back ofthe head covering portion of the cover. f

Fig, 6 is a section taken along the line 8 3 of Fig` 7. Fig. 7 is a section taken along the line 'I-1 of Fig. l. Figs. 8,9, 10, and 11 are views similar to Fig. 7, but showing the relationship of the take-up mechanism to the hook in certain positions of the take-up mechanism. Fig. 12 is a vertical section takensubstantially along the line I2-I2 of Fig. 10. Fig. 13 is a section taken along line I3-I3 of Fig. 12. Figs. 14, 16, 18, and

f2() are views illustrating the relation of the thread I to the take-up mechanism in different positions of that take-up mechanism. Figs. 1, 5, 17, 19, and 21 are side views of Figs. 14, 16, 18, and 20, respectively.

Referring now more particularly to the drawings, and especially to Figs. 1 and 4, my sewing machine comprises a base member IU that is formed integrally with an upper arm II carrying what I term a. head I2 formed as a part thereof. The base of the machine is formed so that a rubber pad I3 may be secured thereto for the purpose of holding the machine against slippage on a smooth surface and for dampening vibrations. Within the base of the machine III there is mounted a suitable electric motor I4 that drives a conventional hook I5, the motor being effective through a pulley I6 and a belt II to drive an upper shaft I8 at a speed one-half the speed of the hook I5. A hand Wheel I9 that conforms to the general shape of the machine is secured to the shaft I8 for imparting rotation thereto when desired.

For covering the head I2 and the forward portion of the arm II, I utilize a cover member designated by the letter C and pivoted on a shaft 2li relatively to the arm II. The cover C has a. part 2l that is adapted to cover the head I2 and a part 22 adapted to cover a well formed in the arm II of the machine. In the position of the cover C in Fig. 4, both the well of the machine and the head I2 are exposed.

Referring now to Fig. 12, there is shown a forward bearing 23 for the upper shaft I8, the rear end of the said shaft being supported by a bearing 24 as best seen in Fig. l. A disc 25 is preferably formed as an integral part of the shaft I8 and carries an eccentric stud 28 about which is mounted the crank 21. This crank 2l extends downwardly and terminates in a pin 28 that is in driving relation to an arm 29 that is formed as an integral part of the needle bar 30 of my machine. This needle bar is suitably guided by a sleeve bearing 3|, and also by a pin 32 that is to the shaft 36 is a take-up disc 38 that is held thereto -by a washer 39 and a screw 40. The take-up disc 38 is thus adapted to be rotated at the same speed as shaft I8, or one revolution for each reciprocation of the needle bar 30 and each two revolutions of the hook I5, all for a purpose that will be understood by the experts in this art.

A circular groove 4I is formed in the take-up disc 38, the section of this groove being probably best shown in Figs. 12 and 1 3. The function of this groove will be described presently. Secured cn the4 take-up disc 33 is what I- term a take-up finger designated generally by reference numeral 12. This take-up finger is well illustrated in the drawings and especially in such Figures as 6, 7, and 14 to 21. The take-up finger 42 has a main domed part bearing reference numeral 43, and extending rearwardly from the domed part is a camming or stripping member dll. Extending forwardly from the domed main part of the finger 43 is an arm 45. The functioning of the parts of the finger will appear presently. The part 22.0f the cover C is formed withal;

dienlngH IIB".` throughV which.; is accessible:` the Aacl-.- justingwheel 41` of a spring tension` mechanism designatedgenerally by the letter. S.` This tension.` mechanism lies. under the` cover` C, but is accessible when the` cover is moved toitsi position of 4. The. construction of the tensionimechmism perr se .is not part of the invention to. be claimed specifically in this application and it Will,.theretore, not be described in detail. Howevenfthose skilled in the art will understand the construction very readily from the drawings and thegsimple description to bepresented. Abracket tis mounted on the head of the machine and supports a shaft49, the other end` of which is supported by a bent plate B `Cooperating with the plate 50 isa second plate 5I that is adapted for slidingmotion on theshaft 49 and to be maintainedlby a spring 52 pressed against the plate 50. The pressure of the spring 52 is, ofl course, adiustedbyrotation of the adjusting wheel `4I, thetsaid wheel'being threaded on-a portion of the shaft449 `for axial movement thereon, and the spring beingritself mounted-about the-shaft 49; The amountof spring pressure willldeterminethe tension` applied to the threadiT that passes between .plates 50, 5I as probablybest seen in ThefthreadT is Wound about a spool 53 that is appliedV to a supporting pin 513 extending from al bracket 55thatis pivoted on a shaft 56 in turn supported by a` bracket 51 secured within the wellfof thearm II of the machine. `It will be understood that the spool 53 is applied to the pin-l'when the bracket-55 is moved out of the welll-to its position of Figi 4. Thereafter, the bracket maybe rotated on theshaft 5t to its position shown in dotted lines in Fig. l andwithin the-well of the arm Il.` A suitable guide plate lis formed as an integral part of the bracket 55 andis adapted to guide the thread T` from the spool`-53 so that it willbe centered relatively to the-head of the-machine and may be readily applied between the two bent plates 50, 5I of theispring tension mechanism S.

Formed-integrally withthe` bracket 48 that supportspart of the `tension mechanism, is a downwardly extending guide plate Ilithatlspreferably grooved at El! to hold the thread T in guided relation thereto. It will be noted esn pecially from Figs. 4 and 12` that a `thread moved longitudinally cf the machine from the spool 53 and then dropped vertically downwardly along the plate 59 `will lie outwardly ofthe take-up disc andtthe` take-up linger l2 so that the Aringer may rotate relatively to the thread without con tacting it. Itis, of course, necessary, while maintaining the thread preferably in the plane of the groove GII of the `plate 5Fl, to bring the threadinto the path of movement of the take-up ringer 42. This is accomplished through additional guide means-preferably carried on the cover C, and new. to -bedescribed Referring to Fig. 5, the portion 2| of the cover C that covers the head of the machine has formed omits* inside face a guide wall Bt. This guide wall 6I extends for part of the circumference of a.` circle. and tapers at its ends into `the surface 6210i the cover 2 I. The extreme lower periphery of therwall BI is formed with a slot 63 leading to a bores G4 `.through which the thread T is adapted to'tpass.` The surface 52 below wall 5I extends intera guide shelf 65, and carries also a guide sprlngw.-` Holding springs 61 are also secured to-the-.cover C for the purposeof holding` it yleldingly in `ccwering relation to -thehead I2 of the: machine. A finger piece 68` formedftaspaft of cover C is adapted for the"applicationof` the fingersto move thecover.` from covering.` position to its position of4 Fig. 4..

The guide wall 6I is adapted, when the cover is in its position of Figs. 1, 12` and 13 tollie within the groove 4I of the take-up disc 38. It will be seen from the gures referred to that the wall 4Ia ofthe groove 4I will cooperate with thewall 6I to present a barrier against the. movementof the `thread T out ofthe guide bore 64 `and slot 63 vvithinA the wall 6I. Moreover, with the thread merely positioned within the groovet of` the plate`59 and extending freely downwardly toward the needle N carried by the needle` bar` 3Uas best seen in Fig. 7, the movement of the'cover into covering position will bring the slot 63 of wallSI in encompassing `relation to the thread T. Final snapping of the cover C into position as inFigpIZ, through `action of springs `6l, will bring thesthread T intothe bore 64 andvertically inwardlyof the machine so that `thethread T just below bore lies in the path of the linger 42, as probably best seen in Fig. 6.

It is not only the function of the wall 6| t form through its bore 64 and slot 63 a guide for the thread, but also to form` a protected zone into which the thread may move when it is stripped from the take-up finger in a manner to be def scribed. Thus, as will appear, the thread is dropped into a zone in which it is protected by the w'all 6I against movinginto the path lof the take-up linger after the finger hastbeenstripped of the thread and is movingltoward the beginning of a second take-up cycle. l

It will be noted that below the take-up disc 38 in Fig.` 12 there is secured on the head athread guiding bracket e9 slotted at 'Ill for the entry of the thread T. The thread is maintained within the slot 'Ill by the shelf 65 formed on the cover Cl From the slot 'Ill the thread moves under the wide spring 66` referred to in connection with Fig. 5, and thence downwardly to the needle Nsecured by a fastening member 'I I` to the needle` bar 30.

The take-up mechanism is, of course, cooperable with a hook I5 within` which is mounted a bcbbin B for furnishing the-thread that forms lock stitches with the thread T. It is, ofcourse, the function of the hook to engage and take up the thread from the take-up mechanism after it is stripped therefrom, and it isthe functionof the take-up mechanism to take-up the 'thread thereafter from the hook I5 so as to form, a stitch under the control `of the spring tension devices. A presser foot P is usedl as part of the machine and is controlled by a lever 12in a manner `vvlriich those skilled in the art will fully appreciate.

Ishall nowdescribe the operation of mysewing machine, and the manner in whichthe threadlT is applied thereto without the complex manipulations required by prior art mechanisms.` Starting with thelmachine in the condition .shown in Fig. 1, but withnothread therein, the rstistep necessary is to place the nger of the hand under the surface 68 to swing the cover C upwardly to its position of Fig. 4. The bracket livlsthen moved outwardly of the `wellof the arm II from its positionof 1 to its position of Fig. 4, and a spool 53 of thread T is applied to the pin 5B thatis formed as `part of the bracketf. `-'Then the spool may be `movediwith the bracketinto the dotted line position of Fig; l. The thread is passed into the slot 58a` of the-guide member 58 and then longitudinallyfand centrally oiithe ma 7 chine between the

spring tension plates

50, 5| of the spring tension mechanism.

The adjustmentof the spring tension mechanism is made by wheel 4l, the said wheel being availablefor manipulation when the cover is in its position of Fig. 1l or in its position of Fig. 4. From the spring tension mechanism the thread is moved downwardly in the groove GG of the guide plate 59 and into the hole of the needle N. The thread vwill now be in the vertical alignment shown in Fig. 7,but not in the particular relation fto the take-up finger .42 that is there illustrated. The cover Cis now swung downwardly into place until its springs 51 yieldingly secure it in the position of Fig. 12. The wall 6l will now be within the groove 4l of the take-up disc 38 and the Islot 63 will have encompassed the thread T with the thread moving into the vertical bore 64. The shelf B5 will overlie the slot l0 in the guide bracket 69 so as to maintain the thread within the slot 1B. .Flat spring 66 will press the thread yieldingly into the position-illustrated in Fig. 12.

The positions of the parts of the mechanism will be that shown in Fig. 7 when the take-up stroke begins. i Thus, as seen in Fig. '7, the take-up finger 42 begins a take-up cycleby bringing its arm 45 into overlying relation to the thread T. This is also approximately the relation of the parts in Fig. 6. The surface 43a of the domed portion 43 of the take-up detent 42 will next contact the thread T and upon further rotation of the nger will move the threadto the position of Fig. 8 from the position of Figs. 6 and '7. It will be noted that the hook is now giving up its thread to the take-up ringer. take-up finger from the position of Fig. 8 will bring it into the position of Figs. 14 and 15 relatively to the thread T. It will now be noted that the stripping and camming surface 44 of the 'linger 42 has contacted the thread and has already proceeded to move it away from the surface 43a of the domed portion 43 of the take-up finger. In other words, the surface 44 is beginning to impart a stripping action to the thread while the thread is being taken up.

The next position of the take-up finger 42 relatively to the thread is illustrated in Figs. 16 and 17. There, while the rotation from Figs. 14 and 15 has been very slight, the surface 44 has neverthe less contributed considerable stripping movement to the thread T and the thread is almost ready to leave the domed portion 43 to be engaged by the arm 45. Of course, in this position of the parts, the hook I5 is still giving up its thread for forming a lock stitch. From the position of Figs. 16 and 17, the take-up finger moves to the position of Figs. 18 and 19. In that position the finger is rotated but a slight degree from its position of Fig. 416, but the thread is now moving rapidly olf the domed member 43. This movement is so rapid that one side of the thread T is shown in Fig. 18 by a solid line and also by a dotted line to denote swift movement, the last position of the thread being shown by the dotted line.

In Figs. 20 and 21 the finger 42 is shown after a few degrees of rotation from the position of Fig. 18. Now the thread has moved entirely on" the domed portion 43 of the take-up iinger 42. At this point, the hook l5 has almost given up all of its thread and the end of the take-up stroke has almost been reached. In Fig. 9 we ycome to that part of'the take-up cycle where the hook has given up all its thread and the take-up iinger is completing the take-up stroke and moving thread Further rotation of the relatively to the spring tension imechanislm.. Thus, it is during .this last part of the stroke of the 4take-up mechanism that thread is pulled `from the spool under the control of the tension mecha.- nism, and it is in this -way that thetension mechanism controls the stitch. Therefore, if the` ten-I sion mechanism is lightly applied, the take-up device Awill pull the thread rather easily and the stitch will be loose. On the other hand, if ,the tension on the thread is increased, thenit'will take considerable force to move the threadrelatively to the tension mechanism and the stitches will be tight. The stripping motion of the .thread relatively to the nger is closely related to .a snapping action, the thread stripping vswiftly-off the arm of the inger at the completion ofthe take-up stroke, and just following the last movement of the thread relatively to the tension mechanism.` f When the thread has moved off the armf45 it falls looselysomewhat as indicated in dotted lines in Fig. 10, it moving then very rapidly toward the position shownin the solid line of Fig. 10. It

will be noted that as the thread falls loosely it is protected by the wall 6I from contact with the arm 45 of the take-up finger. The effect `is to shield the thread from the take-up finger 42 s0 that the linger will not again contact the thread until the ringer moves to its position of Fig. 7 to begin a new take-up cycle. In Fig. 11 we see the hook l5 moving the thread T downwardly and we observe the take-up linger 42 approaching the beginning of its next take-up stroke or cycle. In Fig. 7 the take-up finger is at the beginning or" its stroke and is ready to begin a second operation.

It lwill be well to emphasize at this point that because of the construction of the take-up finger, a natural and effective stripping :action takes place just as the iinger completes an effective take-up revolution. It will be noted further that the stripping action of the finger will not in any way interfere with the applicationv of the proper tension to the thread and the proper movement of the thread relatively to the tension mechanism at the completion of the take-up stroke. l 1t will cutter mechanism for preventing the winding `vof the thread by the take-up in the event of the-1 breaking of the thread. The practicallyauto'- matic threading of-my machine should also now be evident.

I believe that those-skilled in the art 'will fully appreciate the great merit that is inherent in my machine.

I now claim: i'

1. In a sewing machine of the class described; a sewing head, a take-up mechanism .comprising a rotating take-up iinger rotatably mounted on said sewing head, means guiding a thread Iso that it extends across the rotary path'of-said' take-up linger to be taken up by said linger, said guide means being open outwardly and transversely of the path of alignment of said thread by said guide means to allow outwardv transverse removal and 'replacement of said thread relai tively to said guide'l means, a self-stripping surface formed as 'a part of said take-up'iinger for contacting the thread upon rotation of said finger and for stripping the thread completely offf'said iinger'as s'adfing'er rotates whereby to leavesyaid lthread in a slack condition and means 1whereby the slack ofsaid thread is `then taken up and said `thread is moved freely of `said finger into .a jposition :across the rotary path of said take-up dinger.

Y2. In a `sewing machine of the -classldescribed a take-up mechanism `comprising a ,rotating ytake-up ngermounted for rotation on a horiu Zonta-l axis, means guiding a `thread so that it Aextends substantially diametrically across the -rotary path of said take-up finger to Vbe taken up by said iinger, said linger contacting said thread when said finger reaches its lowermost position `relatively `to said axis and havingargenM erally tapering thread contacting surface that is self-stripping as said `linger rotates towardits .uppermost position relatively Vto said `axis `and .exerts takeup pullwon said thread, whereby said `thread strips oli said finger as said `finger moves .to substantially said uppermost and full take-up position and leaves said `nger as it ,passes rthrough full Atalreup position, and ,a hook for taking up `said thread and positioning it once ,again across the path df said finger.

3. In a sewing machine of the-,classdescribed `fup position and then leaves said nger as it passes `through' full take-up position.

`6. In a sewing machine of the class described, a rotary take-up finger, a rotary bobbin hook, means mounting said nger and hook for rota` tion on parallel horizontal axes vertically spaced with said take-up finger above said bobbin hook, a needle bar carrying a needle kat its lower end, means mounting said needle bar for vertical reciprocation, a tension member positioned vertically above said take-up finger, thread guiding means for guiding said thread so that when it is substantially fully accepted by said bobbin hook and about to be contacted by said finger take-up it will extend from said tension membersubstari tially diametrically across the circular path of said take-up nger and toward the needle in substantially a single plane, said guide means open `outwardly and transversely of the path ofalignment of said thread bysaid guide `means to allow outward transverse removal and replacement .of said `thread relatively to said guide means, `said finger having a generally tapering thread conl rtacting surface that is self-stripping as said liger a take-up mechanism comprising a ,rotatingh take-up nger, means guiding a thread so that it extends across the rotary :path of said take-,up finger to be taken `up by said finger, said finger 'having a self-stripping surface that contacts the thread upon rotation `of said ,finger to strip the ithread therefrom, ra self-stripping retaining arm formed -as part of lsaid linger and engaged by the thread stripped from said finger surface `as said take-up finger rotates to full take-up posi- `tion, said thread then stripping off said retaining Iarm as said finger rotates beyond full takenup position.

4. `In a sewing machine of the class described, 4a vtake-up mechanism comprising a rotating `take-up finger, means guiding athread so that -it extends across the `rotary path of said take-up dinger to he taken up by said finger, said finger 'having a selfstripping surfaceland also `a. retaining arm that overlies the thread in advance of 'the surface of Vsaid finger striking the thread, the pull on said thread by said finger as it conftinues to rotate after striking said thread tendfing `through said self-stripping Asurface to pull ,said thread oi said linger and onto saidretain- `iing arm until said :take-iup iingerreaches full `takemp position, further -rotationof said-finger `and 'its retaining arm pullingsaid thread ofi the @end of said arm in the direction-of rotation of said linger and arm.

75. V-In ra. sewing machine of the ,classldescribed, 1a sewing head, a :rotary talee-,up finger, arotary ibobbin hook, means mountingsa id linger on said sewing head for rotation labout `a xed Aaxis par- .allel to the axis oisaidl-bobbin hook, `guide means on said head for guiding ,a thread so that it lies substantially `diame'trically of the ,circula-r path .of said take-up linge-,r when it is substantially fully accepted -by `said -bobbin hookand said take-np linger is `about `to contact said thread to begin the tahe--upstroka said guide means `being Lopen outwardly transverselyof--the path of alignment of said `thread by said guide means to` allow cutvvard l,transverse removal and replaces nient `of said threadrelatively .to said`kguide means, said nger having a generally `tapering .thread contacting 4susface that is self-:stripping as said linger rotates exerts take-up pullon .said thread, whereby saidthread tends; tostrip ,off .saidingerlas said linger moves tofulltalre- '51; `up direction-,as.thefingerirotates the continued rotates `and ,exerts take-up pull on saidthread, whereby said thread` tends through vcontact `with said self-stripping surface to strip olic said finger :as `said linger moves to full take-up `position and then leaves said finger as it passes through full take-up position. l

7. In asewing -machine ofthe class described, a .take-up mechanism comprising a rotating taireup finger, said finger `having a surface that first :contacts -the thread moving it in a `take-up dirrection `as the finger rotates, the continued rota tion of said nger `moving a tapering land` cam `ming surface of said finger `against lsaid thread so rthatthe continued pull on the thread incidental to the take-up thereof will tend to strip said thread from said finger because of the action of s-aid Atapering ,and camming surface o-n said thread, the rotation of said linger through its take-up position acting to fully strip said thread therefrom, and said tapering and` cammingrsurfface being formed so that the total rotation .of

:said :take-,up -mechanism from its point of contact to the pointwhere the thread is stripped fromlsaid surfaces is approximately between and 1,75".

8. In a sewing machine of the class described, a take-up mechanism, means for rotating `said Atake-up mechanism, means guiding athreadjso that it `extends `across the rotary Apath of said take-,up mechanism to be taken up thereby, said take-up mechanism having a iirst surface Ythat rstcontacts the thread ,to rnove it in a takeup direction, `said take-up mechanism having :a `sec- .ond surface that is tapered in. a .direction Yto cam the thread off said iirst` surface as said second surface rotates, the said second` surface .contacting the thread only after `some rotation of said take-up mechanism has taken up some `of said lthread through action of said first surface, `and "the continued pull on the `tlfiread incidental ,to the take-up thereof stripping the thread `from said surfaces, the total r-otationcf said take-up mechanism from itslpoint of `contact to the point Where tthe thread is stripped ,from said surfaces being approximately between 145 and 175. l 1

9.1In a sewingemachine of the class described, a take-up mechanism comprising a rotatingtakef- `up finger, means `guiding a thread `so that itextends across the .rotary path ofsaid finger to be taken up thereby, said fingerhaving a surface that first contacts the thread `moving it in a takerotation of said linger moving a tapering and camming surface thereof against said thread so thatthe continued pull on the thread incidental to the take-up thereof will tend to strip said Ithread from said finger because of the action of said tapering and camming surface on said thread, a self-stripping retaining arm on said finger extending in the direction of its rotation, the continued rotation of said finger to its takeup position acting to pull the thread off said iinM ger surface and onto said retaining armuntil said take-up nger reaches full take-up position, further rotation of said finger and its retaining arm pulling said thread off the end of said arm in 'the direction of rotation of said finger and arm.

` 10. In a-sewing machine of the class described, a take-up mechanism, means for rotating said take-up mechanism, means guiding a thread so that it extends across the rotary path of said take-up mechanism to be taken up thereby, said take-up mechanism having a rst surface that first contacts the thread to move it in a take-up direction, said take-up mechanism having a second surface that is tapered in -a direction to cam vthe thread off said rst surface as said second surface rotates, the said second surface contacting the thread only after some rotation of said take-up mechanism has taken up some Vof said thread through action of said first surface, a selfstripping retaining arm formed as part of said take-up mechanism extending in the direction of its rotation, the continued rotation of said takeup mechanism to its take-up position acting thro-ugh said second surface to pull the thread off said rst two surfaces and onto said retaining prising a rotary take-up finger, means for rotating said take-up mechanism on said sewing head o n an axis parallel to the axis of rotation of said b'obbn hook, guide means on said sewing head fo-r guiding a thread so that it lies substantially diametrically of the circular path of said take-up 'linger when it is substantially fully acceptedby 'said bobbin hook and said take-up finger is about to contact said thread to begin the take-up stroke, said guide means being open outwardly and transversely of the path of alignment of said thread by said guide means to allow outward transverse removal and replacement of said thread relativeli7 to said guide means, said iinger having a surface that iirst contacts the thread moving it in a takeup direction as the nger rotates, the continued :rotation of said finger moving a tapering and camming surface thereof against said thread so that the continued pull on the thread incidental to the take-up thereof will tend to strip said thread from said nger because of the action of said tapering and lcamming surface on said thread, and the rotation of said finger through its take-up position acting to fully strip said thread therefrom. d

12. In a sewing vmachine of the class described, a sewing head, a rotary take-up finger, a rotary bobbin hook, means mounting said ringer and hook for rotation on parallel horizontal axes vertically spaced with said take-up finger on said sewing head and above said bobbin hook, a needle bar carrying a needle at its lower end, means 12 mounting said needle bar for vertical reciprocation, a tension member positioned vertically above said take-up nger, thread guiding means for guiding said thread so that when it is substantially fully accepted by said bobbin hook and about to be contacted by said take-up finger it will extend from said tension member substantially diametrically across the circular path of said take-up linger and toward the needle in substantially a single plane, said guide means being open outwardly and transversely of the path of alignment of said thread by said guide means to allow outward transverse removal and replacement of said thread relatively to said guide means, said finger having a surface that rst contacts the thread moving it in a take-up direction as the finger rotates, the continued rotation of said finger moving a tapering and camming surface thereof against said thread so that the continued pull on the thread incidental to the take-up thereof will tend to strip said thread from said finger because of the action of said tapering and camming surface on said thread, and the rotation of said linger through its take-up position acting to fully strip said thread therefrom.

13. In a sewing machine of the class described, a rotary take-up linger, a rotary bobbin hook, means mounting said finger and hook forrotation on parallel horizontal axes vertically spaced with said take-up iinger above said bobbin hook, a needle bar ycarrying a needle at its lower end, means mounting said needle bar for vertical reciprocation, a tension ,member positioned vertically above said take-up iinger, thread `guiding means for guiding said thread so that when it is substantially fully accepted by said bobbin hook and about to be contacted by said take-up linger it will extend from said tension member substantially diametrically across the circular path of said take-up nger and toward the needle in substantially a single plane, said take-up mechanism having a rst surface that rst contacts the thread to move it in a take-up direction, said take-up mechanism having a second surface that is tapered in a direction to cam the thread 01T said first surface, the said second surface contacting the thread only after some rotation of said take-up finger has taken up some of said thread through action of said rst surface, a self-stripping retaining arm formed as part of said take-up mechanism extending in the direction of its rotation, the continued rotation of said take-up mechanism to its take-up position acting through said second surface to pull the thread off said first two surfaces and onto said retaining arm until said take-up mechanism reaches full take-up position, further rotation of said take-up mechanism pulling said thread on? the end of said arm in the direction of rotation of said take-up mechanism.

14. In a sewing machine of the class described, a head, a take-up disk having take-up means thereon, means mounting said disk for rotation on said head, a cover for said head, means pivoting said cover for movement into and out of covering relation, thread guiding means on said head, a second thread guiding means on the inside of said cover movable into thread guiding position against said thread when said cover moves into covering relation to said head whereby thread is then guided between said head and cover, the thread guiding means of said cover being positioned radially immediately inwardly of the path of rotation of said take-up means on means on the inside of said cover movable into l thread guiding :positionagainst said thread when said cover moves into covering .relation to said head whereby thread is then guided between said head andoovenxthe thread guidingmeans of said cover being `positioned radially 4immediately inwardly ofthe path of rotation of said ltakeeup finger so that said take-up ringer contacts .the thread just radiallybeyond said guide means on the cover. v

`16. In a sewing `machine or thevclass described, a Lhead, a `take-,up disk having take-up `means thereon, means mounting saiddisk `for rotation .onfsaid head, acover forsaid head, means pivoting said cover ,for movement into and out of covering relation, thread `guiding means `on said head, a second thread guiding means on said ,cover movable into thread guiding position `when said cover moves into coveringrrelation to 1said head whereby l,thread is then guided between said head andino-ver, the thread guiding means of said cover-being :positioned `radially immediately `inwardly of `the path `of `rotation of `saidtake-up :mea-neon p said take-up dislryso` that said `take-up means contacts the thread fjust radially beyond said'guide means on `the .'cover, said 'guide means on said cover extending into Aco-action with a circumferential `wall `of said :take-np ,disk to form a` barrier against the `movement of ithe'thread beyond said hover guide means except through said guide means.

17. In a sewing machine ofvthe class described,

ahead, a, rotary take-up means, `means `iriounting said `rotary `take-up means for rotation on said head, a cover for said head, means pivotingsaid `cover for movement :into and :out of covering ren 1lation to said head, a irstthread fgu'idingmeans la head, a rotary take-upmeans,meansmounting saidrotary 'take-upfmeans for rotation on said `head,a cover for said head, .means pivoting said cover for movement into and 'out oflcoveringre- `lation `to said head, a rst thread 'guidingmeans on therupper portion of said head above the path of `said take-up means, `a s'econd thread guiding means on said icover movable into thread guiding `position when said `cover moves 1into covering relation to saidfhead, `said thread guiding `means on said cover being `then positioned below said 'iirst guide means andbelow the `axis 'of rotation of said rotary takeeup means and radially just Vinwardly of said take-up means, Awhereby said take-up means will rotate to pick up thread that has just moved through said second guide means, andiwall means formed for cooperation with said second guide means to form a barrierbetween a partl of the path `of sadnrotary` take-up means 14 anda part yof the area lying Ainwardly of said wall means and second guide means.

19. In a sewing'machine of the 4class described, a head, a takeup dish having take-up means thereon, means mounting said disk forrotation on said head, a cover for said head, .meanspivoting said cover :for movement into and out of covering relation, thread guiding means on said head, a second thread guiding means on said coverrnovable into thread guiding position when said `cover `moves `into covering relation to said head whereby thread is then guided between said `head and cover guide means, the second thread "guiding means being positioned radially immediately vinwardly `or the pathof rotation of said talreup means on said take-up disk so that said take-up means contacts the thread `just radiallysbeyond said guide means on the cover, and curved Walls formed as extensions of said second guide means to form a barrier against movement of the thread from the inner zone defined bysaidcurved Walls into the path of movenient or" said tahe-up means, said second guide means having a slot through which passessaid thread.

20. In a sewing machine of the class described, ahead, takemp diskzhaving `take-up means thereon,fmeans mounting said disk for rotation onsaid. heada coverfor said head, means` pivoting said cover for movement into andout of covering relation, thread guiding means on said head, a second :threadguiding 'means on said cover movable `into thread guiding `position when saidcover moves into `covering relation to said head whereby thread isthen guided between said head and coverguide means, "the second thread guiding means being positioned radially immediatelyinwardly `of 4the `path `of .rotation of said take-up means `on said take-updiskso `that said take-up means contacts the `thread just radially beyond Said `guide means on the cover, curved Walls formed aseXtensions of said second guide means .to formva `barrier against movement of the thread fromzthe inner zone dened by said curved Walls into the path ofmovement of said take-up means, said second guide means having a slot through which passes said thread, and said disk having `a circular .wall `,juxtaposed to said second guide means `whereby -as said disk rotates said `circular wall formsa` closure for the open end of the slot throughwhichsaid thread passes.

A21. Ina sewing .machine of the class described, a head, a `rotary takeeup means, means mounting said rotary `take--up means forrotationxon said head, a cover for said head, means `pivoting said .cover for movement into and out ofcovering relation to said head, a rst thread guiding .meanson saidhead, a second thread guide means 'on said cover movable into `thread guiding position when said cover `moves into covering relation to said head, saidthread guiding means on said cover being then positioned below' said Yfirst guide means and below the axis of rotation `of said `rotaryta1 :e'up `means and radially justinwardly of said take-up means, whereby said take-up means will rotate to pick Aup thread `that `has just'moved throughsaid second guidemeans, Wall `means formed for coo eration with `said 4second guidemeans` to forma barrier between a part of the `path of said rotary take-up means and a part ofthe area `lying inwardly of said Wall means and `second guide means, said `take-np `means*comprising a finger having a iir'st surface that contacts the thread just :below `said second guide 2means `and a second self-stripping sur- I face that contacts the thread and cams it off said iinger in a zone above said wall means and into the area inwardly of said wall means.

*22; In a sewing machine of the class described, a head, a rotary take-up means, means mounting said rotary take-up means for rotation on said'head, a cover for said head, means pivoting said cover for movement into and out of covtering-relation to said head, a iirst thread guiding means on. said head, a second thread guiding means on said cover movable into thread guiding position when said cover moves into covering relation to said head, said thread guiding means on said cover being then positioned below said first guide means and below the axis of rotation of said rotary take-up means and radially just inwardly of said take-up means, whereby said takeup means will rotate to pick up thread that has just moved through said second guide means, and curved walls formed as extensions of said second guide means to form a barrier against movement of the thread from the inner zone defined by said curved walls into the path of movement of said take-up means, said second guide means having a slot through which passes said thread, said take-up means comprising a nger having a iirst surface that contacts the thread just below said second guide means, and a second Selb-stripping surface that later contacts the thread and cams it off said ringer into the inner zone defined by said wall 'means 23. In a sewing machine of the class described, ahead,v a take-up disk having take-up means thereon, means mounting said disk for rotation on said head, a cover for said head, means pivoting said cover for movement into and out of covering relation, thread guiding means on said head, a second thread guiding means on said cover movable into thread guiding position when 'said cover moves into covering relation to said head whereby thread is then guided between said head and cover guide means, the second thread guiding means being positioned radially immediately `inwardly of the path of rotation of said takeup means on said take-up disk so that said take-up means contacts the thread just radially beyond said guide means on the cover, curved walls formed as extensions of said second guide means to form a barrier against movement of the thread from the inner Zone defined by said curved walls into the path of movement of said take-up means, said second guide means having a slot through which passes said thread, said disk having a circular wall juxtaposed to said second guide means whereby as said disk rotates said circular wall forms a closure for the open end of the slot through which said thread passes, said take-up means comprising a finger having a first surface that contacts the thread just below said second guide means, and a second self-stripping surface that later contacts the thread and cams it ofi said. finger into the sone inwardly of said wall means.

24. In a sewing machine of the class described, a head, a take-up mechanism comprising a rotating take-up finger, means mounting said take-up nger on said head for rotation on a horizontal axis, a rst thread guide positioned vertically above the circular path of said iinger and in a vertical plane spaced from the plane of said finger so that a thread dropped vertically will lie ,out of the path of said finger, a second guide means mounted on said machine and having a slot through which the thread is passed from vsaid rst guide, said second guide lying just above the pathcf'said finger with the thread guided thereby to lie in a vertical plane diametric of the path of said iinger and accessible to said nger just below said slot, a third guide means for said thread below the path of said linger, said nger having a generally tapering thread contacting surface that is self-stripping as said nger rotates and exerts take-up pull on said thread, whereby said thread tends to strip off said finger as said ringer moves to full take-up position and then leaves said finger as it passes throughfull take-up position.

25. In a sewing machine of the class described. a head, a take-up mechanism comprising a rotating take-up linger, means mounting said takeup :finger on said head for rotation on a horizontal axis, a iirst thread guide positioned vertically above the circular path of said nger and in a vertical plane outwardly spaced from the plane of said finger so that a thread dropped vertically will lie out of the path of said nger, a second guide means mounted on said machine and having a slot through which the thread is passed from said rst guide, said second guide lying just above the path of said finger with the thread guided thereby to lie in a vertical plane diametric of the path of said finger and accessible to said finger just below said slot, a third guide means for .said thread below the path of said Lnger, said iinger having a generally tapering thread contacting surface that is self-stripping as said finger rotates and exerts take-up pull on said thread, whereby said thread tends to strip off said ringer as said nger moves to full take-up position and then leaves said ringer as it passes through full take-up position, and curved walls formed as extensions of said second guide means to form a barrier against movement of the thread from the inner zone dened by said curved Walls into the path of movement of said take-up means except through said slot.

26. In a sewing machine of the class described, a head, a take-up mechanism comprising a rotating take-up nger, means mounting said take-up linger on said head for rotation on a horizontal axis, a rst thread guide positioned vertically above the circular path of said finger and in a vertical plane spaced outwardly from the plane of said finger so that a thread dropped vertically will lie out of the path of said finger, a second guide means mounted on said machine and having a slot through which the thread is passed from said irst guide, said second guide lying just above the path of said finger with the thread guided thereby to lie in a vertical plane diametric of the path of said finger and accessible to said nger just below said slot, a third guide means for said thread below the path of said finger, said iinger having a iirst thread contacting surface and a second generally'tapering thread contacting surface that contacts the thread as said iinger rotates and strips said thread from said iinger a's it exerts take-up pulls on said thread, whereby said thread leaves said fingers as the iinger rotates through full take-up position less than from the point of iirst contact with said thread, and a curved wall formed as an extension of said second guide means to form a barrier against movement of the thread from the inner zone dened by said curved wall into the path of movement of said take-up means after said thread is stripped therefrom except through said slot.

2'?. In a sewing machine of the class described, a head, a take-up mechanism comprising a rotating take-up finger, means mounting Saidtakeup nger on said headlforrotation `on a horizontal axis, ,a rstihread guide positioned `vertically above'the circular path of said finger and in a vertical plane spaced outwardly fromthe plane of said finger "so that a thread droppedivertically therefrom will not lie in the path of said finger, apovervpivoted on said head for movementinto andgout of cover relation, a second guidemeans secured ongsaid cover and having-a slot `adapted toferlvejlopfthe thread `extending from said first guide means as said cover ismoved to covering position, said second guide means lying with its slot justabove the pathof said finger and closer tosaid `,head than said rst `guide means `wherebyxthe `thread. is accessibleto `said rotary nger just below said slot, a third guide means for said thread below the path of said finger, said finger having a first thread contacting surface and a second generally tapering thread contacting surface that strips the thread from said finger as said nger rotates and exerts take-up pull on said thread, and curved walls formed as extensions of said second guide means to form a barrier against movement of the thread from the inner zone dened by said curved walls into the path of movement of said take-up means except through said slot, said thread moving into said inner zone from said take-up finger as it is stripped from said finger.

28. In a sewing machine of the class described, a head, a takeup mechanism comprising a rotating take-up finger, means mounting said takeup finger on said head for rotation on a horizontal axis, a first thread guide positioned vertically above the circular path of said finger and in a vertical plane spaced outwardly from the plane of said iinger so that a thread dropped vertically therefrom will not lie in the path of said finger, a cover pivoted on said head for movement into and out of cover relation, a second guide means secured on said cover and having a slot adapted to envelop the thread extending from said first guide means as said cover is moved to covering position, said second guide means lying with its slot just above the path of said nger and closer to said head than said first guide means whereby the thread is accessible to said rotary finger just below said slot, a third guide means for said thread below the path of said finger, said finger having a first thread contacting surface and a second generally tapering thread contacting surface that strips the thread from said nger as said finger rotates and exerts takeup pull on said thread, and curved walls formed as extensions of said second guide means to form a barrier against movement of the thread from the inner zone dened by said curved walls into the path of movement of said take-up means except through said slot, said thread moving into said inner zone from said take-up finger as it is stripped from said linger, the said finger rotating approximately 145 to 175 from the point of contact with said thread to the point where said thread is stripped therefrom.

29. In a sewing machine of the class described, a head, a take-up mechanism comprising a ro"` tating take-up nnger, means mounting said takeup finger on said head for rotation on a horizontal axis, a first thread guide positioned vertically above the circular path of said iingei` and in a vertical plane spaced from the plane of said iinger so that a thread dropped vertically from said guide will not lie in the path of said finger, a cover pivoted on said head for movement into and out of cover relation, a second guide means secured 18 en ,said cover and' having aslot adapted to` envelop the threadextending iromisaid iirstiguide means assaid coveris moved to covering position, said second guide` means lying with ,its slot just above the path ofsaid finger and. closer tosaid head than wsaidiirst guide `means whereby 'the thread accessible to said rptarynger just below said slot, a third guide means for said thread below the path of said finger, said linger having a gen` erally,'.tapering thread `contacting surface that is selfestripping as` saidiinger rotates and exerts take-up pull on said'fthread, whereby said thread` tendsto strip Voii "s aid finger as said 'iinger moves to full take-up position Land then leaves said finger as i itfpasses, through ,full `take-,np position, and' said rotary `-talre-upNnger having a ,circular` wall juxtaposed to saifdsecond guide means whereby assaid disk rotatesfsaidlcircular wall forms` a closure forftlfiue open endlfof theslot through which saidthread passes.

30. In a sewing machine, a main frame having the usual horizontally extending arm terminating in a sewing head, a cover for said head, means pivoting said cover on said arm on an axis rearwardly of said head, a well in said arm between said head and said axis covered by a part of said cover, and a thread spool support in said well,

31. In a sewing machine, a main frame having the usual horizontally extending arm terminating in a sewing head, a cover for said head, means pivoting said cover on said arm on an axis rearwardly of said head, said cover having a head covering portion and an arm covering portion angularly related to one another so that said cover may be swung on said axis to bring both cover portions into position, that part of the arm that is covered bysaid cover having a well therein, and a thread spool support in said well.

32. In a, sewing machine, a main frame having the usual horizontally extending arm terminating in a sewing head, a cover for said head, means pivoting said cover on said arm on an axis rearwardly of said head, said cover having a head covering portion and an arm covering portion angularly related to one another so that said cover may be swung on said axis to bring both cover portions into covering position, that part of the arm that is covered by said cover having a well therein, a thread spool support in said well` and guide means for guiding a thread from a spool on said support under said cover and toward said head.

33. In a sewing machine, a main frame having the usual horizontally extending arm terminating in a sewing head, a cover for said head, means pivoting said cover on said arm on an axis rearwardly of said head, a well in said arm between said head and said axis covered by a part of said cover, a thread spool support in said well, a thread guide in said well for guiding the thread, a tension member at said head to which the thread is applied, take-up means on said head tc which the thread is led from said tension member, all

of said guide means lying under the cover when 19 iemetreaily of the circular path of said take'up nge'r when it is substantially fully accepted b'y s'a-d bobbin hook and said take-up linger is about to contact said thread 'to begin the take-iup stroke, 'said guide means being -open outwardly and transversely of the path of alignment of 'said thread by said guide means to allow outward transverse removal 'and replacement of said thread relatively 'to said guide means, said finger having a 'generally 'tapering 'thread 'contacte ing surface that is self-stripping as seid 'finger rotates and v'exerts takeup pull on said ltnread, whereby said thread tends to 'strip off said finger es said 'finger moves to 'full take'up position and then leaves V*said finger as it Vpasses through full take-up position, 'and guide means on said cover holding seid thread against said transverse re'- r'novel from 'seid guide means. l

GLEN A. HOLLAND.

0 REFERENCES omen The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 705,221 Diehl et al July 22, 1902 A 139,157 Diehl et al Sept. S15, 1903 l1,148,794 Parkes Aug. 3, 1-915 2,390,681 Backlin e Dec. 1l, 1945 FOREIGN PATENTS Number Country Date 351,852 Germany ewe Apr. 13, 1922 355,269 Germ-*any ...n lh June 24, A1922

US630288A 1945-11-23 1945-11-23 Sewing machine take-up Expired - Lifetime US2516874A (en)

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US2516874A true US2516874A (en)	1950-08-01

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US2704527A (en) *		1955-03-22		Theenhausen
US2760457A (en) *	1951-02-15	1956-08-28	Rabezzana Hector	Sewing machine
US2866427A (en) *	1956-03-17	1958-12-30	Pfaff Ag G M	Looper thread take up for double chain stitch sewing machines
USD292930S (en)	1985-01-23	1987-11-24	Maruzen Sewing Machine Co., Ltd.	Sewing machine
USD462703S1 (en)	2001-08-28	2002-09-10	The Singer Company Limited	Sewing machine
USD697948S1 (en) *	2012-12-24	2014-01-21	Brother Industries, Ltd.	Sewing machine
USD726781S1 (en) *	2013-11-26	2015-04-14	Aisin Seiki Kabushiki Kaisha	Sewing machine
USD849063S1 (en) *	2017-06-23	2019-05-21	Guangzhou Huafeng Mechanical & Electrical Co., Ltd	Sewing machine
USD914771S1 (en) *	2020-09-04	2021-03-30	Guangzhou Yinweige Import and Export Trading Co., Ltd	Sewing machine

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US2390681A (en) *	1941-11-05	1945-12-11	Willcox & Gibbs Sewing Machine	Thread take-up device

1945
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2704527A (en) *		1955-03-22		Theenhausen
US2760457A (en) *	1951-02-15	1956-08-28	Rabezzana Hector	Sewing machine
US2866427A (en) *	1956-03-17	1958-12-30	Pfaff Ag G M	Looper thread take up for double chain stitch sewing machines
USD292930S (en)	1985-01-23	1987-11-24	Maruzen Sewing Machine Co., Ltd.	Sewing machine
USD462703S1 (en)	2001-08-28	2002-09-10	The Singer Company Limited	Sewing machine
USD697948S1 (en) *	2012-12-24	2014-01-21	Brother Industries, Ltd.	Sewing machine
USD726781S1 (en) *	2013-11-26	2015-04-14	Aisin Seiki Kabushiki Kaisha	Sewing machine
USD849063S1 (en) *	2017-06-23	2019-05-21	Guangzhou Huafeng Mechanical & Electrical Co., Ltd	Sewing machine
USD914771S1 (en) *	2020-09-04	2021-03-30	Guangzhou Yinweige Import and Export Trading Co., Ltd	Sewing machine

Publication	Publication Date	Title
US2516874A (en)	1950-08-01	Sewing machine take-up
US3693566A (en)	1972-09-26	Bobbin thread replenishing mechanism for sewing machines
US4259914A (en)	1981-04-07	Bobbin winding mechanism for a sewing machine
US4326474A (en)	1982-04-27	In-place bobbin winding mechanism for a sewing machine
US2866425A (en)	1958-12-30	Lockstitch sewing machines
US3693565A (en)	1972-09-26	Lockstitch loop takers for sewing machines
US2546393A (en)	1951-03-27	Sewing-machine driving mechanism
US4292906A (en)	1981-10-06	Rotatable loop taker and bobbin case assembly
US3115110A (en)	1963-12-24	Lock stitch sewing machine with locking thread replenishing means
JPH0236277B2 (en)	1990-08-16
US2511367A (en)	1950-06-13	Button sewing machine
US2851978A (en)	1958-09-16	Sewing machines
US4200050A (en)	1980-04-29	Thread cutting device for lockstitch sewing machines
US1548464A (en)	1925-08-04	Lock-stitch sewing machine
US2609773A (en)	1952-09-09	Thread handling mechanism for sewing machines
US1460177A (en)	1923-06-26	Thread controller for sewing-machine take-ups
US2516875A (en)	1950-08-01	Rotary take-up for sewing machines
US1723195A (en)	1929-08-06	Thread controller for sewing machines
US3486473A (en)	1969-12-30	Non-spill bobbin case for sewing machines
US1406180A (en)	1922-02-14	Sewing machine
US3051111A (en)	1962-08-28	Thread severing means for sewing machines
US2077151A (en)	1937-04-13	Sewing machine
US2446245A (en)	1948-08-03	Sewing machine
US4385574A (en)	1983-05-31	Thread guiding and hold-down pawl for bobbin winding mechanism of a sewing machine
US1829227A (en)	1931-10-27	Take-up mechanism for sewing machines

US2516874A - Sewing machine take-up - Google Patents

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Cited By (9)

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