US1371388A - Wire-stitching machine - Google Patents

Description

J. W. NASMITH.

WIRE STITCHING MACHlNE.

APPLICATION men SEPT 9,1919.

1,37 1 ,388. Patented Mar. 15, 1921.

JOHN WILLIAM NASMITH, OF MANCHESTER, ENGLAND.

WIRE-STITCHING MACHINE.

Specification of Letters Patent.

Patented Mar. 15, 1921.

Application filed September 9, 1919. Serial No. 322,757.

To a-ZZ TU/lcfll it may concern:

Be it known that I, JOHN WILLIAM. I" irrrr, a subject of the King of Great Entain, residing at Leegate, Heaton-Mersev, Manchester, England, have invented "l useful Improvements in firex cm i ching Machines, of which the following a specification.

This invention relates to improvements in wire-stitching machines, and more particularly to the type of machine in which the r'ze of the staple is fixed when the magit rming head to descend nip the material on a stationary anvil, during this descent the feed is made. head then remains stationary while the 'torming bar bends the staple and the driver ives it home, and means, usually in the m of a cam, are employed to hold the head or the forming-bar down during the operation of driving, and in order to allow for small variations in the-thickness of the material, arrangements are made to raise or lower the whole head and its mechanism. .riso in such machines the head or the fornr ing-bar remains down, clamping the material on the anvil until the driver has risen some distance after completing the driving of the staple, and prevents the operator from immediately displacing the material to posiit for the next stitch. It is desirable to e the brief time available for this displacement as long as possible. Finally it has not been usual in such machines to provide a support for the legs of the staple while it is being driven.

The objects cf the present invention are to simplify the mechanism by dispensing with the movement of the head, by using a single cam and lever to operate the stapledriver, and mounting on the end of the lever suitable means to operate the stapleformer, to combine with such means a frog or support for the staple while it is being driven, and to so arrange the mechanism that the frog, the staple-driver, and the staple-former shall all rise together and release the material the moment the driving the staple is completed.

These various points will now be described in detail with reference to the drawing, in which- Figures 1 and 2 are side and end .ele-

vations respectively, of the machine when at rest before the stroke commences.

F1gs. 3 and a are side and end elevations respectively, of the machine showing position of the parts at the moment the driving of the staple is completed.

Fig. 5 shows a small detail of the machine.

I will now describe my device, referring to the drawings in detail by reference numerals, the same numerals designating the same parts throughout the drawings.

A represents an avil, which is mounted for vertical adjustment on an arm R, adjustment being accomplished through the medium of an adjusting-screw 30, or by any other suitable means. The arm R is provided at its upper end with a horizontally extending portion in parallelism with the anvil A, and having formed on its outer end a head H. Pivotally mounted intermediate of its ends on an upwardly projecting extension of arm R, by means of the fixed stud S, is a lover L, having one end connected to a earn (3 by means of a pin 1, on which is mounted a roller B, adapted to ride in an irregular slot or groove M formed in the cam, the opposite end of the lever being connected with a driver I) slidably mounted in the head H. The cam is mounted for rotation about a stud P, fixed to the arm R, and has a projecting cam surface 3 on one edge thereof. Pivoted to the cam C by means of a pin 2 is a connecting-rod O, to the lower end of which may be connected a treadle, a power device, or any other suitable means, for actuating said rod, and thereby turning the cam C on its pivot. The groove 01' slot M in cam C has a portion M. which is curved on the arc of circle substantially concentric with the pivot P and a portion M eccentric thereto for a purpose which will presently appear.

Pivotally mounted at 31 on the arm R is a lever 5, to one end of which is pivotally attached a rod 33, at the forward end of which is carried a suitable means for feeding wire. This feeding means may be of any of the usual types well known inthe art, and is omitted inasmuch as it constitutes no part of the present invention. The upper end of lever 5 is connected to arm B through the medium of a contractile spring 34, by which the rod 33 is normally held retracted. Extending from the lever between the pivot points 31, and 32 is a pin on which the upper end of the staple-former i to be 7 described.

the roller 4: is mounted, said roller being adapted to press at all times against the edge of the cam C.

As the cam C moves from the position shown in Fig. 1 to that shown in Fig. 3, the roller B rides in the circular path and the lever L receives no motion, while at the same time the roller 4 rides on the projecting cam surface 3 moving lever 5, against the force of spring an and elfecting the feed. Simultaneously with the completion of the feed, the roller B begins to ride in the inclined eccentric portion l of the slot, driving the roller B upward and rocking the lever L, forcing the driver D downwardly.

Cast on the under side of the lever L are twoprojections 6 and 7, apertured to receive a rod 8, on the outer end of which is a block 9, arranged to rest against and slide on 'a finished face 10, on the under side of the lever. The outer face of the block 9 is inclined downwardly and rearwardly as shown at 11, for a purpose which will appear later. On the rod 8 is fixed. in a suitable position, a collar 12 and a spiral spring G is placed in compression between the collar and the projection 7, which forces the rod 8 and block 9 outwardly, until arrested by the adjusting nuts 13 abutting against the projection.

A stapleformer F is slidably mounted n a groove formed in the head H. and is tsclf grooved to receive the driver D. which s provided with an inclined surface 14, formed on the inner vertical face thereof.

The under face of the block on r until. as the lever L descends,describing an arc of a circle with the studs as center. it is drawn of? the top of the staple-former,

bottom of the staple-former l and the anvil. in order that the staple v -former maybe held firmly down on the mat al while the staple being driven by the continued descent of the driver l). the inclined face 11 of the bloclcf) force. down the inclined face 14:

at the top of the staple-former. against the n V Iorce of the spring (l which is further compressed so that the staple-former is firmly held down on the material, notwithstanding its tendency to rise under the influence of the. spring as will now be described.

Spring); Z is attached to one end of a lever 15 pivoted at 15 on the head H. having an arm 15 which projects below a roller 16, carried on a pin 17 fixed in a pendant 18. The other end of the spring Z is attached to the lower end of a lever 19 which swings on a fixed pin 20;

extending from. the head H, and presses a roller 21 carried on the lower end thereof iirnilv against the back of the pendant 18, tendine to hold a suitably formed frog or support ii projecting from its lower extremity in the forked lower end of the staple-former and consequently between the legs of the staple, whenceit is forced out by the descending driver as the staple is being driven. pendant 18 is formed with a slot 22 engagedv on a pin 23, fixed in the staple-former F.

Cast upon the pendant 18 is a projection 24; which is normally held by the tension of spring Z acting through lever 15, and tending to raise pendant 18, against pin 20 by which the upward movement of the pendant is limited. ever. is free to be raised further. and is limited only by the upper end of the slot 22. and is raised by means of a pin 25 The upper end, of the The staple-former F, howformed thereon which fits in slot 26 formed 7 in the driver D when the lower limit of said slot comes in contact with said pin. the

driver and former again ascends together .v standing; the spring Z. When the driver is no longer moving downward. but on the contrary. begins to rise. the stapleor F and the pendant 18 rise with it, sin e the force of'the spring G is not so .owering as to keep the staple-former l down. unless assisted by the friction of iding level- L. forcing the incline .1 the incline 14:. Therefore, all rise together and release the material lately the driving of the staple is They continue to rise together 1 the upward movement of the pendant sted by the projection 24 coming against the pin 20. The staple-former also ceases to rise (since sprii Z has ceased to act on it) until the continued rise of the and operate a support for the staple legs while the staple is being driven, and cause the staple-former to rise with the driver and give the operator the maximum possible to position the material for the next roke. X

i is SOZiEQtlIDQS required to have the anvil A very long, and the arms of the lever become oi-res ondingly long. In such cases the are described by the block 9 approxiic tcs to a straight line. it becomes difii lt by mean or" the nuts 13 to adjust prec l the moment when the block 9.slips off the top of the staple-former F, so as to coincide with the clamping of the material. several m ans may be devised to efiect this the required moment. One such means shown in Fig. 5. A. suitably shaped iece 27, is carried by and adjustable on the iraming and a projection 28 is formed on the collar and abuts against the back i the lever L to prevent turning. This pro- ,ection comes in contact. at the required moment. with the incline 27, which is so formed forced the block 9 off the top 0 it no longer contacts with the projecion :.8, but allows the incline 11 to press ,gainst the incline 1%, as shown in Fig.

l claim In a wire-stitching machine, a stationary head, a stapleformer and a driver slicahly mounted in said head, an anvil extending beneath said head, a cam and lever for operating said staple-former and driver, means on the end of the lever to force the stapletornier positively downward until a has been formed and clamped on said anvil and to hold it down while the driver descends to drive and clench the staple and means whereby the staple-former and driver commence their ascent simultaneously the moment the driving and clenching oi the staple is completed.

2. In a wire-stitching machine, a stationary head. 1 staple-former and a driver slidahly mounted in said head, an anvil extend ing beneath said head, a cam and lever for op -sting sai... staple former and driver, m s on the end of the lever to force the staple-former positively downward until a .Ple has been formed and cl "4 ed on said a; vil to hold it down wine the driver descends 5:0 drive and clcnch the staple and a pe dant attached to said staple-former sn g-pressed upward y whereby the staple-- m ner is raised simultaneously with the driver when the driving and clenching oi the st: le rare completed and the driver starts upwardly.

3. in a wire-stitching machine. a stationary head. :1 staple-former and a. driver slidably mounteo in said head, an anvil extend Eng beneath said head. a cam and lever for operating said staple-former and driver, means on the end of the lever to force the hat. having staple-former positively downward until a staple has been formed and clamped on said anvil and to hold it down while the driver descends to drive and clench the staple and a pendant attached to said staple-former hava frog extending therefrom to support said staple-former, said pendant being spring-pressed upwardly whereby the stapleiormer is raised simultaneously with the driver when the driving and clenching of the staple are completed.

In a wire-stitching machine, a station-- my head, a'staple-iormer and a driver slidably mounted in said head, an anvil extendbeneath said head, a cam and lever for operating said staple-former and driver, means on the end of the lever to force the s aple-former positively downward until a staple nas been formed and clamped on said anvil and to hold it down while the driver descends to drive and clench the staple, resilient means tending to raise said stapleformer when so held down whereby when the driver starts to rise the staple-former will rise simultaneously therewith.

5. In wirestitching machine, a stationary head, a stziple foriner and driver slidable vertically in said head, an anvil extending beneath said head, a cam and lever for operating said staple-former and driver, a spring controlled rod on the under side of said lever having a block on its outer end, said block being adapted to rest on the upper end of said stapleformer d to force it positively downwardly in said head into position to clamp stapleforming material on said anvil. when the lever is operated, said staplcformer being provided at its upper end with a rearwardly and downardly beveled surface, a corresponding surface on the forward end of the said block, the relation t the parts being such. that when said 0.2. former has reached a. position to grip said m ial the block will slide off the top of former and the beveled faces will cob'pe ate to hold the former in gripping position while the driver descends to drive the staple.

ln :2 wire-stitching machine, a stationall) upper end olt said staple-former and to iorce it positively downwardly in said head into position to clamp staple-forming material on said anvil when the lever is operated. said staple-former being provided at its upper end with a rearwardly and dowrwardl'v beveled surface, a corresponding surface on the forward end of said block, the relation of the parts being such that when said former has reached a position to grip said material the block will slide off the top of said former and the beveled faces will cooperate to hold the former in gripping position while the driver descends to drive the staple, and means whereby the staple-former and driver commence their ascent simut taneously the moment the driving and clenching of the staple is completed.

7. In a Wirestitching machine, a station ary head a staple-former and a driver slidable vertically in said head, an anvil located below said head, a cam and lever for oper' ating said former and driver, a spring controlled block on the under side of said lever, said block being adapted to rest on the upper end of said stapleformer and to force it positively downwardly in said head into position to clamp staple-forming material on said anvil when the lever is operated,,said staple-former being provided at its upper end with a rearwar'dly and downwardly beveled surface, a corresponding surface on the forward end of said block, the relation of the parts being such that when saidformer has reached a position to grip said material, the block will slide off the top of said former and the beveled faces will coiiperate to hold the former in gripping position while the driver descends to drive the staple. V

8. In a wire-stitching machine, a stationary head, a staple-former and driver slidable vertically in said head, an anvil extending beneath said head, a cam and lever for operating said stapleformer and driver, a spring-controlled rod on the underside of said lever having a block on its outer end, said block being adapted to rest on the upper end of said staple-former and to force it positively downwardly in said head into position to clamp staple-forming material on said anvil when the lever is operated, s'aid staple-former being provided at its upper end with a rearwardly and downwardly beveled surface, a corresponding surface on the forward end of said block, adjusting nuts on said rod whereby the relation of said block to said former may be regulated so that the block will slide off of the top of said former when the lower end of the former has reached a position to grip stapie-forming material in said anvil, and the beveled faces will cooperate to hold the former in gripping position while the driver descends to drive the staple.

9. In a wire-stitching machine, a stationary head, a staple-former and driver slidalole vertically in'said head. a cam and lever for operating said staple-former and driver, an apertured projection on the underside of said lever, a rod reciprocally mounted in said lugs, a block on the forward end of said rod, slidable against the under surface of said lever and adapted to rest on the upper end of said staple-former and to force it downwardly into position to clamp staple-forming material on said anvil when the forward end of the lever descends, said block and said staple-former being provided with complemental sloping faces, a collar on said rod and a compression spring between said collar and one of said projections for forcing said block forward, adjusting nuts screwthreaded on said rod whereby the tension of said spring may be adjusted so that the block will slide off the top of said former and onto the inclined surface of the former, at the time it contacts with the staple-forming material and means to adjust the tension of said springsuiiiciently to hold said former in clamping position while the driver descends to drive the staple.

10. In a wire-stitching machine, a stationary head, a staple-former and driver slidable vertically in said head, an anvil extending beneath said head, a cam and a lever for operating said staple-former and driven and apertured lugs on the under side of said lever, a rod reciprocally mounted in said. lugs, a block on the'forward end of said rod, slidable against the under-surface of said lever and adapted to rest on the upper end of saidstapleformer and to force it downwardly into position to clamp stapleforming material on said anvil when the forward end of the lever descends, said block and s'aidstaple-former being provided with complemental sloping faces, a collar on said rod and a compression spring between said collar and one of said proiections for forcing said block forward, adjusting nuts s rewthreaded on said rod whereby the tension of said snrinr may be adjusted so that the block will slide off the top of said former and onto the inclined surface of the former. at the time it contacts with the staple-forming material and to adiust the tension of said spring so as to regulate the force with which the block is forced against the inclined surface on the former.

11. In awire-stitching machine, a head, an anvil therebeneath, a cam and a lever and supporting means therefor, a former and a driver slidably mounted in said head, said former beinr; adapted to be brought into position to clamp staple-forming material on said anvil, a spring pressed block slidably mounted on the lower side of said lever and adapted to rest on the top of said former while the former moves into clamping position, an inclined surface on said former, a correspondingly inclined surface on said block, means for sliding the block off the upper end of said former onto said inclined surface when the former has reached clamping position.

JOHN WILLIAM NASMITH.

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