US1152498A - Sewing-machine. - Google Patents

Description

A. F. FIFIELD.

SEWING MACHINE. APPLICATION FILED MAR. 18, 19H.

PatentedSept. 7, 1915.

2 SHEETS-SHEET I.

COLUMBIA PLANDGRAPH c0.,wAsHlNu'r0N. b. c.

A. F. FIFIELD.

SEWING MACHINE.

APPLICATION ,FILED MAR.18. 191l- Patentedsept. 7, 1915.

cQLuNmA PLANOGRM'H c0..\vAs|-uNuToN. n. u.

prises stitch-forming means including a rec- ALBERT'FQFIFIELD, QF ELIZABET QNEW messy, assieivon ToTI-ins'INGERfivi'ii'NU- FAcTUaIne COMPANY, A oonr'omt'ri'on' OFNEW J'E'RsEY.

' SEWING-MACEEITN E.

Specification of Letters Patent.

Patente clSept. I, 1 915.

Application filed March 18, 1911. Serial No.- 615,193.

To caller/m itma z concern: i

Be it known that I, ALBERT F. FIFiELD, a citizen of the United States, residingiat Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Sewing-lilachines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates more particularly to an improvement in that class of straightai ay stitching machines which are provided with means for severing the thread or threads at the completion of each seam, as exemplified in the United States Patent to R. V. ThomsoinNo. 660,130, of October 23, 1900, and it has for its object to simplify and otherwise improve the construction of machines of this class. i

"The machine is designed more particularly for sewing tongues to the vamps of lace shoes and also for toe-closing the linings of shoes, although adapted for many other kinds of stitching operations.

In its preferred form the mechanism comtilinearly reciprocating needle in conjunction with a well known form of four-motion feedingmechanism, and is provided with thread-cutting mechanism and a stopmotion device controlled by a common camwheel, as in'the United States Patent to C. M. Horton No. 807,676, of December19,

The special feature of the present improvement is the provision. of manually controlled coupling means whereby the actuating cam maybe coupled to and uncoupled from its driving means at the will of the operator, the. machine being adapted to run during ordinary stitching operations sub stantially aslightly and quietly as the ordinary straight-away stitching nach'ine, the cutter and stop-motion actuating means being normally stationary during the stitching operations.

In the accompanying drawings, Figure 1 is a perspective view, partly in section of a sewing machine embodying the present improvements, Fig. 2 a front end view of the same with the face-plate of the bracket-arm removed, and Fig. 3 a hottom plan view of the machine. Fig. ft is a detail sectional elevation of a portion oft-the stopmotion device and Fig. 5a detail perspective view of the stop-motion tripping means. Figs. 6, 7, 8 and 9 represent the coupling means for connecting the actuating cam with its continuously rotating driving member, Fig. 6 being a face view of the coupling disk, Fig.7 a' transverse section of the same, Fig. 8 also a transverse-section thereof onthe line a: of Fig; 6, with the coupling disk and feed-wheel slightly separated, andFig. 9 a perspective view of the coupling disk and its springdetached from the other parts. F 1g. 10 is an elevationshowing in detail a portionof the controlling means forthe coupling-disk and cam-wheel detents. "Fig. llis a perspective view ofthe thread-cutting knives and sector-gear by which they "are carried.

The frame of the machine comprises the usual bed plate 1 and bracket-arm comprising the'hollow standard2' and lateral arm 3 terminating inthehea'd 4, in which is journaled the main-shaft 5 carrying the fast and loose pulleys (Sand 7 respectively. The main-shaft has fixed upon its forward end the crank-plate 8 carrying'the crankpm 9 connected by the'pitman 1'0 with-the rectilinearly reciprocating needle-bar 11 journaled in the head tofthe bracket-arm and carrying the needle 12. Cooperating with the needle beneath the throat-plate is the oscillatingshuttlc l3 'provided with the thread-case -1t and fitted fvvithin the ,shuttie-race 15. means of thedriverlG fixed upon the forward end of the rock-shaft 17 journaled beneath the bed eplate and "provided with voperative connections, as inthe well known Singer oscillating shuttle machines, with the The shuttle is actuated by.

Asv shown more fully in the said States Patent No. 807,676, the SCOPJIlOtlOIl arm 28 and pitman 29 with an eccentric 30 upon the main-shaft.

United comprises a swinging lever 31 having its lower end pivotally mounted in the oscillalarly in Fig. 4. Secured to the lever 31 by means of the screw 40 is the fork 41 embracing the driving belt and adapted to shift it from one to the other of the pulleys upon the main-shaft.

The lever 31 is normally pressed backlw'ardly to bring the plunger 34 into operative relation with the cam 36 by means of a spring interposed between the same and the-standard 2 of the bracket-arm, and is shifted forwardly out of operative relation with the stopping cam by means of a bellcrank fulcrumed upon the screw-pin 42 within the bracket 43 and having a depending arm 44 resting against the rearward edge of the lever and a lateral arm 45 pro vided with an eye 46 for attachment of'a tre'adle -rod byfmeans ofwhich the bellcrank is'rocked to disengage the plunger from the cam 36 and ship the belt from the loose pulley to the fast pulley inrstarting the machine; Fulcrumedvupon' the stud-screw 47 above the bracket 43 is a latch-lever 48 whosehooked rearward end is adapted to 'engage'the foot 41 of the belt-shipper fork and whose opposite end is disposed in register'with one end of the transversely arranged push-pin '49 journaled within the bearing member 50 secured upon the standard 2 and limited in its endwise movements by means of the pin 51 working in the slot 52 of the bearing member 50 The latchlever48'is normally pressed into operative relation with the stop-lever by means of the r spring 53 surrounding the fulcrum-stud 47.

The push-pin 49 is operated to trip the latch-lever'48 by engagement with the inclined tripping plate-54 having in one end the slot55 through which passes the fastening screw 56 by which it is adjustably secured upon the recessed inner face of the cam-wheel 57 whose hub 58 is journaled 62 fixed upon the transverse shaft '63 suitably journaled in the bracket-warm andprovided with a bevel pinion 64 mesh ng with a similar pinion 65 which is fixed upon the main-shaft.

As shown and described in the said Patent No. 807,676, the upper and lower threadcutting knives 66 and 67 are secured to a sector-gear 68 journaled in a bracket 69 attached to the shuttle-race cover-slide 70. These knives have plural-stage actions for initially engaging and positioning the upper and lower threads and thereafter severing them in a subsequent stage of operation. Meshing with said sector-gear is a rack 71 carried by a sliding bar 72 arranged beneath the work-plate and having near its rear end the block 73 formed with a notch entered by the reduced lower end 74 of a lever 75 pivotally mounted upon a fixed stud-screw 76 and provided at its upper end with the roller-stud 77 entering the cam-groove 78 in the outer face of the cam-wheel 57. The bar 72 carries at its rear end the stud 79 engaged by the forked arm 80 of a bellcrank-lever fulcrumed at 81 and having another arm 82 provided with a plunger-pin 83 having a stud 83 engaged by the spring 84 tending to press the pin outward into the slot 85 in the lower end of the depending arm 86 secured upon the stop-lever 31. The bracket 43 has a lateral socket 87 to which is fitted the head 88 of a buffer-pin surrounding whose reduced shank is the spring 39 interposed between the head and the threaded bushing 90 locked adjustably in the outer'end of said socket by means of the set-nut 91. V

Coupling means are provided whereby the cam-wheel 57 is normally connected for rotation in unison with the driving gear 60, which is connected with the main-shaft through the gearing before described so as to perform one rotation for each ten rotations of the main-shaft, and the tripping plates 54 of the stop-motion device are duplicated and the cam-grooves 78 of each semi-circumference of the cam-wheel are alike, so that the stop-motion and threadcutting mechanisms are both actuated twice for each rotation of the cam-wheel.

The outer face of the driving member '60 is provided with an annular series of recesses or notches 92 adapted to receive the adjacent ends of the coupling pins 93 fitted within sockets 94 in the hub portion of the ream-wheel 57 and having interposed between their enlarged heads and inner ends of the sockets the springs 95, while to their reduced outer ends, projecting beyond the V V sockets 94 are secured by means of the transupon the tubular hub 59 of the driven gear- 7 .wheel 60 journal'ed upon the fixed screwstud 61 tapped into, the bracketearm, the" gear 60 meshing with an actuating pinion wheel 57. The disk 101 has in its inner face the annular groove 102 to receive the spring part 128 and working in a lateral slot 138 in 103 one end of which rests against a pin 104 within said slot and the other end engages a pin 105 projecting into said groove from the, adjacentface of the cam-wheel 57. The action of the spring 103 is normally to turn the disk 101 intosuch position upon the cam-wheel that the pin 104 rests in contact, with the stop-pin 106 also projecting from the camrwheel into the groove 102. In this position of the coupling disk the cam-blocks 97 are permitted to move down the cam-inclines 99 to enable the coupling pins 93 under the action of their springs 94 to enter their recesses or pockets 92 in the driving member for coupling the cam-wheel with the latter. The slots 100 of the coupling disk are covered by means of an annular plate 107 secured thereon by means of screws 108.

The disk 101 is provided at diametrically opposite points with the peripheral notches 109 to afford shoulders for engagement with the flattened and outwardly curved upper end 110 of an arm 111 whose hub 112 is secured upon the pin 113 within the forked bearing bracket 114 secured upon the bedplate. The pivotal pin 113 has also fixed thereon the hub of an upwardly extending arm 115 having at its upper end a lateral pin 116 entering a longitudinal slot 117 in the forward end of a link 118 which is pivotally attached at its opposite end by means of the screw-pin 119 to an elbow-lever 120 rigidly connected with the stop-motion actuating" bell crank-lever 44 45, said elbowlever having a forwardly extending arm to which is connected one end of the. spring 121 whose opposite end is attached to a hook 122 secured to the base of the bracket-arm standard. The arm 115 is connected with one end of a spring 123 whose opposite end is attached to a stud 124 secured to the standard 2 and adapted to normally draw said arm forward to press the arm 111 into operativev relation with the periphery of the disk. 101.

The cam -wheel 57 is provided with the diametrically arranged peripheral notches 125 adapted to be entered by the lateral tooth 126 upon the flattened upper end of the plunger-rod 127 which is formed in its lower portion with anenlargement 128 fitted within a socket 129 in the tubular arm 130 having its hub 131 secured by means of a set-screw 132 uponthe pivotal pin 133 width in the forked bracket-piece 134 secured upon the bed-plate 1. In the upper end of the socket 129 is introduced the bushing 135 serving as a stop against'which the upper end of the enlargement 128 of the plungerrod 127 is pressed by means of the spring 136 interposed between the lower end of the portion 128 and the bottom of the socket 129, a transverse pin 137 being applied. to the the member 130 to prevent the plunger-rod from turning.

Upon the inner end of the pivotal pin 133 is secured the hub of the upwardly extendi g arm 139 carrying the lateral pin 140 entering a longitudinal slot 141 in the forward end of a link 142 which is pivotally attached at its opposite end by means of the screw-pin 119 to the elbow-lever 120. The arm 139 is connected with one end of a spring 143 whose opposite end is attached to a stud 144 secured to the standard 2 and adapted to normally draw said arm forward to press the plunger-rod 127 into operative relation with the periphery of the camwheel 57. The spring 121 serves to normally maintain the stop-motion actuating bell crank in inoperative position with the arm 44 retracted from operative relation with the stop-lever 31, and this spring is sufficiently strong to counteract the effect of the springs 123 and 143 tending to draw the members 111 and 127 into operative relation with the coupling disk 101 and camwheel 57 by engagement of the pins 116 and 140 with the forward extremities of their respective slots in the links 118 and 142. \Vhen such bellcrank is operated in opposition toits spring 121 in starting the machine, the forward movement of the links 118 and 142 serves to release the pins 116 and 140 from operative engagement with the ends of the slots 117 and 141 so as to permit the springs 123 and 143 .to act in drawing the members 111 and 127 into operative relation with their respective cam-members.

hen the machine'is at rest, at the completion of a stitching operation, the cutting blades 66 and 67 remain in their final threadengaging position which they assume under the action of the rock-lever 75, preparatory to the final cutting action induced by the overthrow of the machine in coming to rest underthe operation of the stop-motion, the needle being in raised position. In starting the machine, the bellcrank-arni 45 is depressed by means of the usual treadle connection to bring the arm 44 into forcible engagement with the'stoplevei"31 which is 1 shifted forwardly to disengage the plunger 34 from the stopping cam 36 and simultaneously shift the belt from the loose pulley 7 to the fast pulley 6. By this action, the links 118 and 142 are advanced to release thearms 115 and 139, whereby the rods 111 and 127 are caused to rest upon the peripheries of their respective canrmembers, this relation of the parts referred to being maintained so long as the bellcrank-arm 45 is held down by the operator. Under the conditions described, the main-shaft is coupled with the Source of power and the stitching proceeds continuously and the driving gear-wheel 60 performs its, continuous rotary movements throughout the period of movement of the main-shaft to which it ispermanently geared.

Under .theaction oi the spring 103 upon 2 the coupling disk 101, the coupling pins 93 blades 66 and 67 to intermediate position the second stage of the retrograde movement of the cutter-blades into retracted position, asrepresented in' Fig. 3.

Immediately after the described retractive movement of the cutter-blades, the engagement of the nose110 ofthe detent-arm 111 Y with one of the shoulders 109 of the confts pling disk causes the arrest of the movement of the 'latter'while the cam-wheel 57 continues to rotate With its driving member 60, and carrying the coupling pins 93 around with it so as to cause the blocks 97 to ride up the cam-inclines 99 of the now stationary disk 101 for withdrawal of the pins 93 from their respective pockets 92 in the driving member 60 for disconnecting the cam-Wheel from the latter. -During the retraction of the cam-pins 93, the rotation of the Wheel 57 brings its peripheral-notches 125 into register with the tooth 126 of the detaining plunger-rod 127 which snaps into the same to lock the cam-wheel against further rotation, as' represented in Fig. 1. The retraction of the coupling pins is not completed until the action of the detaining member just described, and to compensate for any difference in timing of the uncoupling of the cam-wheel from its driving member and its engagement With its detaining member 127, the buffer-spring, 136 is employed, so as to permit the cam-wheel, 57 to have a slight advance movement after'its engagement by the detaining member 127 during which the uncoupling maybe completed.

VVhile the bellcrank-arm 45 is held down .by the operatorthe cam-Wheel 57 continues to be uncoupled from its continuously rotating driving member 60 and the stitching and feeding mechanlsms continue in opera- 1 tion to produce a seam of any desired length.

The completion of the seam is performed at will by theoperators merely releasing the bellcrank-arm 45, whereby the spring 121 is caused to throw the bellcrank into. re-

tra'cted inoperative position, whereby through the links 118 and 142 the detaining members 111 and 127 are retracted from their respective cam-members. The release of the cam-disk 101 permits its spring 103 to give it a slight advance movement to relieve the pressure of the cam-inclines 99 upon the wings 98 of the blocks 97, thereby permitting the springs 95 to force the coupling pins 93 outwardly into contact with the face of the driving member 60 and to enter the coupling pockets 92 therein as soon as they come into register with the coupling pins, thus reestablishing operative relation with the driving member 60 and cam-wheel 57.

As the cam-wheel reassumes its rotary movement, the traverse of the roller-stud 77 in the concentric portion 78 of the camgroove 78 causes the rock-lever 75 to remain in retracted position during the formation of the next stitch by the stitch-forming mechanism, but as the needle performs the initial. part of its descent for the succeeding stitch, the movement of the stud 77 through the inclined portion 78 of the cam groove 78 causes the actuation of the rocklever 75 to advance the cutter- blades 66 and 67 into intermediate position in which the blunt point of the lower-thread cutting blade 67 moves beneath the needle-hole in the throat-plate and engages the shuttlethread leading through the same, the cutting members remaining in these positions until the needle is rising after its descent for the final stitch-forming operation, when the traverse of the stud 77 through the inclined portion 78 of the cam-groove 78 produces through the rock-lever 75 the second stage of advance of the cutter-blades wherein the blunt point of the blade 66 enters the distended loop of needle-thread engaged by the shuttle, while the blade 67 causes the deflection of the shuttle-thread to draw ofii from the bobbin a sufficient supply for production of the initial stitch of the succeeding stitching operation.

Just as the stud 7 is traversing the camgroove portion 78, one of the tripping plates 54 presses inwardly the push-pin 49 which causes the disengagement of the latch-lever @8 from the stop-lever 31 and permits the latter to assume stopping position with the nose 35 of the plunger 34: in readiness to snap underneath the low portion of the stopping cam 36 When presented thereto in the continued rotation of the main-shaft. As the stop-lever 31 is thrown backwardly under the operation of its spring (not shown) the arm 86 is thrown forwardly, thus pressing inwardly the plunger-pin 83 which is, in the intermediate position of the cutter-blades disposed at one side of the aperture 85. As the slide-bar 72 is moved in the completion of the second stage of the cutter movement, the plunger-pin snaps into its stop-lever 'arm '86 acts "through the bellcrank 80 "82 to impartto the slide-bar 72 a final jog whic'hprodu'ces a third and final stage of advance ofthecutter-blades which brings their cutting edges 66 and 67 respectively, arranged nearthe heels ofsu'ch blades, into contact with the upper and lower threads, whereby the latter may be severed. Topermit this final movement under the action of thestop-m'otion device, the cam-groove 78 of thecam-wheel '57 is provided with lateral clearance pockets 78 into which the stud '77 of the rock-lever is permitted to move freely under the -actuation of the slide-bar 72.

While int'h'e present embodiment of the improvement several stitches are made in a cycle of operation of the cam wh'eel between" stopping points corresponding with the diametrically disposed re'ceisses78 of the'camgroove 78, this feature is'unobjectionable in the class of work for whichjthe machine is particularly designed, as the operator is enabled to readily cause the stoppage of the machineuponfthe desired stitchby releasing the stop leveroperating bellcrank a few stitches'beforethe desired action is to take place.

One ofthe important advantages of this improvement'is the'disconnec'tion from the driving shaft of the actuating means forthe cutting mechanism and stop-motion, so that the machine maybe operated as anordinary straightaway stitching machine excepting at the beginning andend eta seam wherein it insures the' arrest of the stitch-forming mechanism with the zneedle raised and the cutting of both threads beneath the work, thus saving any manipulation of the vmachine preparatory to introducing and removing the work andthe loss of thread and the time for cutting apart successively stitched articles, whichhas beenusual heretofore. l I, t

It is evident from the nature of the improvement as set forth the foregoing description that it is susceptible of material modification in the construction and arrangement of its various component parts, and that the invention is not therefore limited to the specific embodiment herein shown and described. g

Having thus set forth the nature of the invention, what I claim herein is I 1. In a sewing machine, the combination with stitchgforming mechanism, of thread cutting mechanism, a cam for controlling the operation of the thread-cutting'mechani'sm, actuating means for said cam, a coup'ling device between said cam and its actuating means, and manually controlled means adapted for engagement with said cam independently of the coupling device whereby the latter is caused'to couple and uncouple saidcam and its actuating means.

threa'd-cu'tjtin g mechanism for, imparting to r,

the latter initial threadengaging action, a connection between said stop-motion and the cutting mechanism through which the latter receives afinal thread-cutting movement, actuating means forsai'd earn, a coupling between said cam and its actuating mechanism, and manually controlled meansfor operating said coupling device in coupling together and uncoupling said cam and its actuating means. I v i p w 4. In a sewing machine, the combination with stitch-forming mechanism including a needle and loop-taking means, and actuating means therefor, of thread-cutting mechanism including a member adaptedto engage the thread intermediate theneedle and looptaking means, a rotaryinember'for controlling the action of the thread-cutting mechanism, means connected with the actuating means of the stitch-forming mechanism for actuating said, rotary member, and means for connecting and disconnecting saidrotary member and its actuating means.

,5. In a sewing machine, the combination with stitch-forming mechanism actuating meanstherefor, of thread-cutting mechanism comprising atrain of permanently connected elements, a rotary member for controlling the action of the same, means connected with the actuating meansof the stitch-forming mechanism and normally coupled with said rotary member whereby the latter is actuated, and manually operated means for disconnecting said rotarymember and its actuating means and maintaining such disconnection for stitching-periods of variable length.

6. In a sewing machine, the combination with stitch-forming mechanism, of threadcutting mechanism, a controlling cam and operative connections between v the same and theTthread-cutting mechanism whereby the ing said coupling latter is actuated, a continuously movingrotary driving member, couplmgmeans between the same v and said cam iLIlClCOI11P1'1S ing a coupling element carried by said cam,

and a rotary member movable with andalso independently of said cam and adaptedrfor shifting said coupling element into and out of operative 'rel'ation'with the drivingineinv V ber, and means acting through said rotary member for causing the operation of said coupling element.

7.. In a} sewing thethread-cutting mechanism whereby the latter 1s' actuated, ja continuously movmg rotary drivmg menibeiycouphng means between the same and said cam'and comprising acoupling'element carried by saidcam and provided with acam-follower and a rotary cam member movable with and also independentlyor" said cam and provided with a cam portion adapted for engagement with the follower of said coupling element, a

springior norma'iiy maintaining said cou plingelement in operative position, and manually controlled means for locking said rotary cam memberagainst movement while the controlling cam is in motion for retractmember from operative position.

8. In a" sewing machine,-the combination 'with stitch-forming mechanism, of threadcutting mechanism, a controlling cam and operative connect ons between the same and the thread-cutting mechanism whereby the latter is actuated, a continuously moving rotary driving'member, coupling means between the same and said cam and comprising a coupling element carried by said cam and provided with a cam-follower and a rotary cam member movable with and also independently of saidcam and provided with a cam'iportion adapted for engagement with the follower of .saidcoupling element, a spring for normally maintaining said couling element in operative'position, manually controlled means for locking said rotary cam member against movement whileithe controlling cam is 'in-motion for retracting said coupling member fromoperative posi .tion, fand means f01" detaining the controlling cam against rotatlon when uncoupled from its driving member.

\19. In a sewing machine, the combmation with stitclrforming mechanism, of thread cutting mechanism,a controlling cam and operative connections between the same and the thread-cutting mechanism whereby the latter is actuated, a continuously-movingrotary driving member, coupling means between thesame and said cam and compris- 1 machine, the combination withstitch-forming mechanism, of threadcutting meehanism, 'a controllingcam and operative connections between the same and ing a coupling element carried by said cam and provided with a cam-follower and a rotary cam member movable with and also independently of said cam and provided with a cam portion adapted for engagement with the follower of said coupling element, a spring for normally maintaining said coupling element in operative position, manually controlled means for locking said rotary cam member against movement while the controlling cam is in motion for retracting-said coupling member from operative position, and yieldingly acting means for detaining the controlling cam against rotation when uncoupled from its driving memher. i

10. In a sewing machine, the combination with stitchforming mechanism, a stop-motion for controlling the action of the same, and a manually controlled actuator for operating the stop-motion to start the stitch.- iorming mechanism, of thread-cutting mechanism, a controlling cam provided with means whereby the stop-motion may be tripped to arrest the action of the stitch forming mechanism and the thread-cutting thread-cutting mechanism, actuating means therefor, a coupling device between said controlling means and its actuating means, and

manually controlled means independent of said actuating means for interrupting and establishing driving relation between the latter and said controlling means. I

12. In a sewing machine, the combination with stitch-forming mechanism and actuating means therefor, of thread-cutting mechanism including a member having a path of movement within the range of, action of the stitch-forming mechanism, controlling means including a rotary element having a driving connection with said actuating means and an operative connection with the thread-cutter whereby the latter may be actuated, and manually operated means for rendering said controlling means effective or ineffective at will.

13. In a sewing machine, the con'ibination with stitch-forming mechanism and a stopmotion for controlling the action of the same, of thread-cutting mechanism, a cam llO for tripping the stop-motion to arrest the stitch-forming mechanism and actuating the cutting mechanism, and manually operated means whereby the cam is rendered eifective or ineffective at will in tripping the stop-motion and actuating the cutting mech anism.

14. In a sewing machine, the combination with stitch-forming mechanism, thread-cutting mechanism, and a stop-motion, of controlling means comprising a cam and con nections between the same and the threadcutting mechanism and stop-motion respectively, for effecting the cutting of the threads and arresting of the stitch-forming mechanism, and manually operated means for rendering said controlling means efiective or ineffective at will. 15. In a sewing machine, the combinatio with a shaft, stitch-forming mechanism operatively connected therewith, and a stopmotion including a vibratory lever for controlling the operation of said shaft, of thread-cutting mechanism, connecting means between the thread-cutting mechanism and said shaft and including stop-motion tripping means, a connection between said vibratory lever and the thread-cutting mechanism, and manually controlled means acting upon said vibratory lever and through said connecting means in establishing and interrupting operative relation between said shaft and the thread-cutting mechanism.

16. In a sewing machine, the combination with stitch-forming mechanism including a needle and a cooperating loop-taker, actuating means therefor, and a stop-motion for controlling the action of the same, of threadcutting mechanism including successively acting thread-positioning and cutting means, connecting means between the thread-cutting mechanism and said actuating means for imparting to the thread-cutting mecha nism an initial thread-positioning stage of its operation, said connecting means being provided wlth a stop-motion tripping element, an operative connection between the stop-motion and the thread-cutting mecha- V ALBERT F. FIFIELD.

Witnesses:

W. P. STEWART, H. A. KORNEMANN, Jr.

Copies of this patentmay be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. 6.?

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