US783701A - Stop mechanism for sewing-machines. - Google Patents

Description

PATENTED FEB. 28, 1905.

D. MIL-LS.

STOP MECHANISM FOR SEWING MACHINES.

APPLIGATIOH FILED AUG. 29.19100 6 SHEETSBHEBT 1 iiiiiiiiiiiiiiiumr m m MW m mu um w M +I Du Q Vimcooco 490. iz. A W

PATBNTED FEB. 28, 1905.

D. MILLS.

STOP MECHANISM FOR SEWING MAGHINES.

APPLICATION FILED AUG. 29.1900.

6 SHEETS-SHEET 2.

w 15 AW% No. 788,701. PATENTED FEB. 28, 1905. D. MILLS.

STOP MEGHANISM-FOR SEWING MACHINES APPLIOATION FILED AUG. 29,1900.

6 SHEETS-SHEET 3.

Q/Wtmeooao No. 783,701. PATENTED FEB. 28, 1905. D. MILLS.

STOP MECHANISM FOR SEWING MACHINES,

APPLICATION FILED AUG. 29.1900.

6 SHEETS-SHEET 4.

PATENTED FEB. 28, 1905.

1). MILLS. STOP MECHANISM FOR SEWING MACHINES.

MW-masses: @901 Ma; 0 5,, 23M.

PATENTED FEB. 28, 1905.

D. MILLS.

STOP MECHANISM FOR SEWING MACHINES.

APPLICATION FILED AUG. 29,1900.

6 SHEETS-SHEET 6.

3 vw MlIoz m W wvitmeooao: %wi Mtg/(71W 45. AM,

life. ?83,701.

"i ATS Patented February 24%, 1905,.

DANIEL MILLS, OF PHILADELPHIA, PENNlEiYLVANIA, ASEHGNOR TO STANDARD SEWING MACHINE COMPANY, O1 CLEVELAND, OHIO,

A CORPORATION OF OHIO.

STOP lt lECt-lANlSNl FOR SEWlNWl/ tt3l-lll lli= '4%.

SPECIFICATION forming part of Letters Patent No. 783,701, dated February 28, 1905.

Application filed August 29,1900, Serial lilo. 28,395.

To all whont it may concern:

Be it known that I, DANInL lVIILLS, a citizen of the United States, and a resident of Philadelphia, in the Statc of Pennsylvania, have invented certain new and useful Improvements in Stop Mechanism for Sewing-lVlachines, of which the following is a specification, referen ce being bad to the accompanying drawings, forming part thereof.

This invention relates to that class of sewinganachines provided with a mechanism for automatically stopping the machine after a certainpredetermined number of stitches have been made; and it consists of improvements upon the stop mechanism disclosed in Letters Patent No. 635.267, granted to me October 11, 1899. In said prior patent the buttonholesewing machine therein disclosed is provided with a fast pulley on the driving-shaft and. a stop mechanism for engaging With said pulley to stop the same, and thereby the machine, at a certain predetermined time, the said stop mechanism being automatically operated and controlled from a member of the work-holderfeeding mechanism lJlI'I'OHgl] the medium of suitable operative connections. In order to reduce to a minimum the jar or strain upon the machine when the same is brought to a stop by the action of the stop mechanism, a means is also provided for throwing off the power in advance of the action of the latter, so that the momentum of the machine, which is suflicicnt to complete the determined number of stitches, Will be so reduced that the positive stopping of the machine by the stop mechanism may be accomplished without undue jar or strain, it being understood that the throw oil of the power is regulated to take place a greater or less number of stitches prior to the completion of the buttonhole, according to the speed of the machine. In the event of any change of adjustment in the feeding movement of the work-holder, however,

whereby a greater or less number of stitches are caused to be taken in a given length of buttonhole, it has heretofore been necessary, as in my said prior patent, to make a further and independent adjustment to the powerthrow-olf-controlling mechanism in order to have the throw oil of the power take place at the same number of stitches prior to the completion of the buttonhole as before, as it will be understood that the speed of the machine being the same the power should he thrmvn olf the same number 0 f stitches (or revolutions of the driving-shaft) prior to the completion of the buttonhole and the action of the stop mechanism independent of the number of stitches made in the l)l1tt()llll0l(3. "For ii'istance, if the Work-holder-feeding mechanism is :uljusted to provide a certain number of stitches for a certain length of buttonhole the powerthrow-olf mechanisnii controlled from one of the moving parts of said feeding mechanism is regulated to throw oil the power a certain determined number of stitches prior to the completion of the buttonlmle, accord ing to the speed of the machine. Then if it is desired to double the number of stitches for the same length of buttonholc such change is secured by adjusting the feeding nmchanism whereby the WOl'kllOlLlGl' and certain of its actuating parts will be caused to move at only one-hal l the former rate of specthand consequently the stop and power-throwoll mechanisms being actuated and controlled from said feeding mechanism such reduced speed permits just doub e the number of stitches to be taken beta-r.K r

the time the power is thrown olf and the stopping of the machine by the stop mechanism. 'Iherefore it becomes necessary in order that the power may be thrown oil prior to the ac tion of the stop mechanism the same number of stitches as before to make another and independent adjustment to the throw-oil? mechanism.

To make such imlepenrlent iuljustments as above referred to occupies considerable time and also causes more or less trouble and inconvenience, and it has therefore been the principal object of my presel'it invention to provide a simple and effective means whereby the one adjustment of the feeding mechanism of the work-holder to regulate the n um bcr of stitches to the buttonholc will auixnnatically adjust the action of the pmver-throw-oli' mechanism relative to the stop mechanism whereby the power will be thrown off at the same predetermined number of stitches prior to the action of the stop-mechanism independent of the number of stitches to the buttonhole.

Another object of my invention has been to provide an improved means for regulating the action of the power-throw-ofl' mechanism relative to the stop mechanism whereby the power may be thrown off a greater or less number of stitches prior to the action of the stop mechanism, according to the speed of the machine.

A further object of my invention has been to provide an improved stop mechanism of simple and durable construction for automatically stopping the machine within a partial revolution of the driving-shaft without undue jar or shock.

These objects I secure by means of the new and novel construction and combination of parts, as hereinafter set forth in detail and pointed out in the claims.

Referring to the accompanying drawings, Figure 1 is a front elevation of a buttonholesewing machine with certain of the parts removed having my invention applied thereto. Fig. 2 is a plan view of the same with the arm and its supported parts in section just above the bed-plate. Figs. 3 and 4 are sectional views through line a" 0 of Fig. 1 looking in the direction indicated by the arrow, showing the position of certain parts of the stop mechanism when in operative and inoperative position, respectively. Fig. 5 is a perspective view of a portion of the rear end of the machine. Fig. 6 is a detail view of a certain part of the power-throw-off-controlling mechanism. Figs. 7 and 8 are detail views illustrating different positions of certain parts of the stop and power throw off controlling mechanisms. Fig. 9 is a plan view of a portion of the bed-plate with certain of the parts supported thereon, showing the connections between the work-holder and its feeding and adjusting mechanism.

In said drawings, the head or frame of the wine, comprising thebed-plate 1 and overhanging arm 2, the driving-shaft 3, supported in bearings in said arm and extended at its rear end beyond the latter and having a bearing in a bracket-arm 4, secured to the rear end of the machine, the fly-wheel or pulley 5, madefast on said driving-shaft, so as to rotate therewith, and the driving-pulley 6, loosely mounted on the driving-shaft, so as to rotate thereon and also be capable of having a longitudinal sliding movement whereby it may be moved to and from a position of frictional engagement with the fast pulley, are all substantially the same as disclosed in my said prior patent, No. 635,267.

In accordance with my present invention and as a means for automatically stopping the ma chine upon the completion of abuttonhole or after a certain predetermined number of stitches have been made I provide a lever 7, which is loosely connected at one end with a sleeve 8 upon the drivingshaft, so as to turn and hinge thereon, and at its opposite end is yieldingly held in a normal position against a stop 9 on the frame of the machine by means of a coiled spring 10, which latter connects at one end with said lever and at its opposite end with a fixed pin 11 on the machine-frame. A stop-bar 12 is pivotally connected at one end at 13 with said lever 7 and adjacent to its opposite end is provided with a laterally-projecting pin 1 1, which is engaged by the upper forked end of a vertically-acting slide-bar 15, which latter is supported to slide in a vertically-arranged groove or guideway 16, formed in the rear end of the machine-frame. The

stop-bar 12 is provided with a shoulder 17 at its inner end and is adapted to be operated by the vertically-acting slide-bar 15 to move its said shoulder to and from a position for engaging with a lug or projection 18, located on the hub of the fast pulley 5. In the operation of the machine the slide-bar 15 is held in a lowered position by means as will hereinafter be described, so as to hold the shoulder 17 on the stop-bar 12 below the path of the said projection 18 on the fast pulley, as shown in Fig. 4. Upon the completion of the buttonhole, however, and after the driving-pulley has been released from operative engagement with the fast or driving pulley in a manner as will hereinafter be described the slidebar 15 is then automatically released and moved upward to raise the connected end of the stop-bar 12 and locate its said shoulder 17 in the path of the projection 18 on the fast pulley 5, as shown in Fig. 3, whereby it will engage therewith and stop rotation of the pulley and connected driving-shaft in such direction. In the event of the projection 18 on the fast pulley coming into contact with the stop bar with any considerable degree of force, as is usually the case, the said stop-bar and its supporting-lever 7 will yield outwardly against the pressure of the spring 10, and so prevent injurious jar or strain to the parts.

After the force of the momentum is spent the spring 10 then returns the pulley back to its normal and proper stopping position, which is regulated by the contact of the lever 7 against the stop 9. The slot or opening between the forks at the upper end of the slidebar 15, into which the pin 14 on the stop-bar extends, is formed in the arc of a circle substantially parallel with the periphery of the pulley-hub on which the projection 18 is located, so that the stop-bar will be guided in a path to retain its engagement with the said projection 18 when forced outwardly under the momentum of the pulley 5, as described.

After the pulley 5 has been stopped in its rotation in one direction by the contact of the projection 18 with the yielding stop-bar 12 the same obviously has a backward or rebound movement, which it is necessary to limit in order that the pulley may be brought to a stop with its connected parts in a desired definite position. 1 provide for the stopping of the pulley 011 such backward or rebound movement as follows: A lever 19 is pivotally connected at its lower end at 20 with a bracketarm 21, attached to the 1 nine of the machine, and adjacent to its upper end is provided with an elongated slot 22, through which a bolt 23 on the frame 01'' the machine extends to guide and limit the movement of the lever at such end. A stop-lever 2 1 is pivotally connected at 25 with the upper end of said lever 19 and is arranged with one end 26 extending into a position opposite the end of the stop-bar 12 and with a space between the same into which the projection 18 of the fast pulley is adapted to be received and engaged at its opposite sides when the machine is to be stopped, as shown in Fig. A coiled spring 27, connecting at one end with a fixed pin 28 on the machir1efra1ue and at its opposite end with the lever 19, as best shown in Fig. 5, serves to yieldingly hold said lever in a normal position with one of the end walls of the slot 252 in contact with the bolt 23, in which position of the same the stop-lever 2 1 carried thereby is in its normal position relative to the stopbar to receive the projection 18 therebetween. in order that the inner end of the stop-lever 2 1 may be raised and lowered with the cooperating stop-bar 12 when the latter is moved to and from its operative position by the connecting slide-bar 15, it is provided with an extension 29, which projects beneath the adjacent end of the said stop-bar and is yieldingly held in contact therewith by means of a coiled spring 30, which connects at one end with the outer end of the stop-lever 2 1 and at its opposite end with a pin 31 on the lever 19. By such construction and arrangement 01 the parts the innerend of the stop-lever 2 1 will be drawn downward. by and with the stop-bar 12 when the latter is lowered to its inoperative position below the path of the projection 18 on the pulley, as shown in Fig. 4-, and will be moved upward therewith under the action of the spring to an operative position For engaging with the said projection 18, as shown in .Fig. 3

\Vhen the stop-bar 12 and stop-lever 24 have been moved to their operative position, as shown in Fig. 3, the projection 18 on the pulley 5 will during the revolution of the latter strike against the stop-lever 24: and force the same downward and out of its path and then be engaged by the stop-bar 12 in the manner as hereinbefore described. immediately after the projection 18 has passed over and. beyond the end oi? the stop-lever 2 1 the latter is again returned to its raised position under the action of the spring 30 to receive the projection 1.8 thereagainst in its backward or rebound movement and yicldingly limit the rotation of the puller in such direction, the stop :formed by the lever 2 1 being yielding under the tension of the spring 27 in the same manner and for the same purpose as the first or primary stop 17 under the tension of the spring 10, as hereinbelore described. The opposing stops formed by the adjacent ends of the stop-bar .12 and stop-lever 2s being supported as described thus act to yieldingly stop the machine within a partial revolution of the'driving-shaft and without injurious jar or strain to the parts.

l Vhen the machine is in operation, the vertically-actingslidc-bar 15 is held in its lowered position, with the parts 12 and 24: below the path of the projection 18 on the fast pulley 5,

by means of a horizontally-movable slidelatch 32, which is supported to slide on the bedplate of the machine beneath an overhanging portion of the machine-frame. as clearly shown in Figs. 3 and 1. This latch 32 is provided with a lip or projection 33 at one side thereol, (see Figs. 2, 7, and 8,) which engages with the slide-bar 15, within a notch 34 in one side. thereof, to hold the same in its said lowered position, and when the machine is to be stopped the latch is withdrawn from its engagement with the slide-bar .15 and the latter is automatically raised under the action of a spring 35, which latter connects at one end with the stationary pin 28 and at its opposite end with a pin 36 on the said slide-bar 15.

The slide-latch 32 might be operated to control the action of the stop mechanism in the manner described by any suitable means; but the same, according to my present invention, is automatically controlled from a rotating driving-gear 37, forming part of the workholder-feeding mechanism, through the medium of a lever 58, which latter is pivotally supported in a horizontal position upon the bed-plate of the machine at 39, with one end provided with a double-headed bolt eh), engaging with an upturned end 41 oi the latch 32, and its opposite end provided with two arms 12 12, which are. adapted to be engaged by a pin 13, located on the under side of the disk 37, to communicate a vibrating movement to the said lever 1.18 in a manner as will be described.

in the operation of the machine and when the buttonhole or other work is i'iearing completion the pin 43 on the rotating gear-disk 37 moves into engagement with the arm -12 of the lever 38 and operates the latter so as to move the connecting slide-latch 32 from holding engagement with the vertically-acting slide-bar 15, as shown in Figs. 9 and 8, and

thereby permit the latter to be raised to effeet the stopping of the machine. Then in slide-latch 32,

a slight longitudinal movement thereon between the pulley 6 and the bracket-arn1 4- and is connected by a pin 71 with a short rod 72, which is loosely supported to slide within the hollow end of the shaft 3, with one end pro- 'iecting beyond the end of the latter, as clearly shown in Fig. 1. An elbow-lever 73, pivotally supported at 7e upon the bracket-arm 4:, is arranged with one arm, 75, extending into a position to engage with the end of the said rod 72 for the purpose of forcing the loose drivingpulley 6 into operative engagement with the fast pulley 5 and its other arm, 76, connecting with a vertically-acting slide-bar 77 by extending into an opening 77 therein. This slide-bar 77, which I term the powerslide, is supported to operate in a position adjacent to and parallel with the stop mechanism slide-bar 15 and is provided with two elongated openings 77" 77", through which the pins 28 and 36 extend. Adjacent to its lower end this power-slide '77 is provided with two notches 78 and 78, formed in its opposite edges and in position coinciding with the notches 34: and 34. in the slide-bar 15. A horizontally-acting slide-latch 79, which 1 term the power slide-latch, is supported to operate within a guideway 7 9 in the machineframe, as more clearly shown in Fig. 2, and is provided with a shoulder 80, which is adapted when the machine is in operation to engage with the power-slide 77 within the notch 78 therein and hold the same in a lowered position, with the elbow-lever 73 holding the driving-pulley 6 in operative engagement with the fast pulley 5. By withdrawing the power slide latch 79 from engagement with the power-slide 77 the latter will be automatically raised under the action of a spring 81, and thereby rock the elbow-lever 73 in a direction to release the driving-pulley from its operative engagement with the fast pulley. The said spring 81 for raising the power-slide is connected at one end with a pin 82 on the latter and at its opposite end with a pin 83 on the machine-frame, as clearly shown in Fig. 1.

As a means for automaticallyoperating the power slide-latch 79 l have provided a lever 8* which is pivotally mounted upon a movable stud 85 on the upper surface of the bedplate, with one end having a pin 86 on its under side extending into a cam-groove 87 in the upper surface of the gear-disk b7 and its opposite end having a pivoted lever 88 secured thereon, which is provided with a forked end 89, engaging with a pivoted block 90 on the outer end of the power slide-latch 7 9.

The said groove 87 in the gear-disk 37 is formed with a part thereof extending in a circular path described from the axis of the dish and at one point therein is provided with the cam portion 91, projecting inwardly from the outer wall of the groove, as clearly shown in Figs. 2, 7, and 8.

111 the ope 'ation of the machine and during the sewing of a buttonhole the lever M is held in a stationary position. with the pin 86 at one end thereof extending into the circular portion of the groove 87 in the disk 37, and the lever 88 at its opposite end holding the power slide-latch 79 in engagement with thelowered power slide-bar 77. as shown in Fig. 7. At this same time the stop-mechanism slide-bar 15 is of course held in its lowered position by the latch 32, also as shown in Fig. 7. Now when the buttonhole is nearing completion and at a certain predetermined number of stitches prior thereto the cam-surface 91. of the groove 87 moves into engagement with the pin 86 on the lever 84 and rocks the'latter on its pivot, so as to withdraw the connected latch79 from engagement with the slidebar 77, as shown in Figs. 2 and 8 and by dotted lines in Fig. 7, and so permit the latter to effect the release of the driving-pulley from engagement with the fast pulley, and thereby throw off the power. The parts are so adjusted that such throw-off of the power takes place before the pin 43 on the under side of the gear-dish 37 acts upon the stop-mechanism lever 38, and as the machine continues its operation under momentum the said pin at is carried by the continued rotation of the gear-disl 37 into ongagement with the arm t! of the lever 38 and rocks the latter on its pivot, so as to move the latch 32 from engagement with the slide-bar 15, as shown in Figs. 2 and 8, and so permit the latter to effect the Stt)1')[)ll'1 1' of the machine as hereinbelore described.

It will be understood that the position of the pin 4L3 on the gear-dish 37 relative to the arm 42 of the lever 38 at the time the drivingpulley is released from engagement with the fast pulley determines the number of stitches that will be made between the throw-olf of the power and the stopping oi the machine, as the distance being greater or less in which the pin travels before acting upon the lever 38 sul'ticiently to effect the stopping of the machine allows a greater or less nijunber of stitches to be made accordingly. lherel'ore it will be obvious that by :uljusting the posi tion of the lever 84 in a longitinlinal direction, as indicated by dotted lines in Fig. e, the cam 91 will be caused to act sooner or later upon the pin 8(3 of said lever $4., and so permit the pin 411- on the gearalisk 37 to reach a position more or less close to its position relative to the lever 38 for olii'ecting the stopping of the machine, in this manner the throwing oil? of the power at any desired number of stitches or revolutions of the drivingshaft prior to the stopping of the machine may be regulated.

As before referred to, the throw-oil of the power relative to the stoppingof the machine is regulated according to the speed at which the latter is running, and consequently, the

speed being the same, the power should be thrown off the same number of stitches prior to the stopping of the machine regardless of the number of stitches made in the buttonhole. I provide for this as follows: The lever 84 is provided with an adjustable stop 93 on its upper side, which is adapted to be in a position when the several mechanisms are properly adjusted at one end of the vibrating throw of a pin 92 on the under side of the front end of the feed-mechanism lever 48. e will now consider, for example, that the work-holderfeeding mechanism is adjusted to provide fifty stitches in a buttonhole. If it is then desired to put only one-half the number, or twentyfive stitches, inthe buttonhole, the pivot-pin 50 is properly adjusted so as to secure a greater throw of the lever 48 and cause the gear-disk 37, driven therefrom, to move double the distance at each of its successive step-by-step movements and communicate such movement to the work-holder. ithout further adjustment to the lever 84 the stop mechanism would now be actuated to stop the machine after the throw-off of the power at only one-half the number of stitches as before, on account of the increased distance of the step-by-step movements of the disk 37 in carrying the pin 43 into engagement with the lever 38; but in accordance with my invention when the feeding mechanism is adjusted as described and the machine set in motion the increased throw of the lever 48 causes its pin 92 to engage with the stop 93 on the lever 84 and move the latter longitudinally a distance equal to the increased throw of said lever 48, which change in position of the lever 84 so adjusts the position of its pin 86 as to cause the same to be engaged by the cam 91 on the disk 37 so much sooner than before as to enable the pin 43 to take the same number of step-by-step movements between the throw-ofl? of the power and the stopping of the machine. The timing in the relative actions of the power and stop mechanisms for different numbers of stitches with the machine running at the same speed is thus automatically regulated. v

In the event of the speed of the machine being changed it becomes desirable to throw off the power a greater or less number of stitches prior to the action of the stop mechanism, according as to whether the speed is greater or less. To provide for this the stop 93 is adjustable on the lever 84, whereby the latter may be moved a greater or less distance in a longitudinal direction, so as to adjust the position of the pin 86 to effect the throw-off of the power at the desired number of stitches prior to the action of the stop mechanism. The stop 93 is secured in adjustable position on the lever 84 by means of two set-screws 94 94, which engage with the stop plate through two elongated slots 95 95 therein, as shown.

As a convenient means for permitting of the sliding adjustment of the lever 84 and holding it stationary in adjusted position I have mounted its pivot 85 upon a plate 96, which is supported to slide within a groove 97 in the bed-plate of the machine, as shown in Fig. 6. This plate 96 is provided with a pin 98 on its under side, which extends through an elongated slot 99 in the bed-plate and is provided with a flanged head 100. A coiled i spring 101 is located on said pin 98, with one end bearing against the head 100 and its opposite end against a plate or washer 102, which latter is loosely supported on the pin 98 and spans the slot 99 in the bed-plate on the under side of the latter. The spring 101 as thus arranged holds the plate 96 in frictional engagement with th bed-plate and serves to hold it stationary in any adjusted position.

The forked lever 88, carried by the lever 84, is pivotally connected at one end at 103 to the latter and is provided with an elongated transversely-arranged slot 104 between its ends, through which a pin 105 on the lever 84 extends to limit the movement of the same. A spring 106 (indicated by dotted lines in Fig. 2) is secured on the under side of the lever 84, with one end pressing against a pin 107 on the lever 88 to movably hold the latter in a normal position with one end wall of the slot 104 in contact with the pin 105. The purpose of this construction is as follows: \Vhen the slide-bars l5 and 77 have been lowered and the machine set in operation and during such operation the lever 84 is actuated by the cam of the gear-disk 37 to move the latch 79 into position to enter the notch 78 of the slidebar 77, then in the event of said notch not being in position for any reason to receive the latch the lever 88 will yield under the pressure of the spring 106, so as to prevent breakage or strain to any of the parts and at the same time hold said latch in position, whereby it will be caused to snap into the notch 78 when brought into position opposite the same.

Having thus illustrated and described a practical embodiment of my invention, 1 do not wish to be understood as confining myself to the particular details of construction and combination of parts as set forth, as the same may be more or less materially modified without departing from the spirit of my invention. Also it will be obvious that the stop mechanism proper may be employed in connection with various kinds of sewing-machines other than a buttonhole -machine as herein shown.

\Vhatl claim, and desire to secure by Letters Patent of the United States, is-

1. In a sewing-machine, the combination, with a feeding mechanism and adjusting means therefor, of a stop mechanism, a power-throwoif mechanism, and means for regulating the action of the power-throw-otf mechanism relreaper atively to the stop mechanism by the adjustment of the feeding mechanism, for the purpose set forth.

2. in a sewing-machine, the combination, with a feeding mechanism and adjusting means therefor, of a stop mechanism, a power-throwoff mechanism, means for controlling the action of said stop and power-throw-off mechanisms from the feeding mechanism, and means for regulating the action of the powerthrow-off mechanism relatively to the stop mechanism by the adjustment of the feeding mechanism, for the purpose set forth.

3. in a sewing-machine, the combination,

with a feeding mechanism and adjusting means therefor, of a stop mechanism, a power-throwoff mechanism, means for controlling the action of said stop and 1J)o\ver-thro\voff mechanisms, and means for regulating the action of the power-throw-oif mechanism relatively to the stop mechanism by the adjustment of the feeding mechanism, for the purpose set forth. 4. .ln a buttonhole-sewingmachine, the combination, with the work-holder and its feed- .ing mechanism, of a stop mechanism, a powerth row-off mechanism, means for automatically controlling the action of said stop and powerthrow-off mechanisms, and. means for regulating the action of the power-throw-off mechanism relatively to the stop mechanism by the adjustment of the work-holder-feedingmechanism, for the purpose set forth.

5. ln abuttonhole-sewing machine, the combination, with the work-holder and its feeding mechanism, of a stop mechanism, a powerthroW-oif mechanism, means forming an operative connection between one of the movable parts of the work-holder-feeding mechanism and the said step and power-throw-oif mechanisms, and means for automatically regulating the action of the poWer-throw-off mechanism relatively to the stop mechanism by the adjustment of the work-holder-feeding mechanism, for the purpose set forth.

6. in a buttonhole-se\vingmachine, the eombination, with the main drivii'ig-shaft having a fast pulley thereon, a loose driving-pulley for engaging with said fast pulley, and the work-holder and its feeding and :uljusting mechanism, of a stop mechanism, a powerthrow-ol'l' mechanism controlling the action of said loose driving-piilley, means for actuating said stop and power-throw-off mechanisms from the \vork-holder-feedingmechanism, and means for regulating the action of the powerthrow-off mechanism relatively to the stop mechanism by the adjustment of the workluilder-feeding mechanism, for the purpose set forth.

7. in a sewingmachine, the combination, with a feeding mechanism embodying a lover, of a stop mechanism, a power-throw-oif mech anism emlmdyingan adjustable lever, means for actuating said stop and power-throw-off mechanisms from the feeding mechanism, and means for adj usting the throw of the said feeding-mechanism lever and thereby regulating the position of the said throw-off mechanism lever, for the purpose set forth.

8. In a sewing-machine, the combination, with a feeding mechanism, of a stop mechanism, a poWcr-throw-off mechanism embodying an adjustable sliding lever, and means for au tomatieally controlling the action of said step and power-throw-ofi? mechanisms from the feeding mechanism, for the purpose set forth.

9. ln a sewing-machine, the combination, with a feeding mechanism, of a stop mechanism, a power-tlnow-ol'l mechanism embodying an adjustable lever, and means for automatically controlling the action of said step and power-th row-off mechanisms from the feed ing mechanism, for the purpose set forth.

10. In a sewing-machine, the combination. with a feeding mecl'ianism embodying a cam, a power-throw-off mechanism, and means, embodying an adjustable lever, for actuating the power-throw-oif mechanism from said cam.

11. In a sewing-machine, the combination, of a feeding mechanism embodying a rotatable cam, and a power-throv-olf mechanism, the latter embodying a pivoted lever having a part thereof extending into a position to be engaged by the said cam, the pivot-sup 'iort of said lever being adjustable whereby the lever maybe adjusted, in its relation to the said cam, for the purpose set forth.

12. In a sewing-machine, the combination,

of a feeding mechanism embodying a vibrating lever and a rotatable cam, and a power-throwoii' mechanism embodying an adjustable pivoted lever, the latter being arranged to be operated by the said cam and having an adjustable stop thereon adaptedto be engaged by said vibrating lever or a part thereof, for the purpose set forth.

13. In a sewing-machine, the combination, of a po\vertl1ro\v-off mechanism embodying a lever, a stop mechanism embodying a lever, and a feeding mechanism embodying means for successively engaging the said levers to actuate the throw-oil and stop mechanisms at certain predetermined times, for the purpose set forth.

let. in a sewing-machine, the combinatioi'i, of a power-throw-oil mechanism and a stop mechanism, each embodying a vertically-acting slide, a spring for moving said slide in one direction, and a latch device for engaging with the slide to hold it against the pressure of the spring in the opposite direction, and a feeding mechanism having means for successively operating said latch devices at predetermined times to effect the operation of first one mechanism and then the other, for the purpose set forth.

15. in a sewing-machine, the con'ibination, of a power-throw-oif mechanism and a stop mechanism each embodying a vertieally-acting slide arranged adjacent to each other, a spring for holding said slides in a normal raised position, two independent slide-latches for engaging with said vertical slides and holding the same in a lowered position against the pressure of the spring, a feeding mechanism having means for automatically operatingsaid slide-latches to move the same to and from their position in holding engagement with the vertical slides, and a spring-pressed catch carried by one of the slide-latches for engaging with the vertical slides when first lowered and preliminary to the engagementtherewith of the slide-latches, for the purpose set forth.

16. In a sewing-machine, the combination, of a power-throw-ofl' mechanism and a stop mechanism each embodying a vertically-acting slide arranged adjacent to each other, a spring for holding said slides in a normal raised position, two independent slide-latches for engaging with said vertical slides and holding the same in a lowered position against the pressure of the spring, a feeding mechanism having means, embodyinga yielding part, for automatically operating said slide-latches to move the same to and from their position in holding engagement with the vertical slides, and a spring-pressed catch carried by one of the slide-latches for engaging with the Vertical slides when first lowered and preliminary to the engagement therewith of the slidelatches, for the purpose set forth.

17. In a sewing-machine, the combination, with afeeding mechanism, of stop and powerthrow-off mechanisms actuated from said feed ing mechanism, and means for regulating the action of the power-throw-off mechanism relatively to the stop mechanism, for the purpose set forth.

DANL. MILLS.

Witnesses:

F. D. BROWN, WM, A, SHRYooK.

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