US1543265A - Inseam-sewing machine - Google Patents

Description

June 23, 1925. 1,543,265 A. R. MoRRlLL A INSEAM SEWING MACHINE original Filed Aug. 9. 1918 2 sheets-sheet 1 June 23, 1925. 1,543,265

A. R. MORRILL INSEAM SEWING MACHINE Original Filed Aug. 9, 1918 2 Sheets-Sheet 2 #will Patented June 23, 1925.

omi-En STATES PATENT OFI-"ics,

ALFRED R. MORE-ILL, vor swAMrsCoTT, MASSACHUSETTS, ASSIGNOR To UNITED SHOE 'Y MACHINERY CORPORATION, OF EivrER-SON,` NEW JERSEY, A CORPORATION F NEW JERSEY.

INSEAM-SEWING- MACHINE. v

Application filed August 9, 1918, Serial No. 249,088. Renewed December 9, 1919. Serial No. 343,646.

1o all whom t may concern.'

Be 1t known that I, ALFRED R. MoRRiLL, a citizen of the United States, residing at Y Swampscott, in the county of Essex and chine of this class, and before the shoe can be removed from the machine, the last loop 1 of thread drawn. through the work by the il tracted free of. the thread.

needle must be freed from the needle hook and the needle mustA be brought to rest, out of engagement with the shoe. One Object of the present invention is to provide novel and ecient means for freeing the thread from the needle at the completion of the sewing. To this end the invention contemplates freeing the thread byv so shifting thel position of the looper that it will be ineifective to lay the thread vin the needle hook during the last cycle of operations of the machines. /Vith the looper thus ineifectively operating during the rlast cycle, the needle will be retracted with its hook empty l and therefore the last loop of thread will be drawn through the work by theneedle during the preceding cycle. This loop will be freed from the needle hook by the -final advance of the needle which will then be re- The invention contemplates the Shifting of the looper in any manner or direction which will render its operation ineffective to lay the thread in the needle hook. -It lis preferred, however,

'l to so shift the looper thatits movement will take place entirely at one side ofthe needle during the last cycle of operations.

Any suitable `construction' of looper and looper actuating mechanism may be utilized in thepractical application of the above feature of the invention; It is preferred, however, toutilize a novel looper construction which forms a furtherfeaturejof the present invention and' which may be used to advantage either with or without the features Vrelating to the freeing of the thread from the needle.

The various features 4of the invention will be readily understood from an inspection of thereof with parts broken away or shown in section kfor clearness of illustration; Fig. 3 is a detail plan view illustrating the sidewis'e shifting of the looper during the last-cycle of operations; Fig. 4 is a detail sectional. view on line X of Fig. 1, indicating the normal movement of the looper about the needle hook; and Fig. 5 is a similar view indicating the movement of the looper relatively to the needle during the last cycle.

In .the drawings the inventionl is 'shown as embodied. ina welt sewing machine in which the curved hook needle is indicated at 2, the thread finger at 4, and the welt guide at 6. These parts are adapted to be operated in any usual manner. `The looper is indicated at 8, and is operated by mechanism hereinafter described. During the sewing operation-the camshaft 10 is driven continuously in the direction of the arrow in Fig. 1 by means of a pulley 12 and suitable driving mechanism, 'not shown, which may be controlled by a foot treadle in any well known or usual manner so as to keep the machine connected with the driving power while the 'treadle is kept depressed and kto cause it to be disconnected therefrom by the release of the treadle.

When the treadle is released to' stop the machine, stopping mechanism, which is similar in construction to that shown and described in the patent to Topham, No.

'p 1,191,747, dated JulylS, 1916, acts to continue the forward movement of the cam shaft and bring the machine to rest with the needle in retracted position free of the work. The movement of a part of the stopping mechanism is utilized to operate the looper shifting mechanism to prevent the laying of the thread in the needle hook by the looper, the .result being that during the last revolution of the cam shaft, the needle advances and casts ofi the loop of thread drawn through the work and is then retracted with its hook empty and is brought to rest out of engagement with the work, and where it will not interfere with the ready removal of the shoe.

rThe stopping mechanism, as indicate-d in the drawings, comprises a continuously slowly rotating clutch member 14 loosely mounted on the cam shaft and cooperating with a clutch member 16 mounted to rotate with the cam shaft and movable thereon toward and away from the clutch member 14. To cause the clutch member 16 to be moved into and out of engagement with the clutch member 14, the hub of the member 16 is provided with a cam groove which is engaged by ay roll on one end of a bell crank lever 18 pivotally mounted on the frame of thel machine. The other end ofthe bell crank is provided with a hole adapted to receive a locking pin 20. rPhe pin is mounted in the end of a slide 22 and is held in normal position by a spriiuY which surrounds a bolt 26,'extending from the rear end of the slide, and is held compressed between a Y the slide 22.

shoulder' on the slide and a sleeve 28 by a nut 30 which is carried by the bolt and bears against a lug projecting from the frame. The locking pin is normally held out of engagement with the bell crank lever by the treadle with which the pin is connected by a rod 32, the connection being made through a. latch lever 34 pivoted to the lower end or" the locking pin and adapted to bear against lVhile the treadleis depressed and the machine is in operation, the latch is held against the end of the slide 22 below a shoulder and the locking bolt is held out of engagement withthe bell crank lever, against the tension of a spring 38, as indicated in 1. The bell crank lever will therefore be oscillated idly by the cam groove in the hub of the clutch member 16, and the clutch members will remain out of engagement. lllhen the treadle is released to stop the machine the latch 34 will engage the shoulder 36 preventing upward movement of the locking pin until the treadle has moved upward sufficiently to enable the pin to snap into the hole in the bell crank lever when the hole registers with the pin. When this occurs, the continued forward rotation of the cam shaft, under momentum, causes the cam groove in the hub of the clutch member 16 to move the clutch members into engagement so that the cam shaft will be slowed down to the speed of the clutch member 14. In order to quickly check the momentum of the cam shaft, the cam groove, after moving the clutch members into engagement, acts to rock the bell crank lever and thereby move the slide to which the lever is then connected by the .locking pin, and

compress the spring 24 so that its force will bc exerted to press the clutch members together. The cam shaft is then driven forward at reduced speed until thecam groove, acting on the bell crank lever, moves the clutch member 16 out of engagement with the clutch member 14, thus bringing the -machine to rest with the needle in retracted position. The movement of the slide above referred to is utilized to operate the mechanfsm for shifting the looper as will be hereinafter explained.

The looper '8 is in the form of a lever which is tubular in whole or in part toform a passage for the thread and which is connected with a projection Y42, on the frame by a universal or ball joint 40 so that the thread carrying end of the lever may readily and easily swing in any direction. The looper operating mechanism comprises two independently movable actuators and a link connection through which the actuators impart :i movement to the looper, which is a resultant of the independent movements of the actuators. As shown the actuators comprise two cam operated levers 48 andvO and the link connection comprises a single three .cornered link 62, the forward end of which is connected to the looper lever by the ball and socket joint 64 and the rear ends of which are connected to the actuator levers by the ball and socket joints 58 and. 60 respectively. The actuator levers are mounted to oscillate freely upon a rock shaft 52 and are operated by two grooved cams 44 and 4G secured to the cam shaft 10 and engaging rolls 54l and 56 on the levers. As shown in Figs. 2 and the link 62 is provided with two rearwardly diverging arms, to the ends of which the actuator levers are connected, and is provided with a forwardly extending arm, the end of which is connected to the looper. he link receives forward and rearward movement from the actuator levers, and inasmuch as the levers are not moved in unison the link is also oscillated about one or the other of its rear ends so that the movement of the forward end of the link, and consequently of the looper, is a resultant of the forward andrearwa-rd, and of the sdewise movements imparted to the forward end of the link. By properly ,Shaping the cams 44 and 46 and properly proportioning the link and levers the lower end of the looper may be swung in the proper path to laythe thread in the hook of the needle.

In order to interrupt the action of the looper and cause the needle to mis-loop during the last cycle of operations of the machine provision is made for swinging the looper actuating link about its left rear end by imparting to the right end of the link an abnormal forward' movement, which shifts the looper toward the left side of the machine and into the position where it is ineffective to lay the thread in the needle hook. To accomplish this the actuator lever 50, on the right hand side of the machine, is mount; ed on an eccentric 66 keyed to the rockshaft 52 so that by rocking the shaft and shifting the eccentric bearing 66 forwardly the rear right end of the looper actuating link may be moved forwardly to swing the link about its rear left end and to cause its forward end which is connected with the looper to be shifted toward the left. The means for rocking the rockshaft comprises a segment lever 68 pivotally mounted at 70 on the frame of the machine and having its teeth meshing with the teeth of a gear segment 72 formed on the adjacent end of the rockshaft. The segment lever receives its movements from the bolt'26 carried by the slide 22 of the stopping mechanism. The outer screw-threaded end of this bolt projects through an aperture in the thickened upper portion of the segment lever. Segmental bearing faces are formed on opposite sides of the upper portion of the segment lever, one of which is engaged by the nut 30 on the bolt 26 while the other is engaged by a nut 74 on the outer end of the bolt 26. lVhen the treadle is released to stop the machine, and the stopping mechanism is thrown into operation, the resulting movement of the slide 22 is transmitted to the segment lever which rocks the roel-:shaft through the gear segment T2, thereby effecting the shifting of the looper'toward the left as above described. The position of the link and the looper after being shiftedis shown in Fig.

3. l/Vith the looper starting from this position the path of movement which itwill describe during the last cycle of operations will lie entirely to the left of the needle. The

shifting of the looper occurs before the needle has reached its advanced position and in time to prevent the laying of the thread in the needle 'hook and the looper will be permitted to complete its ineffective operation before the return movement of the slide acts to bring the looper back to its normal position, since the slide does not return until the needle has been retracted from the work at the end of the last cycle.

During the last revolution of the cam shaft, therefore the rockshaft will be rocked as the needle advances, thereby shifting the bearing or fulcrum 66, about which the bell crank 50 swings, to effect the oscillation of the link 62 and the shifting of the looper out of effective relation with the needle so that the thread will not be laid in the needle hook, rlhe hook 'of the needle will therefore be empty during its return movement and will be free of the -thread when it comes to rest in its retracted position. The machine is stopped with the mechanism for rocking the rockshaft in its normal position and consequently with'the looper in its proper relation to lthe path of theneedle to lay the thread in the needle hook as the needle adv vances. f v

yVhile itis preferred to employ the specific construction and arrangement of parts herein shown andvv described, it Will be understood that thisconstruction and arrangement is not essential to the broader features of the invention, and may be lvaried or modified as found desirable or best suited to the construction of the machine in which the invention is to be embodied.

Having explained' the nature and object ofthe invention, and described the preferred embodiment thereof, what is claimed is l; A chain stitch inseam sewing machine having, in combination, stitch forming mechanism including a hook needle and a looper, andk means acting automatically as the machine is stopped to bring the needle to rest out nof engagenieiitwvith the work at the end'of the last cycle of operations and tocause the looper to be shiftedfduring that cycle'so as to render its operation ineffective to lay the thread in the needle hook.

` 2. A chain stitch inseam-sewing machine having, in` combination,v stitch forming mechanism" including a hook needle and a looper v and mechanism for shifting the looper to such a position relatively 'to the needle that its operation during a cycle of operations of the machine will be ineffective to lay the thread inthe needle hook. 4 Y.

3. A chain stitch inseam sewingvmachine having, f in combination, stitch forming mechanism including a hook needle and a looper, and mechanism acting automatically as the machine is stopped for shifting the looper to-prevent the laying of the thread in the needle hook by the looper.

4. A chain stitch inseam sewing machine having, in combination, stitch forming mechanism including a hook needle and a looper, and mechanism acting during the last cycle of operations of the machine for shifting the looper to prevent the laying of the thread in the needle hook by the vlooper and for returning the looper toits normal position.

5. A chain stitch inseam sewing machine having, yin combination, stitch forming mechanism including a hook needle and a looper, and mechanism for causing the looper to perform its complete cycle of loop forming movements at one side of the needle during a cycle of operations so as to render said movement ineffective to lay the thread in the needle hook.

6. A chain' stitch inseam sewing machine having, in combination, stitch forming mechanism including a hook needle and a looper mounted with provision for loscilla-V tory movement in two planes, means for oscillating the looper to effect the laying of the threadiin the needle hook, and means for shifting the looper so that its oscillation will not effect the laying of the thread in the needle hook during a cycle of operations.

7. ,A chain stitch inseam sewing machine having, in combination, stitchA forming mechanism including a hook needle and a looper, the latter being mounted to oscillate in two planes, a pair of levers, means for independently oscillating said levers, a. link connecting said levers with the looper so that the resultant of the motion transmitted to said link: by said levers will be transmitted to the looper to eli'ect the laying of the thread in the needle hook, and mechanism acting automatically as the machine is stopped to shift the lulcrum of one of said levers to cause the looper to be angularly displaced so that the motion transmitted to it during the last cycle of operations will be ineffective to lay the thread in the needle hook.

,8. Looper mechanism for sewing machines having', in combination, a looper arm mounted to oscilla-.te in two planes, a pair ot levers, means tor independently oscillating said levers, and a linkconnecting said levers with said looper arm so that the resultant of the motion transmitted to said link by said levers will be transmitted to said looper arm to cause its oscillation in two planes.

9, Looper mechanism for sewing machines having, in combination, a looper arm mounted to oscillate in two planes, a pair of levers, means for independently Voscillating said levers, and a three cornered link having one of its corners connected with said looper arm, and having one ol" its remaining corners connected with one of said levers and the other of said remaining corners connected with the other of said levers sov that the resultant of the mo-tion transmitted to said link by said levers will be transmitted to said looper arm to cause its'oscillation in two planes.

l0. Looper mechanism for sewing machines having, in combination, a looper, two independently operated actuators, and link connection between the actuators and looper for moving the looper in an orbital path connected directly to the looper.

ll. Looper'mechanism for sewing machines having, in combination, a looper, two actuators, mounted for reciprocation in parallel planes and connecting means between the actuators and looper connected directly to the looper through which forward, backward and sidewise movements are imparted to the looper by forward, backward and differential movement ot. the actuators.

12. Looper' mechanism for sewing machines having, Ain combination, ,a looper mounted. on a universal joint, theaxes of which are substantially at right angles to the plane of movement of the thread carrying end of the looper, two independently operated actuators, and link connection between the actuators and looper.

1 3, Looper mechanism for sewing machines having, in combination, a looper mounted on a universal joint, two independently operated actuators, and three-cornered link connection between the actuators and looper.

lll. An inseam sewing machine, having, in combination, stitch forming mechanism including a hook needle and a looper consisting o' a tubular lever, a ball and socket joint supporting the looper, and mechanism Jfor swinging the looper to move its thread carrying end about the needle.

l5. Looper mechanism tor sewing machines having, in combination, a looper suspended on a universal joint about which the lower thread carrying end of the looperfmay swing in any direction, two independently operated actuators and link connection between the actuators and looper through which inoven'ient ot the actuators together in either direction imparts like movement to the end oi' the looper while dillerential nmveinent ot' the actuators imparts transverse movement to the end of the looper.

fin inseam sewing machine having, in combination, stitch forming mechanism including a hook needle, a tubular looper lever provided with a ball shaped bearing, a cooperating fixed socket, and means for swinging the free end of the looper lever in an orbital path.

17. An inseam sewing machine having, in combination, stitch forming mechanism includingl a hook needle, a tubular looper lever provided with a ball shaped bearing, a cooperating fixed socket, and means connected directly to the lever for swinging its free end in an orbital path.

18. An inseam sewing machine having, in combination, stitch forming mechanism including a hook needle, a looper mounted on a universal joint, the axes ot which are substantially at right angles to the plane of movement of the thread carrying end of the looper, and cams and connections for swinging the looper to move its thread oarrying end about the needle.

19. An inseam sewing machine having, in combination, stitch Jiorming mechanism` including a hook needle, a looper mounted on a universal joint, the a-Xes of which are-substantially at right angles tothe plane ot movement of the thread carrying end of the looper, and two actuators connectedto swing the looper to move its thread carrying end about the needle.

ALFRED R. MORRILL.

'i' Certificate of Correction.

It is hereby certified that in Letters Patent No. 1,543,265, granted June 23, 1925, upon the application of Alfred R. Morrill, of SWarnpsc-ott, Massachusetts, for an improvement in Inseam-Sewing Machines, anerror appears in the printed speciication requiring correction as follows: Page 4L, lines 50 and 51, claim l0, for for moving the looper in an orbital path connected directly to the looper read connected directly t0 the Zoope/r for mowing the Zoopcr n m orbital path; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 28th day of July, A. D. 1925.

[SEAL] KARL FENNING,

Acting yommz'ssz'oozer of Patents.

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