US1684838A - Wireworking device for stitching machines - Google Patents

Description

Se t; 18, 1928.

E. LES C HHORN WIREWORKING DEVICE FOR STITCHING MACHINES Filed Jan. 28, 1924 4 Sheets-Sheet Sept '18, 1928. 8 1,684,838

E. LESCHHORN WIRE WORK ING DEVICE FOR STITCHING MACHINES FiledJan. 28, 1924 4 Sheets-Sheet 2 J0 49 .50 min E. LESCHHORN WIBEWORKING DEVICE FOR STITCHING MACHINES Sept. 18, 1928.

Filed Jan. 28, 1924 4 Sheets-Sheet 5 mm E 18% Sept 13, 1928.

E. LESCHHORN v WIREWORKING DEVICE FOR STITCHING MACHINES 4 Sheets-Sheet 4 Filed Jan. 28,- 1924 (6f Jar/i041.

Patented Sept. 18, 1928.

ERNEST. LESGHHORN,

on onrcaeo, ILLINOIS, AssIeuo'I 'Io' LATHAIM'. menmnnr COMPANY, A CORPORATION OF ILLINOIS.

wmnwonxme nnvrcn son s'II-Icnme MACHINiIS.

Application filed January 28. 1924. Serial No. 688,908.

This invention relates to wire working devices for stitching machine.

One of the objects of the present invention is to improve and simplifythe operation of adjusting the feeding and cutting mechanism so that the machine may be readily ad usted to form and drive staples of various lengths with the least possible efl'ort'on the part of the operator. r

A further object of the invention is to provide a single means for simultaneously adjusting the feeding and cutting mechanism.

A still further object of the invention is to provide means for adjusting the feeding mechanism independently of and relative to the cutting mechanism.

A still further object of the invention is to provide a novel form of intermittently actuated wire feeding mechanism.

Fig. 2 is a side elevational view ofthesame. Fig. 3 is a top plan view of my improved stitching machine.

' Fig. 4 is a cross sectional view taken on the lines 4-4 in Fig. 1. I

Fig. 5' is a cross sectional view taken on the lines 5-5 in Fig. 1.

Fig. 6 is a cross sectional view taken on the lines 6-6 in Fig. 1. j

Fig. 7 is a cross sectional view taken on the line 77 in Fig. 1.

. Fig. 8 is a top plan view-of my improved intermittently actuated clutch mechanism with certain of the parts removed for the pur-- pose of clearness.

9 is a cross sectionalview taken on the lines 9-9 in Fig. 8, and

Fig. 10 is a detailedtop plan view of the construction of my cutter box.

For the purpose of illustration I have shown my improved stitching machine in connection with the usual type of stitcher head and staple forming and driving mechanism well known in the art. This mechanism- Astillfurther object of the invention is comprises the usual side plate or main frame 10 secui'edto and mounted on the arm (not shown) of the stitching machine in any well known manner. Rotatably mounted in the arm and plate 10 of the stitching machine is the usual driving shaft 11. Secured to the drive shaft 11 on the front side of the plate or main frame 10 is a cam 12, and Operatively connected to the cam 12 by means of a roller 13 engaging a groove 14 of said cam is the usual staple former 1-5. Operatively mounted within a vertically extending channel 16 is the usual vertically reciprocable staple driver 17 which is actuated in the channel 16 by the usual pitman 18 which has oneend thereof eccentrically connected to the cam 12, as shown at 19 and the other end thereof connected to the staple driver as shown at 20. The staple former is reciprocally mountsecured to the plate 10. Operatively mounted supporting mechanism which co-operate with the staple forming and drivingmechanism to complete the operation for forming and driving the staples into the work. The detail construction of this anvil and staple supporting mechanism has been omitted beed in a channel 21 formed in the block 22- in the path of the staple forming and drivmg mechanism is the usual anvil and staple cause this construction is old and well known in'the art,'an d per se forms no part of the present invention.

- The principal feature of the present invention is the provisionof single means for si-' multaneously adjusting the feeding mechanism and the cutting mechanism in such a manner that when the feed rolls are adjusted to vary the length of wire fed, the cutter mechanism is automatically and simultai1e- "ously adjusted in its position with respect to the staple forming and driving mechanism.

This mechanism comprises a transversely adj ustable cutter box 23, which is provided with a rearwardly extending portion 24, which is adapted to be slidably mounted in a horizontally disposed channel 25 formed in the lower end of the plate 10, as clearly shown in Figs.

5 and 6. The cutter box 10 may be locked. against horizontal adjustment by a locln'ng bolt 26. wh'ich extends through an aperture in the rear side of the platelO and in threaded engagement with the cutter b02123. Re-

no t

ciprocally mounted in a channel '27 in the- 7 side of the cutter box adjacent the staple forming and driving mechanism is a knife carrying member 28 which carries a knife 29 in position to sever the wire passing through the cutter tube 30. secured in the cutter box 23 by a set screw 31. The knife carrying member 28 is normally actuated to its uppermost position by a spring pressed pin 32 which is normally pressed upwardly by a compression spring positioned in a socket 33 of the cutter box 23 underneath the pin 32, see Fig. 10. The cutting member 28 is limited in its upward movement by a shoulder 29 formed on the block 22. The cutter mechanism is actuated to cut the wire in the normal operation of forming and driving the staples by a lever 34 which is'pivoted to the main frame or plate 10 by a screw 35. The free end of the lever 34 is provided-with a roller 36 which 'is adapted to engage an adjustable cam 37 adj ustably mounted by means of a set screw 38-and a pin 39. The lever 34 is operatively connected to the cutter member 28 by means of an adjustingscrew 40 which is in threaded engagement with a boss 41 formed on the lever 34. From the above description it will be seen that as the cam 12 is rotated by the drive shaft 1.1 the roller 36 is positioned in the path of the adjustable cam 37 in such a manner that as the cam is rotated the lever 34 is actuated downwardly and thereby actuates the cutting mechanism downwardly against the tension of the spring pressed pin 32 to sever the wire passing through the cutter tube 30.

In connection with my improved feeding mechanism I have provided a novel form of intermittently actuated feeding rolls in the form of a clutch which is adapted to be driven in one direction only. This comprises a rotatable member 42,journalled on a stud 43 secured to the main frame or plate 10 by a nut 44. This rotatable member 42 has formed integrally therewith gear teeth 45. The rotatable member is further-provided with an annular recess 46 on its rear side thereof and a tubular bearing portion 47. The periphery of the rotatable member 42 is provided wit-h a wire feeding surface 48 adjacent the front side thereof. This wire feeding surface 48 is increased in thickness by a washer 49 secured to the rotatable member 42 by means of screws 50. Rotata'bly mounted on the bearing portion 47 of the rotatable member 42 and positioned in the annular recess 46 is a rotatable clutch member 51. The rotatable clutch member 51 is provided with a plurality of peripherally arranged recesses 52. These recesses are provided with inclined bottoms as shown at 53, thereby forming a tapered recess between the elutchmember 51 and the outer wall of the annular recess 46 in rotatable member 42. Loosely mounted in these recesses 52 are a plurality of rollers 54 which are normally pressed ontwardlv on the inclined. surface 53 of the recesses 52 by compression springs 55, as shown in Fig. 8.

' By this construction it will be seen that as the clutch member is rotated in one direction, that is, in the direction opposite to the direction to which the springs 55 normally press the rollers 54 the rotatable member 42 will be caused to be rotated with the clutch member 51 by reason of the rollers 54 wcdging between the inclined surface 53 of the recesses 52 and the outer wallof the recess 46 of the rotatable member 42 and when the clutch member is rotated in the reverse direction the rollers 54 will roll down on the inclined surface 53 of the recess 52 toward the axis of the clutch member 51 against the tension of the spring 55 and thereby permit the clutch member 51 to rotate independently of the rotatable member 42. In other words, this construction permits the clutch member 51 to impart a rotary motion in one direction to the rotatable member 42 by the oscillatory movement of the clutch member 51. The clutch member 51 has secured thereto, on the rear side thereof by means of screws 56, a spur gear 57. The spur gear 57 and clutch member 51 is held in operative relation to the rotatable member 42 by means of awasher 58 which is loosely mounted in an annular recess 59 formed between the spur gear 57 and the clutch member 51. This washer is secured to the rotatable member 42 by means ofv screws 60. In order to hold the rotatable -member 42 against reverse movement I have From this construction it will be seen that the screw 64 maybe adjusted so that sullicient tension-may be exerted on the periphery of the rotatable member 42 in order to prevent its reverse rotation. Rotatably mounted adjacent to and (o-operating with the wire feeding surface or roller .48 l have provided a second roller 67. The roller 67 has formed integrally therewith or secured thereto a spur gear 68 which meshes with and is driven by the gearteeth 45 of the rotatable member 42. The roller 67 is journalled on a stud 69 secured to apivoted bracket 70. bracket 70 is pivoted to the main frame or plate 10 by means of a screw 71. The feed roller 67 is resilientlv held in co-operative relation with the feed roll 48 by having the free end of the pivoted bracket 70 resiliently and adjustably connected to the main fraim or plate 10 by a compression spring 72 and a pivoted bolt-73. The feeding mechanism is 1,0s4isss intermittently actuated by an oscillating sector 74 which ispivotally mounted on a stud 75 mounted in a socket 76 of the plate and secured therein by a nut 77, see Fig. 5. The sector 74 is provided with teeth 78 on its free end which are adapted to mesh with the spur gear 57 for imparting oscillatory movement to the clutch member 51. The sector 74 is actuated in its movement by the cam 79,

that as the shaft 11 is rotated the cam 79 is rotated into engagement with the roller 80, thereby causing the sector to swing outwardly in a direction away from the cam, imparting a counter-clockwise movement to the clutch mechanism 51 by reason of the teeth 78 ofthe sector 74 engaging the spur gear 57. In turn the counter-clockwise rotary movement of the clutch member 51 is imparted to rotatable member 42 causing the feed rollers 48 and 67 to engage the wire therebetween and feed the same to the staple forming and driving mechanism. I My improved mechanlsm for s1multaneously adjusting the wire feedlng and wire cutting mechanism will next be descr1bed.

The wire feeding and cutting mechanism are operatively connected toget er by a lever 85 pivotally secured to the plate or frame member I0 by a stud 86. The lower end of the lever 85 is provided with a recessed portion, as shown at 87, which is adapted to slid ably engage a pin 88 secured to a laterally extending portion 89 of the cutter box 23. From this construction it will be seen that as the lever 85 is oscillated about its pivot on the stud 86 the cutter box 23 will be horizontal-1y a'djusted in the horizontal channel or reeess 25 of the frame or plate 10. The upper port on of the lever 85 is provided with a bearing portion 90. Adjustably mounted 1n the bear- .ing portion 90 is a shaft 91. The inner end of the shaft or pin 91 is provided with an eccentrically mounted disc-like cam 92, WhlCll is adapted to contact with and form a stop for the sector 74 by engaging a pro1ect1on 93 of said sector in its return movement. Thls mechanism provides means whereby the wire feeding mechanism maybe ad usted mdependently of the wire cutting mechanism. This is done b providing a thumb screw94 which is keye to the shaft or pm 91 m any well known manner so that when it is desired to vary the home or return position with respect to the cutting mechanism the thumb screw 94 may be adjusted, thereby adjusting the eccentric disc 92 and varying the sto to which the projection 93 of the sector a 74 utts. When the proper adjustment of the thumb screw has been had the nut 95 is then tightened, which securely retains the eccentric disc 92 in thedesired position. In order to lock the lever 85 in various positions I have provided a bracket 96 which is secured to the plate 10 by means of screws 97.. This bracket is provided with an oifset portion, which forms a bearing support as shown at 98 for the forward end of-the stud 75. The lever 85 is secured in various positions of adjustment by having its upper end adapted to receive a bolt 99 which extends through an arcuate slot 100 formed in the lower end of the bracket 96. This bolt 99 is provided with a nut 101 which securely fastens the lever against movement after the proper adjustment has been attained; In connection with my improved stitching machine it will of course be understood that the stitching ma-. chme herein described is provided with the usual spools carried by the spindles on an arm connected with the plate or main frame of the machine and that the usual wire straightening device is also used in connection with my improved machine.

In theoperation of the above described device the shaft 11 operatively drives the cam 12 which in turn carries the cam 79 actuating the roller 80 causing the sector 74 to swing outwardly from the cam and through the clutch member 51 and the gear teeth 45 and gear 68 the wire is fed forwardly between the rollers 48 and 67 into the staple forming and driving mechanism. As the cam 79 is withdrawn from the roller 80, the torsional spring 82 normally returns the sector 74 to its home position in which'the projection 93 of the sector 74 engages the eccentric disc-stop 92. In the returning of the sector 74 it will of course be understood that by reason of the clutch mechanism 51 and rollers 54 the clutch 'member is permitted to return independently of the rotatable member 42, which is retained against reverse rotation by the friction band 61, as above described. I

Let us assume that it is desired to lengthen the staple. The upper end-of the lever is loosened by unscrewing the nut 101 and swinging the upper end of the lever toward the cam, thereby swinging the eccentric stop 92 for the sector 7 4 toward the cam and permitting the sector to have a greater oscillatory movement by the action of the cam 79, thereby causing the feed rollers to rotate through a larger angle of rotationcausing an increase in the length of the wire fed. When the upper end of this lever 85 is swung toward the cam itwill be noted that the lowerend is swung away from the staple forming and driving mechanismand thereby causes the cutter box 23 which is connected by the move laterally or horizontally from the staple pin 88 to the lower end of the lever to forming and driving mechanism and thereby simultaneously adjust the wire feeding mechanism with the cutting mechanism.

In this connection it will be noted that by reason of this connection between the cutting mechanism and feeding mechanism the feed: ing mechanism is adjusted to increase the length of wire ,fed a certain unit of length, the cutting mechanism moved simultaneously away in a direction horizontally from the staple forming and driving mechanism one half the unit of increased length of wire fed by the feeding mechanism. In other words, the cam stop 92 for limiting the movement of the sector 74 is so positioned on the lever 85 with respect to the connection of the lever with the cutter box 23 that the adjustment of the lever moves the cutter box toward or away from the staple forming and driving mechanism half the distance that the wire feeding mechanism-is adjusted to feed the wire.

In the event that there is any variation in the legs of the staple as finally formed the feeding -mechanism may be adjusted independently so that the length of wire fed by the feeding mechanism may be increased or decreased to correct these variations. This is done as previously described by varying the stop or return position of the sector 7 4,

which is done by adjusting the eccentric disc stop 92 through the mediumof the thumb screw 94 and locking nut 95.

While in the above specification I have described one embodiment which my invention mav assume in practice, it will of course be understood that modifications may be made from the" form herein shown and described without departing from the spirit and scope of my invention as expressed in the following claims.

Vhat I claim as my invention and desire to secure by Letters Patent is:

1. A wire working device for stitching machine comprising a frame, an adjustable wire feeding mechanism mounted on said frame, an adjustable wire cutting mechanism mount. ed on said frame, and a lever pivoted to said frame and operatively related to said feeding and cutting mechanisms whereby said feeding and cutting mechanisms may be simultaneously adjusted.

2. A wire working device for stitching machine comprising a frame, an adjustable wire feeding mechanism mounted on said frame, an adjustable wire cutting mechanism mounted on said frame, a lever pivoted to said frame and operatively related to said feeding and cutting mechanisms whereby said feeding and cutting mechanisms may be simultaneously adjusted, and means'carried by said lever for adjusting said fced-ing mechanism independently of said cutting mechanism.

3. A wire working device for stitching machine comprising a frame, a drive shaft mounted in said frame, wire feeding mechanism mounted on said frame and operatively connected to said drive shaft, wire'cutting mechanism mounted on said frame and operativelyconnected to said drive shaft, means for simultaneously adjusting said feeding and cutting mechanism, means for independently adjusting said feeding mechanism, and

separate means for adjusting said cutting mechanism.

4. A wire working device for stitching machine comprising a frame, wire cutting mechanism mounted on said frame and horizontall adjustable thereon, adjustable wire fee mg mechanism mounted on said frame, and connections between said feeding and cutting mechanisms whereby said cutting mechanism is horizontally adjusted one half the distance that the feeding mechanism is varied to feed the wire.

t3. A wire working device for stitching machine comprising a frame, a drive shaft mounted on said frame, wire feeding mechanism mounted on said frame including a plurality of feed rollers, an oscillatory clutch member operatively connected to one of said rollers, a sector operatively related to said clutch member, and means mounted on said drive shaft and engageable with said sector for operatively driving said feed rollers.

6. A wire working device for, stitching machine comprising a frame, a drive shaft mounted on said frame, wire feeding mecha nism mounted on said frame including a plurality of feed rollers, an oscillatory clutch member operatively connected to one of said rollers, a sector operatively related to said clutch member, and a cam mounted on said drive shaft and engageable with said sector for operatively driving said feed rollers.

7. A wire working device for stitching mament of said sector for varying the length of 115- wire fed by said feed rollers.

8. A wire working device for stitching machine comprising a frame, a drive shaft mounted on said frame, wire feeding mechanism mounted on said frame including a plurality of operatively related feed rollers, an oscillatory clutch member operatively related to one of said rollers, a sector operatively related to said clutch member, means carried by said drive shaft for actuating said 125 sector, and an adjustable stop for varying the oscillatory movement of said sectorfor varying the length of wire fed by said feed rollers.

9. A wire working device for stitching machine comprising a frame, a drive shaft 130 chine comprising a frame, a drive shaft" feeding wire mounted in said frame, nism carried by said frame including a plurality of feed rollers, a clutch mechanism carried by one of said rollers for intermittently feeding said rollers, a movable sector carried by said frame and operativelyrelated to said clutch member, means carried by said drive shaft for actuating said sector in one direction, and means operatively connected with said sector ,for automatically returning the same in the'other direction.

10. A wire working device for stitching machine comprising a mounted on said frame, wire feeding mechanism mounted on said frame including a plurality of operatively related feed rollers, an oscillatory clutch member operatively related to one of said rollers for intermittently between said rollers, a sector operatively related to said clutch member, means carried by said drive shaft for actuating said sector, and an adjustable stop fer varying the oscillatory movement of said sector for varying said feedrollers.

1 1. A wire working device for stitching machine comprising a frame, a drive shaft mounted in said frame, Wire feeding mechanism carried by saidframe including a plurality of feed rollers, a clutch mechanism the length of'wire fed by carried by one of said rollers for intermittently feeding said rollers, a movable sector carried by said frame and operatively, related to said clutch member, means carried by said drive shaft for actuating said sector in one direction, andspring actuated means operatively connected with said sector for automatically returning the same in the other direction. v

12. A wire working device for stitching machine comprising a frame, an adjustable wire feeding mechanism mounted on said frame, adjustable wire cutting mechanism mounted on said frame, a lever pivoted to said frame and having its'opposite' end portions operatively related to said feeding and cutting mechanism respectively for simultaneously adjusting said feedin and cutting mechanisms, and means carrie by said lever for adjustin said feeding mechanism independently o the adjustment of said cutting mechanism.

13. A wire working device for stitching machine comprising a frame, wire feeding mechanism mounted on said wire feeding mecha-.

frame, a drive shaft an adjustableframe, adjustable wire cutting mechanism mounted on said frame, a lever pivoted intermediate its ends to said frame and having its opposite end portions operatively related to said feeding and cutting mechanisms respectively for simultaneously adjusting said feeding and cutting mechanisms, and adj ust able means carried by one end of said lever for varying the amount of wire fed by said feeding mechanism, said adjustable means being operable independently of the adjust ment of said cutting mechanism.

14. A wire working device for stitching machine comprising a frame, a drive shaft mounted on saidframe, wire feeding mechanism mounted on said frame including a plurality of feed rollers, a sector operatively related to one of said feed rollers, means mounted on said drive shaft and engageable with said sector'for, operatively driving said rollers, wire cutting mechanism adjustably mounted on said frame, a lever pivoted to said frame and operatively related to said wire feeding and cutting mechanisms for dependently of said cutting mechanism.

15. A wire working device for stitching machine comprising a frame, a drive shaft mounted on said frame, wire feeding mechanism mounted on said frame including a plurality of feed rollers, a clutch member operatively connected to one of said rollers, a pivoted sector operatively related to said clutch member, means mounted on said drive shaft and engageable with said sector for operatively driving said feed rollers, wire cutting mechanism ad/justably mounted on said frame, 'a leyer pivoted to 'said'frame and having its opposite end portionso eratively related to said wire feeding and mechanisms respectively for simultaneously adjusting said feeding and cutting mechanisms, and adjustable means carried by one end of said lever and co-operable with said sector for varying the throw of thesector to vary the feeding operation of said wire feeding mechanism independently of the adjustment of said cutting mechanism.

In testimony whereof I have si ned my name to this specification this 22nd day of January, A. I). 1924.

ERNEST LESCHHORN.

cutting

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