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US2989016A - Sewing machines - Google Patents

Sewing machines Download PDF

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Publication number
US2989016A
US2989016A US634719A US63471957A US2989016A US 2989016 A US2989016 A US 2989016A US 634719 A US634719 A US 634719A US 63471957 A US63471957 A US 63471957A US 2989016 A US2989016 A US 2989016A
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US
United States
Prior art keywords
needle
bar
work
loop
taker
Prior art date
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
US634719A
Inventor
Ralph E Johnson
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.)
Singer Co
Original Assignee
Singer 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.)
Filing date
Publication date
Priority to NL123695D priority Critical patent/NL123695C/xx
Priority to NL202427D priority patent/NL202427A/xx
Priority to DENDAT1302984D priority patent/DE1302984B/de
Priority to NL106140D priority patent/NL106140C/xx
Priority to NL291738D priority patent/NL291738A/xx
Priority to US249872A priority patent/US2662468A/en
Priority claimed from US471766A external-priority patent/US2862468A/en
Priority to DES46453A priority patent/DE1222772B/en
Priority to DES53145A priority patent/DE1140055B/en
Priority to DES53143A priority patent/DE1092286B/en
Priority to GB20460/57A priority patent/GB808354A/en
Priority to GB21178/57A priority patent/GB808356A/en
Priority to GB4204/58A priority patent/GB808357A/en
Priority to GB20635/57A priority patent/GB808355A/en
Priority to GB18369/57A priority patent/GB808352A/en
Priority to GB20270/57A priority patent/GB808353A/en
Priority to GB21177/57A priority patent/GB809217A/en
Priority to GB33690/55A priority patent/GB808351A/en
Priority to CH339479D priority patent/CH339479A/en
Priority to CH340123D priority patent/CH340123A/en
Priority to FR1138940D priority patent/FR1138940A/en
Priority to CH356658D priority patent/CH356658A/en
Priority to CH340694D priority patent/CH340694A/en
Priority to CH340125D priority patent/CH340125A/en
Priority to CH340695D priority patent/CH340695A/en
Priority to CH339481D priority patent/CH339481A/en
Priority to US591718A priority patent/US2848963A/en
Priority to US626908A priority patent/US2973733A/en
Priority to US627189A priority patent/US2920593A/en
Priority to US627878A priority patent/US2900940A/en
Application filed by Singer Co filed Critical Singer Co
Priority to US634719A priority patent/US2989016A/en
Priority to US634755A priority patent/US2921545A/en
Priority to US634904A priority patent/US2966130A/en
Priority to GB18656/57A priority patent/GB834842A/en
Priority to FR72108D priority patent/FR72108E/en
Priority to CH345791D priority patent/CH345791A/en
Publication of US2989016A publication Critical patent/US2989016A/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B57/00—Loop takers, e.g. loopers
    • D05B57/08—Loop takers, e.g. loopers for lock-stitch sewing machines
    • D05B57/10—Shuttles
    • D05B57/14—Shuttles with rotary hooks
    • D05B57/143—Vertical axis type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B27/00—Bundling particular articles presenting special problems using string, wire, or narrow tape or band; Baling fibrous material, e.g. peat, not otherwise provided for
    • B65B27/08—Bundling paper sheets, envelopes, bags, newspapers, or other thin flat articles
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B19/00—Programme-controlled sewing machines
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B55/00—Needle holders; Needle bars
    • D05B55/02—Devices for fastening needles to needle bars
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B73/00—Casings
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B73/00—Casings
    • D05B73/04—Lower casings
    • D05B73/12—Slides; Needle plates
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B29/00—Pressers; Presser feet
    • D05B29/06—Presser feet

Definitions

  • This invention relates to improvements in sewing machines and more particularly to sewing machines of the ornamental stitch variety in which the needle-bar is adapted to be reciprocated endwise of itself at the same time that it is shifted laterally of the direction of work feed.
  • a more specific object of the present invention is to provide a sewing machine which employs a vertical axis rotary loop-taker with a needle-barmechanisrn of the type wherein the needle-bar is reciprocated in a path which extends within the confines of the loop-taker and at the readily understood by those skilled in the art.
  • FIG. 1 represents a front perspective view of a sewing machine in which the present invention is embodied.
  • FIG. 2 represents a side elevational view in axial cross section of the sewing machine illustrated in FIG. 1.
  • FIG. 3 represents a top plan view of the sewing machine disclosed in FIG. 1 with the cover plate removed therefrom.
  • FIG. 4 represents a fragmentary elevational view of the actuating drive for the needle-bar.
  • FIG. 5 represents a sectional view taken substantially on the line 5-5 of FIG. 2.
  • FIG. 6 represents a sectional view of the machine taken substantially along the line 6-6 of FIG. 3.
  • FIG. 7 represents, on an enlarged scale, a sectional view taken along the line 7-7 of FIG. 3.
  • FIG. '8 represents a diagrammatic view illustrating the paths of movement through whichthe needle-bar is operated with respect to the rotary loop-taker and the needlebar actuating mechanism.
  • FIG. 9 represents a top plan view of the rotary looptaker with its internal mechanisms removed therefrom.
  • a vertically disposed hollow standard 7 which carries an overhanging bracket-arm 8 terminating in a hollow head 9 in which is mounted a reciprocatory needle-bar 10 and resser-bar 11.
  • the upper part of the bracket-arm 8 is closed by a cover-plate 12 held in place by screws not herein shown.
  • a main driving shaft 13 disposed within and lengthwise 0f the over-hanging bracket arm 8 is journaled in bearings 14 and 15 (see FIGS. 2 and 3) which are secured in the sewing machine frame forming a part of the bracketarm 8.
  • the arm standard end of the shaft 13 is connected with a hand wheel 16 in a manner which is best disclosed in US. Patent No. 2,617,375, dated November 11, 1952.
  • a gear 17 Also secured to the main shaft 13 in a manner as is disclosed in the above noted patent is a gear 17.
  • a looptaker actuating shaft is disposed within the base of the machine and is driven by the main shaft 13 through bevel gears 21 and 22, and shaft 23.
  • a pair of actuating eccentrics 26 and 27 are formed integral with the gear 21 and the combination is held in place upon the shaft 13 by a set screw 28.
  • the eccentrics 26 and 27 actuate pitmans 29 and 30 respectively, and these in turn actuate rock-shafts 31 and 32 (see FIG. 5) in a conventional manner.
  • rock-shafts 31 and 32 impart the usual feeding movements to a conventional feed-dog 33 by way of a feed-bar '34 which is connected with the shafts 31 and 32 by cranks 35 and 36 of which the latter is connected to the bar 34 by means of a link 37.
  • the arm standard 7 is especially designed to provide adequate space for housing sewing machine parts. Tothis end, the arm standard is made in substantially the shape of a pyramid, the lower portion of the standard being larger than the upper portion. Within the lower portion of the standard is provided a housing generally designated by the numeral 38 in which is mounted a vertically disposed electric motor 39. As is best disclosed in the above noted Patent No. 2,617,375, the arm standard 7 of the present machine is provided with a hollow cylindrical wall portion 41) for receiving the extended distal end of the motor drive shaft, the upper portion of which is designated by the numeral 41 and is illustrated in FIG. 3.
  • This distal end portidn 4d of the main shaft carries a spiral gear 42 which meshes with the gear 17 carried by the main shaft 13 for the purpose of driving the main shaft 13. From this, it is to be understood that the motor 39 functions to-drive the main shaft 13 which, through the medium of the upright shaft 23 and the pitmans 29 and 30, actuates the lower rotary shaft, as well as the feed rock-shafts 31 and 32.
  • the present machine' is provided with a conventional form of stitch-length control lever 45 which projects into the hollow standard 7 and is pivotally mounted therein upon a pivot pin 46 and 'is formed with a guideway 47 which is tracked by a pin 48 carried by the pitman 29.
  • a pin 48 carried by the pitman 29.
  • Cooperatconventional type of presser-foot 51 which cooperates with a throat-plate 52 and the feed-dog 33 in the feeding of the work over the work-support 1 and away from the operator.
  • the throat-plate 52 is carried by the worksupport 1.
  • the open end of the head 9 is covered over by means of a face-plate 53 which is hinged to the rear portion of the frame 9 by means of vertical pins 54, 54 (see FIGS. 3 and 5), whereby the plate 53 may be grasped by an ear 55 and swung back and forth from an opened to a closed position thereby to provide access to the internal portion of the head 9.
  • the forward end portion of the main shaft 13 extends in the conventional manner into the hollow head 9 for the pgrpose of reciprocating the needle-thread take-up arm 5
  • an intermediate portion of the cover-plate 12 is provided with an opening 57 which is normally closed by a plate 58 which is hinged in a manner not herein shown at its rearward portion thereby to permit the operator to gain access to the internal portion of the machine for purposes which will hereinafter be described.
  • the machine in accordance with the present invention, comprises a zigzag type of needle-bar which is adapted, in addition to being reciprocated in a direction of its length, to be periodically shifted back and forth laterally of the direction of work feed to produce in cooperation with the rotary loop-taker zigzag stitches.
  • the machine is provided with a group of stacked or nested cams 59 which are rotated in synchronism with the movements of the needle-bar, a pair of cam followers 60 and 61 which are adapted to track various combinations of the cams, and means 62 and 63 for integrating the movements of the two cam followers and for transferring such integrated movements to the needle-bar mechanism for the purpose of moving it back and forth laterally of the direction of needle feed.
  • the present machine may be provided with operator-influenced means 64 and 65 for shifting the cam followers thereby to permit the operator to select various cams for the purpose of effecting different patterns of movement of the needle-bar.
  • each of the cams of the group of cams 59 is different from its associate cams so that each cam in effect represents a different pattern of ornamental stitch movement of the needle-bar.
  • various cams may be selected to operate simultaneously to the end that a great, variety of ornamental stitches may be performed with the present mechanism.
  • the hollow head portion 9 of the present sewing machine is provided with an upright needle-bar 10 which is adapted to be reciprocated endwise of itself, as well as to be laterally shifted in a direction substantially at right angles to the direction of work feed.
  • the needle-bar 10 is normally disposed with its longitudinal axis forming an angle of about eleven degrees with the vertical so that the eye-pointed needle 50 will be presented toward the operator thereby to improve the visibility of the operator in the stitching area.
  • the lower portion of the needle-bar 10 is slidingly mounted within a bore 66 of a bearing element, the upper portion 67 of which is formed substantially in the shape of a ball or sphere while the lower portion 68 is formed as a right cylinder.
  • the frame portion 69 of the head 9 is provided with a bore 70 in which is slidingly mounted two spherical socket seats 71 and 72 in which the spherical bearing 67 is mated in a manner as is best disclosed in FIGS. 6 and 8.
  • a firm seat is provided for the bearing 67 by urging the spherical seat portions 71 and 72 together by means of a sleeve 73 which is threaded within the bore 70 of the frame 69. Whenever the sleeve 73 is properly seated it may be locked in position by means of a set screw 74. It is to be particularly noted that the right cylindrical portion 68 of the needle-bar bearing does not engage the sleeve 73 and, thus, the bearing 67 may be rocked back and forth in the manner of a universal joint within the bearing seats 71 and 72. Also, the needle-bar 10 may be reciprocated vertically within the spherical bearing 67.
  • the upper portion of the needle-bar 10 is slidingly mounted within a second hearing which comprises an upper portion in the form of a ball or sphere 75 having a lower portion shaped as a right circular cylinder 76.
  • the spherical bearing 75 is received within a bore 77 provided within a gate 78 which is pivotally mounted upon an upright cylindrical member 79.
  • the spherical bearing 75 rests upon a spherical seat or socket 80 formed in the lower portion of the bore 77, and the bearing 75 is maintained against this seat by a sleeve' member 81 having its lower internal portion formed with a spherical surface as at 82.
  • the sleeve 81 is maintained in intimate contact with the bearing 75 by a threaded cap 83 which is seated within the gate 78 and against the sleeve 81.
  • the threaded cap 83 is apertured as at 84 to permit the needle-bar 10 to shift laterally relative to the gate 78 in the manner of a universal joint.
  • the sleeve 81 may be locked in position by means of a set screw 85.
  • the forward portion of the main shaft 13 is provided with a conventional crank mechanism for reciprocating the needlebar 10 endwise of its length. More specifically, the end portion of the shaft 13 is provided with a crank 86 having projecting therefrom a crank pin 87 to the end portion of which is pivotally secured a link 88 of which the lower portion is provided with a bore 89 for slidably receiving therein a cylindrical pin 90 whose one end portion is provided with a pair of laterally spaced cheeks 9191. As may be best seen from FIG.
  • the cheeks 91-91 are provided with a pair of aligned apertures 92-92 for receiving therein a sleeve 93 which is provided with a central bore 94 for receiving the needle-bar 10.
  • the sleeve 93 is locked in place upon the needle-bar by means of a set screw 95 and from this it is manifest that the sleeve 93 is formed substantially as an integral part of the needlebar 10 and can rotate within the cheek apertures 9292.
  • rotation of the main shaft 13 will, through the medium of the rotary crank 86 and its associated mechanism, function to reciprocate the needle-bar 10 back and forth lengthwise of its longitudinal axis and within its upper and lower bearings 75 and 67.
  • the needle-bar 10 is adapted to be shifted laterally of the direction of work feed by means of a plurality of rotary cams 59 and a pitman member 63, of which the latter is pivotally connected to the needle-bar supporting crank or gate 78 by means of a vertical pin 96. From this it is to be understood that the endwise movements of the pitman 63 will effect an oscillaiton of the needle-bar gate 78 to the end that the upper portion of the needle-bar will be swung through an arc whose center coincides with the axis of the pivot member 79 about which the gate 78 oscillates.
  • This needle-bar action is diagrammatically illustrated in FIG.
  • the pitman 63 is diagrammatically illustrated as are also the cam followers 60 and 61, a needle bight and field selector member 99 and its associated handle 100.
  • FIG. 8 it is to be understood that with the upper spherical bearing 75 of the needle-bar 10v shifting about a path designated by the are 98 and with the lower spherical bearing 67 being bodily fixed in the lower frame portion 69, the needle 50 will be swung substantially, through a path corresponding to an arc 101; which is designed to correspond, substantially. with theaarc of movement of a loop -seizing hook 102 carried by; a,rotary loop -taker 103 mounted upon a substantially upright, shaft 104.
  • This rotary, loop;tak er is illustrated inumore detailin FIG.
  • the needle 50 is arranged to descend inside of the circular path of movement of a loop-seizing hook 102 at a location rearwardly of the loop-taker body with reference to the direction of normal work feed which is from right to left as viewed in FIG. 5. From this, it is manifest that within certain optimum limitations the needle will properly cooperate with the loop-seizing hook 102 no matter whether the needle is given endwise reciprocations or a combination of reciprocating movements and lateral sidewise movements since the needle 50 in in its lateral movements follows a path 101 which substantially coincides with the circularpath of movement of the loop-seizing hook 102.
  • FIG. 9 there is illustrated a top plan view of the rotary loop-taker 103, and cooperating with this rotary loop-taker is a needle 50 which is shown in three different positions such as its central or normal position 105, its extreme left-hand position 106, and its extreme right-hand position 107, and in each one of these positions it will properly cooperate with the loop-seizing hook beak 102 in the formation of stitches due to the fact that the needle 50 is shifted along the path as represented substantially by the arc 101.
  • the gate 78 has one end pivotally mounted about a fixed axis and its other end pivotally connected by a ball joint structure with the upper end of the needle-bar 10.
  • Means are provided for oscillating the gate about its axis thereby to swing the upper end of the needle-bar through an arc of a circle, as represented in FIG. 8 by the number 98.
  • means are provided in the form of a second ball joint structure slidably associated with an intermediate portion of the needle-bar and carried by the frame for constraining the lower end of the needlebar to swing through an arc of a circle, as represented in FIG. 8 by the number 101 which is eccentricto the other circle when such circles are projected upon the worksupporting surface 1.
  • a curved loop-taker having a loop-seizing hook circularly movable about an upright axis, a thread-case supported by said loop-taker, a holder for restraining said case from moving with said loop-taker, Work-feeding means for normally advancing the work along a straight-line horizontal path, an endwise reciprocable needle-bar, a needle carried by the lower end of said needle-bar and arranged to cooperate with said loop-taker in the formation of stitches at a location rearwardly of the loop-taker axis with reference to the direction of normal work-feed, means connected directly with and disposed behind said needlebar with reference to the normal direction of work-feed for bodily shifting said needle laterally of the direction of Work-feed, and a member connected with the last mentioned means and constraining the lower end of the needle-bar whereby the needle in its movements laterally of the direction of work-feed will trace an arc of a circle substantially concentric with the upright axis about which said loop-taker
  • a frame In a sewing machine, the combination of a frame, a substantially flat work-supporting surface formed upon the frame a curvedloop-taker circularlymovable about an upright axis and located. below the work-supporting surface, work-feeding means for normally advancing the work over. the. work-supporting surface and along a straight-line horizontal.v path, a needle-bar carried by the frame at-the. upper sideof the work-support, aneedle carried? at a. first. end. of.
  • the needle-bar means for reciprocating the needle-bar endwise of its longitudinal axis and toward and from the work-supporting surface whereby the needle will cooperate with the loop-taker in the formation of stitches, means for laterally shifting the second end of the needle-bar through an arc of a circle, and means constraining an intermediate portion of the needle-bar thereby to confine the lateral movements of the first end of the bar to an arc of a circle which is eccentric to the first circle when such circles are projected upon the work-supporting surface.
  • said third mentioned means includes a gate member connected with the second end of the needle-bar and pivoted about a fixed axis arranged at an inclination relative to the fiat work-supporting surface.
  • a frame a substantially flat work-supporting surface formed upon the frame, a curved loop-taker circularly movable about an upright axis and located below the work-supporting surface, work-feeding means for normally advancing the work over the work-supporting surface and along a straight-line horizontal path, a needle-bar carried by the frame at the upper side of the Work-supporting surface, a needle carried at a first end of the needle-bar, means for reciprocating the needle-bar endwise of its longitudinal axis and toward and from the work-supporting surface thereby to cooperate with the loop-taker in the formation of stitches, a gate having one end pivotally mounted about an axis fixed by the frame and its other end pivotally connected by a ball joint structure with the second end of the needle-bar, means for oscillating the gate about its axis thereby to swing the second end of the needle-bar through an arc of a circle, and means including a ball joint structure slidably associated with an intermediate portion of
  • a curved loop-taker having a loop seizing hook circularly movable about an upright axis, a thread-case supported by said loop-taker, a holder for restraining said case from moving with said loop-taker, work-feeding means for normally advancing the work along a straight-line horizontal path, an endwise reciprocable needle-bar, a needle carried by the lower end of said needle-bar and arranged to cooperate with said loop-taker in the formation of stitches at a location rearwardly of the loop-taker axis with reference to the direction of normal work-feed, means comprising a gate member connected with the upper end of said needle-bar and pivotally mounted about a fixed axis disposed behind said needle-bar with reference to the normal direction of work-feed thereby to swing the upper end of said needle-bar about said gate axis, and means constraining an intermediate portion of said needle-bar thereby to confine the lateral movements of said needle to an arc of a circle which is substantially concentric

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  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Description

June 20, 1961 R. E. JOHNSON SEWING MACHINES 5 Sheets-Sheet 1 Original Filed Nov. 29. 1954 INVENTOR. Ralph E. Johnson ATTORNEY June 20, 1961 Original Filed Nov. 29. 1954 R. E. JOHNSON SEWING MACHINES 5 Sheets-Sheet 2 Fig.2.
INVENTOR. Ralph E. Johnson BY ATTORNEY June 20, 1961 R. E. JOHNSON SEWING MACHINES 5 Sheets-Sheet 3 Original Filed Nov. 29. 1954 INVENTOR. Ralph E. Johnson ATTORNEY June 20, 1961 R. E. JOHNSON SEWING MACHINES 5 Sheets-Sheet 4 Original Filed Nov. 29. 1954 INVENTOR. Ralph E. Johnson ATTORNEY Fig.5.
June 20, 1961 R. E. JOHNSON SEWING MACHINES 5 Sheets-Sheet 5 Original Filed Nov. 29. 1954 ml l l I l l l I l E i 1.. L
uvmvrox. Ralph E. Johnson fl/ ATTORNEY United States Patent 2,989,016 SEWING MACHINES Ralph E. Johnson, Mountainside, N.J., assignor to The Singer Manufacturing Company, Elizabeth, N.J., a corporation of New Jersey Original application Nov. 29, 1954, Ser. No. 471,766, now Patent No. 2,862,468, dated Dec. 2, 1958. Divided and this application Jan. 17, 1957, Ser. No.
9 Claims. (Cl. 112-158) This invention relates to improvements in sewing machines and more particularly to sewing machines of the ornamental stitch variety in which the needle-bar is adapted to be reciprocated endwise of itself at the same time that it is shifted laterally of the direction of work feed.
It is a primary object of the present invention to provide'a sewing machine with an ornamental stitch sewing mechanism including vertical axis rotary loop-taker and reciprocatory needle-bar mechanisms which cooperate together in the formation of zigzag lock stitches.
A more specific object of the present invention is to provide a sewing machine which employs a vertical axis rotary loop-taker with a needle-barmechanisrn of the type wherein the needle-bar is reciprocated in a path which extends within the confines of the loop-taker and at the readily understood by those skilled in the art.
In the drawings:
FIG. 1 represents a front perspective view of a sewing machine in which the present invention is embodied.
FIG. 2 represents a side elevational view in axial cross section of the sewing machine illustrated in FIG. 1.
FIG. 3 represents a top plan view of the sewing machine disclosed in FIG. 1 with the cover plate removed therefrom.
FIG. 4 represents a fragmentary elevational view of the actuating drive for the needle-bar.
FIG. 5 represents a sectional view taken substantially on the line 5-5 of FIG. 2.
FIG. 6 represents a sectional view of the machine taken substantially along the line 6-6 of FIG. 3.
FIG. 7 represents, on an enlarged scale, a sectional view taken along the line 7-7 of FIG. 3.
FIG. '8 represents a diagrammatic view illustrating the paths of movement through whichthe needle-bar is operated with respect to the rotary loop-taker and the needlebar actuating mechanism.
FIG. 9 represents a top plan view of the rotary looptaker with its internal mechanisms removed therefrom.
The following detailed description relates to a sewing machine of the type disclosed in my copending application .machine in which the present invention .is incorporated comprises a substantially rectangular shaped base 1 forming at its upper side a work-supporting surface or bed plate and provided .at its under side with a plurality of downwardly extending side walls 2-2 and end walls 3-3 forming a box-like enclosure, the downwardly facing opening of which is normally closed by a bottom cover ice plate 4 held in place by a thumb nut 5 threaded over a stud 6 extending downwardly from the under face of the base 1.
Suitably secured upon the hollow bed 1 is a vertically disposed hollow standard 7 which carries an overhanging bracket-arm 8 terminating in a hollow head 9 in which is mounted a reciprocatory needle-bar 10 and resser-bar 11. The upper part of the bracket-arm 8 is closed by a cover-plate 12 held in place by screws not herein shown. A main driving shaft 13 disposed within and lengthwise 0f the over-hanging bracket arm 8 is journaled in bearings 14 and 15 (see FIGS. 2 and 3) which are secured in the sewing machine frame forming a part of the bracketarm 8. The arm standard end of the shaft 13 is connected with a hand wheel 16 in a manner which is best disclosed in US. Patent No. 2,617,375, dated November 11, 1952.
Also secured to the main shaft 13 in a manner as is disclosed in the above noted patent is a gear 17. The main shaft 13, as is hereinafter described in more detail, drives the needle-bar 10 carried in the head 9. A looptaker actuating shaft, not herein shown, is disposed within the base of the machine and is driven by the main shaft 13 through bevel gears 21 and 22, and shaft 23. A pair of actuating eccentrics 26 and 27 are formed integral with the gear 21 and the combination is held in place upon the shaft 13 by a set screw 28. The eccentrics 26 and 27 actuate pitmans 29 and 30 respectively, and these in turn actuate rock-shafts 31 and 32 (see FIG. 5) in a conventional manner. These rock- shafts 31 and 32 impart the usual feeding movements to a conventional feed-dog 33 by way of a feed-bar '34 which is connected with the shafts 31 and 32 by cranks 35 and 36 of which the latter is connected to the bar 34 by means of a link 37.
The arm standard 7 is especially designed to provide adequate space for housing sewing machine parts. Tothis end, the arm standard is made in substantially the shape of a pyramid, the lower portion of the standard being larger than the upper portion. Within the lower portion of the standard is provided a housing generally designated by the numeral 38 in which is mounted a vertically disposed electric motor 39. As is best disclosed in the above noted Patent No. 2,617,375, the arm standard 7 of the present machine is provided with a hollow cylindrical wall portion 41) for receiving the extended distal end of the motor drive shaft, the upper portion of which is designated by the numeral 41 and is illustrated in FIG. 3. This distal end portidn 4d of the main shaft carries a spiral gear 42 which meshes with the gear 17 carried by the main shaft 13 for the purpose of driving the main shaft 13. From this, it is to be understood that the motor 39 functions to-drive the main shaft 13 which, through the medium of the upright shaft 23 and the pitmans 29 and 30, actuates the lower rotary shaft, as well as the feed rock- shafts 31 and 32.
As may be best seen in FIG. 1, the present machine'is provided with a conventional form of stitch-length control lever 45 which projects into the hollow standard 7 and is pivotally mounted therein upon a pivot pin 46 and 'is formed with a guideway 47 which is tracked by a pin 48 carried by the pitman 29. Thus, as the lever 45 is shifted about the pin 46, it will lengthen or shorten the eifective throw of the feeding mechanism or reverse the action thereof, all in a manner which is well known. Cooperatconventional type of presser-foot 51 which cooperates with a throat-plate 52 and the feed-dog 33 in the feeding of the work over the work-support 1 and away from the operator. The throat-plate 52 is carried by the worksupport 1.
Referring particularly to FIGS. 1, 2 and 3, the open end of the head 9 is covered over by means of a face-plate 53 which is hinged to the rear portion of the frame 9 by means of vertical pins 54, 54 (see FIGS. 3 and 5), whereby the plate 53 may be grasped by an ear 55 and swung back and forth from an opened to a closed position thereby to provide access to the internal portion of the head 9.
The forward end portion of the main shaft 13 extends in the conventional manner into the hollow head 9 for the pgrpose of reciprocating the needle-thread take-up arm 5 Referring particularly to FIGS. 1 and 2, an intermediate portion of the cover-plate 12 is provided with an opening 57 which is normally closed by a plate 58 which is hinged in a manner not herein shown at its rearward portion thereby to permit the operator to gain access to the internal portion of the machine for purposes which will hereinafter be described.
The machine, in accordance with the present invention, comprises a zigzag type of needle-bar which is adapted, in addition to being reciprocated in a direction of its length, to be periodically shifted back and forth laterally of the direction of work feed to produce in cooperation with the rotary loop-taker zigzag stitches. In accordance with one form of the present invention, the machine is provided with a group of stacked or nested cams 59 which are rotated in synchronism with the movements of the needle-bar, a pair of cam followers 60 and 61 which are adapted to track various combinations of the cams, and means 62 and 63 for integrating the movements of the two cam followers and for transferring such integrated movements to the needle-bar mechanism for the purpose of moving it back and forth laterally of the direction of needle feed. Also, the present machine may be provided with operator-influenced means 64 and 65 for shifting the cam followers thereby to permit the operator to select various cams for the purpose of effecting different patterns of movement of the needle-bar. It is to be particularly understood that each of the cams of the group of cams 59 is different from its associate cams so that each cam in effect represents a different pattern of ornamental stitch movement of the needle-bar. In this connection, it is to be further appreciated that with two cam followers 60 and 61 various cams may be selected to operate simultaneously to the end that a great, variety of ornamental stitches may be performed with the present mechanism.
As hereinabove noted, the hollow head portion 9 of the present sewing machine is provided with an upright needle-bar 10 which is adapted to be reciprocated endwise of itself, as well as to be laterally shifted in a direction substantially at right angles to the direction of work feed. Referring particularly to FIGS. 4, 5, 6, 7 and 8, the needle-bar 10 is normally disposed with its longitudinal axis forming an angle of about eleven degrees with the vertical so that the eye-pointed needle 50 will be presented toward the operator thereby to improve the visibility of the operator in the stitching area. More specifically, the lower portion of the needle-bar 10 is slidingly mounted within a bore 66 of a bearing element, the upper portion 67 of which is formed substantially in the shape of a ball or sphere while the lower portion 68 is formed as a right cylinder. In order to form a seat for the ball 67, the frame portion 69 of the head 9 is provided with a bore 70 in which is slidingly mounted two spherical socket seats 71 and 72 in which the spherical bearing 67 is mated in a manner as is best disclosed in FIGS. 6 and 8. A firm seat is provided for the bearing 67 by urging the spherical seat portions 71 and 72 together by means of a sleeve 73 which is threaded within the bore 70 of the frame 69. Whenever the sleeve 73 is properly seated it may be locked in position by means of a set screw 74. It is to be particularly noted that the right cylindrical portion 68 of the needle-bar bearing does not engage the sleeve 73 and, thus, the bearing 67 may be rocked back and forth in the manner of a universal joint within the bearing seats 71 and 72. Also, the needle-bar 10 may be reciprocated vertically within the spherical bearing 67.
The upper portion of the needle-bar 10 is slidingly mounted within a second hearing which comprises an upper portion in the form of a ball or sphere 75 having a lower portion shaped as a right circular cylinder 76. The spherical bearing 75 is received within a bore 77 provided within a gate 78 which is pivotally mounted upon an upright cylindrical member 79. The spherical bearing 75 rests upon a spherical seat or socket 80 formed in the lower portion of the bore 77, and the bearing 75 is maintained against this seat by a sleeve' member 81 having its lower internal portion formed with a spherical surface as at 82. The sleeve 81 is maintained in intimate contact with the bearing 75 by a threaded cap 83 which is seated within the gate 78 and against the sleeve 81. The threaded cap 83 is apertured as at 84 to permit the needle-bar 10 to shift laterally relative to the gate 78 in the manner of a universal joint. As is best disclosed in FIG. 6, the sleeve 81 may be locked in position by means of a set screw 85.
Referring particularly to FIGS. 2, 4, 5 and 6, the forward portion of the main shaft 13 is provided with a conventional crank mechanism for reciprocating the needlebar 10 endwise of its length. More specifically, the end portion of the shaft 13 is provided with a crank 86 having projecting therefrom a crank pin 87 to the end portion of which is pivotally secured a link 88 of which the lower portion is provided with a bore 89 for slidably receiving therein a cylindrical pin 90 whose one end portion is provided with a pair of laterally spaced cheeks 9191. As may be best seen from FIG. 7, the cheeks 91-91 are provided with a pair of aligned apertures 92-92 for receiving therein a sleeve 93 which is provided with a central bore 94 for receiving the needle-bar 10. The sleeve 93 is locked in place upon the needle-bar by means of a set screw 95 and from this it is manifest that the sleeve 93 is formed substantially as an integral part of the needlebar 10 and can rotate within the cheek apertures 9292.
Thus, rotation of the main shaft 13 will, through the medium of the rotary crank 86 and its associated mechanism, function to reciprocate the needle-bar 10 back and forth lengthwise of its longitudinal axis and within its upper and lower bearings 75 and 67.
As hereinabove described, the needle-bar 10 is adapted to be shifted laterally of the direction of work feed by means of a plurality of rotary cams 59 and a pitman member 63, of which the latter is pivotally connected to the needle-bar supporting crank or gate 78 by means of a vertical pin 96. From this it is to be understood that the endwise movements of the pitman 63 will effect an oscillaiton of the needle-bar gate 78 to the end that the upper portion of the needle-bar will be swung through an arc whose center coincides with the axis of the pivot member 79 about which the gate 78 oscillates. This needle-bar action is diagrammatically illustrated in FIG. 8, wherein the axis of oscillation of the gate 78 is represented by the line 96. The dotted are 97 represents the path of movement taken by the axis of the pin 96 while the are 98 represents the path of movement traversed by the upper cylindrical bearing 75 of the needle-bar 10. By the same token, the pitman 63 is diagrammatically illustrated as are also the cam followers 60 and 61, a needle bight and field selector member 99 and its associated handle 100.
Still referring to FIG. 8, it is to be understood that with the upper spherical bearing 75 of the needle-bar 10v shifting about a path designated by the are 98 and with the lower spherical bearing 67 being bodily fixed in the lower frame portion 69, the needle 50 will be swung substantially, through a path corresponding to an arc 101; which is designed to correspond, substantially. with theaarc of movement of a loop -seizing hook 102 carried by; a,rotary loop -taker 103 mounted upon a substantially upright, shaft 104. This rotary, loop;tak er is illustrated inumore detailin FIG. 5 and itgis tobe particularly; observed that the needle 50 is arranged to descend inside of the circular path of movement of a loop-seizing hook 102 at a location rearwardly of the loop-taker body with reference to the direction of normal work feed which is from right to left as viewed in FIG. 5. From this, it is manifest that within certain optimum limitations the needle will properly cooperate with the loop-seizing hook 102 no matter whether the needle is given endwise reciprocations or a combination of reciprocating movements and lateral sidewise movements since the needle 50 in in its lateral movements follows a path 101 which substantially coincides with the circularpath of movement of the loop-seizing hook 102.
Referring particularly to FIG. 9, there is illustrated a top plan view of the rotary loop-taker 103, and cooperating with this rotary loop-taker is a needle 50 which is shown in three different positions such as its central or normal position 105, its extreme left-hand position 106, and its extreme right-hand position 107, and in each one of these positions it will properly cooperate with the loop-seizing hook beak 102 in the formation of stitches due to the fact that the needle 50 is shifted along the path as represented substantially by the arc 101.
Thus, the gate 78 has one end pivotally mounted about a fixed axis and its other end pivotally connected by a ball joint structure with the upper end of the needle-bar 10. Means are provided for oscillating the gate about its axis thereby to swing the upper end of the needle-bar through an arc of a circle, as represented in FIG. 8 by the number 98. Also, means are provided in the form of a second ball joint structure slidably associated with an intermediate portion of the needle-bar and carried by the frame for constraining the lower end of the needlebar to swing through an arc of a circle, as represented in FIG. 8 by the number 101 which is eccentricto the other circle when such circles are projected upon the worksupporting surface 1.
Having thus set forth the nature of the invention, what I claim herein is:
1. In a sewing machine, the combination of a curved loop-taker having a loop-seizing hook circularly movable about an upright axis, a thread-case supported by said loop-taker, a holder for restraining said case from moving with said loop-taker, Work-feeding means for normally advancing the work along a straight-line horizontal path, an endwise reciprocable needle-bar, a needle carried by the lower end of said needle-bar and arranged to cooperate with said loop-taker in the formation of stitches at a location rearwardly of the loop-taker axis with reference to the direction of normal work-feed, means connected directly with and disposed behind said needlebar with reference to the normal direction of work-feed for bodily shifting said needle laterally of the direction of Work-feed, and a member connected with the last mentioned means and constraining the lower end of the needle-bar whereby the needle in its movements laterally of the direction of work-feed will trace an arc of a circle substantially concentric with the upright axis about which said loop-taker moves.
2. A sewing machine as claimed in claim 1, in which said needle is arranged to descend inside of the circular path of movement of said loop-seizing hook.
3. A sewing machine as claimed in claim 1, in which said last mentioned means .includes a gate member connected with said needle-bar and pivotally mounted about a fixed axis disposed behind said needle-bar with reference to the normal direction of work-feed.
4. In a sewing machine, the combination of a frame, a substantially flat work-supporting surface formed upon the frame a curvedloop-taker circularlymovable about an upright axis and located. below the work-supporting surface, work-feeding means for normally advancing the work over. the. work-supporting surface and along a straight-line horizontal.v path, a needle-bar carried by the frame at-the. upper sideof the work-support, aneedle carried? at a. first. end. of. the needle-bar, means for reciprocating the needle-bar endwise of its longitudinal axis and toward and from the work-supporting surface whereby the needle will cooperate with the loop-taker in the formation of stitches, means for laterally shifting the second end of the needle-bar through an arc of a circle, and means constraining an intermediate portion of the needle-bar thereby to confine the lateral movements of the first end of the bar to an arc of a circle which is eccentric to the first circle when such circles are projected upon the work-supporting surface.
5. A sewing machine as claimed in claim 4 in which said last mentioned means includes a ball and socket joint structure.
6. A sewing machine as claimed in claim 4 in which said third mentioned means includes a gate member connected with the second end of the needle-bar and pivoted about a fixed axis.
7. A sewing machine as claimed in claim 4 in which said third mentioned means includes a gate member connected with the second end of the needle-bar and pivoted about a fixed axis arranged at an inclination relative to the fiat work-supporting surface.
8. In a sewing machine, the combination of a frame, a substantially flat work-supporting surface formed upon the frame, a curved loop-taker circularly movable about an upright axis and located below the work-supporting surface, work-feeding means for normally advancing the work over the work-supporting surface and along a straight-line horizontal path, a needle-bar carried by the frame at the upper side of the Work-supporting surface, a needle carried at a first end of the needle-bar, means for reciprocating the needle-bar endwise of its longitudinal axis and toward and from the work-supporting surface thereby to cooperate with the loop-taker in the formation of stitches, a gate having one end pivotally mounted about an axis fixed by the frame and its other end pivotally connected by a ball joint structure with the second end of the needle-bar, means for oscillating the gate about its axis thereby to swing the second end of the needle-bar through an arc of a circle, and means including a ball joint structure slidably associated with an intermediate portion of the needle-bar and carried by the frame for constraining the first end of the needlebar to swing through an arc of a circle which is eccentric to the first mentioned circle when such circles are projected upon the work-supporting surface.
9. In a sewing machine, the combination of a curved loop-taker having a loop seizing hook circularly movable about an upright axis, a thread-case supported by said loop-taker, a holder for restraining said case from moving with said loop-taker, work-feeding means for normally advancing the work along a straight-line horizontal path, an endwise reciprocable needle-bar, a needle carried by the lower end of said needle-bar and arranged to cooperate with said loop-taker in the formation of stitches at a location rearwardly of the loop-taker axis with reference to the direction of normal work-feed, means comprising a gate member connected with the upper end of said needle-bar and pivotally mounted about a fixed axis disposed behind said needle-bar with reference to the normal direction of work-feed thereby to swing the upper end of said needle-bar about said gate axis, and means constraining an intermediate portion of said needle-bar thereby to confine the lateral movements of said needle to an arc of a circle which is substantially concentric with the upright axis about which said looptaker moves.
(References on following p g .4
References Cited in the file of this patent UNITED STATES PATENTS Diehl et a1; 'July 23, 1901 Jacob et a1. Feb. 26, 1907 Hemleb Aug. 3, 1915 5 Hughes Mar. 10, 1925 8 Greenwood Jan. 15, 1929 Schweiger n Jan. 14, 1936 Ebert Apr. 26, 1938 Parry 'Dec. 15, 1953 Casas-Robert et a1. July 6, 1954 Scott et a1 July 17, 1956
US634719A 1951-10-05 1957-01-17 Sewing machines Expired - Lifetime US2989016A (en)

Priority Applications (35)

Application Number Priority Date Filing Date Title
NL123695D NL123695C (en) 1954-11-29
NL202427D NL202427A (en) 1954-11-29
DENDAT1302984D DE1302984B (en) 1954-11-29
NL106140D NL106140C (en) 1954-11-29
NL291738D NL291738A (en) 1954-11-29
US249872A US2662468A (en) 1951-10-05 1951-10-05 Bundling machine
DES46453A DE1222772B (en) 1954-11-29 1955-11-23 Zigzag sewing machines with automatic decorative stitches
DES53145A DE1140055B (en) 1954-11-29 1955-11-23 Sewing machine with a needle clamp carried by the needle bar and provided with a clamping screw
DES53143A DE1092286B (en) 1954-11-29 1955-11-23 Sewing machine
GB21178/57A GB808356A (en) 1954-11-29 1955-11-24 Sewing machine
GB4204/58A GB808357A (en) 1954-11-29 1955-11-24 Improvements in ornamental stitch sewing machines
GB20635/57A GB808355A (en) 1954-11-29 1955-11-24 Needle-bar driving means for ornamental stitch sewing machine
GB18369/57A GB808352A (en) 1954-11-29 1955-11-24 Sewing machine needle-clamp
GB20270/57A GB808353A (en) 1954-11-29 1955-11-24 Sewing machine stitch forming devices
GB21177/57A GB809217A (en) 1954-11-29 1955-11-24 Thread retainer for ornamental stitch sewing machine
GB33690/55A GB808351A (en) 1954-11-29 1955-11-24 Ornamental stitch sewing machine
GB20460/57A GB808354A (en) 1954-11-29 1955-11-24 Sewing machine loop-taker
CH340123D CH340123A (en) 1954-11-29 1955-11-29 Zigzag sewing machine
CH339479D CH339479A (en) 1954-11-29 1955-11-29 Lockstitch sewing machine
FR1138940D FR1138940A (en) 1954-11-29 1955-11-29 Ornamental stitch sewing machine
CH356658D CH356658A (en) 1954-11-29 1955-11-29 Sewing machine with a needle bar and a needle clamp
CH340694D CH340694A (en) 1954-11-29 1955-11-29 Sewing machine with rotating hook
CH340125D CH340125A (en) 1954-11-29 1955-11-29 Zigzag sewing machine
CH340695D CH340695A (en) 1954-11-29 1955-11-29 Gripper device on a sewing machine
CH339481D CH339481A (en) 1954-11-29 1955-11-29 sewing machine
US591718A US2848963A (en) 1954-11-29 1956-06-15 Means facilitating the control and operation of ornamental stitch sewing machines
US626908A US2973733A (en) 1954-11-29 1956-12-07 Needle clamp for sewing machines
US627189A US2920593A (en) 1954-11-29 1956-12-10 Sewing machine throat-plate mechanisms
US627878A US2900940A (en) 1954-11-29 1956-12-12 Sewing machines with bobbin thread controlling means
US634719A US2989016A (en) 1954-11-29 1957-01-17 Sewing machines
US634755A US2921545A (en) 1954-11-29 1957-01-17 Sewing machine presser bar mechanisms
US634904A US2966130A (en) 1954-11-29 1957-01-18 Sewing machine and loop-taker mechanisms therefor
GB18656/57A GB834842A (en) 1954-11-29 1957-06-13 Means facilitating the control and operation of ornamental stitch sewing machines
FR72108D FR72108E (en) 1954-11-29 1957-06-13 Ornamental stitch sewing machine
CH345791D CH345791A (en) 1954-11-29 1957-06-14 Zigzag sewing machine

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US471766A US2862468A (en) 1954-11-29 1954-11-29 Ornamental stitch sewing machines
US834842XA 1956-06-15 1956-06-15
US626908A US2973733A (en) 1954-11-29 1956-12-07 Needle clamp for sewing machines
US627189A US2920593A (en) 1954-11-29 1956-12-10 Sewing machine throat-plate mechanisms
US634719A US2989016A (en) 1954-11-29 1957-01-17 Sewing machines
US634904A US2966130A (en) 1954-11-29 1957-01-18 Sewing machine and loop-taker mechanisms therefor

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US2989016A true US2989016A (en) 1961-06-20

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US626908A Expired - Lifetime US2973733A (en) 1951-10-05 1956-12-07 Needle clamp for sewing machines
US627189A Expired - Lifetime US2920593A (en) 1951-10-05 1956-12-10 Sewing machine throat-plate mechanisms
US634719A Expired - Lifetime US2989016A (en) 1951-10-05 1957-01-17 Sewing machines
US634904A Expired - Lifetime US2966130A (en) 1951-10-05 1957-01-18 Sewing machine and loop-taker mechanisms therefor

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US626908A Expired - Lifetime US2973733A (en) 1951-10-05 1956-12-07 Needle clamp for sewing machines
US627189A Expired - Lifetime US2920593A (en) 1951-10-05 1956-12-10 Sewing machine throat-plate mechanisms

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US634904A Expired - Lifetime US2966130A (en) 1951-10-05 1957-01-18 Sewing machine and loop-taker mechanisms therefor

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US (4) US2973733A (en)
CH (8) CH339479A (en)
DE (4) DE1140055B (en)
FR (2) FR1138940A (en)
GB (9) GB808352A (en)
NL (4) NL123695C (en)

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Publication number Publication date
FR72108E (en) 1960-08-05
GB808357A (en) 1959-02-04
NL291738A (en)
GB808351A (en) 1959-02-04
NL106140C (en)
GB834842A (en) 1960-05-11
NL123695C (en)
CH340123A (en) 1959-07-31
US2966130A (en) 1960-12-27
CH339481A (en) 1959-06-30
DE1222772B (en) 1966-08-11
GB808354A (en) 1959-02-04
DE1140055B (en) 1962-11-22
CH340694A (en) 1959-08-31
NL202427A (en)
FR1138940A (en) 1957-06-21
GB808353A (en) 1959-02-04
CH340125A (en) 1959-07-31
CH339479A (en) 1959-06-30
US2973733A (en) 1961-03-07
US2920593A (en) 1960-01-12
GB808352A (en) 1959-02-04
GB808355A (en) 1959-02-04
CH340695A (en) 1959-10-15
DE1302984B (en) 1971-01-21
GB809217A (en) 1959-02-18
CH356658A (en) 1961-08-31
DE1092286B (en) 1960-11-03
CH345791A (en) 1960-04-15
GB808356A (en) 1959-02-04

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