US75388A - Thomas a - Google Patents

Description

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IMPROVMENT IN GARD-SETTING MACHINTRY.'A

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To ALL WHOM 1T MAY concern;

Be it known that I, THOMAS A. DrcmNsoN, of Worcester, in the State of Massachusetts, have invented certain new and useful Improvements in Card-Setting Machinery;- and I do herebyl declare the following to he a full and correct description of the saine, refcrcnce'being had to the accompanying drawings, in which- Figure 1 is perspective view of the portion of the machinery havingmy improvements.

Figure 2 is a detail view of the device for clamping the forward' end of the wre'whil'e theslide is drawn back to grasp itfor the next tooth.

Figure 3 is 'e similar view of the cylindrical cutter and pipe, the cutter being shown in section. The same letter indicates the same part wherever it occurs. l The nature of this invention consists in improvements in the slidefor carry-ing the wire; in 4the mode of' driving it, and in the devices for holding and ,cutting od" the wire, all as hereinafter more particularly set forth. To enable others skille'd in the art to make and use my improved machinery, I will proceed to describe its construction and operation, referring to the drawings by the letters of reference marked thereon.

A marks a stout frame, to which the operativo parts are attached; B, a wheel on the end of the main shaft, 1- revolved by means of the handle G, which indicates the driving-power. l) is the main shaft, near one end of .which is the cam E, shown in dotted lines in iig. 1, by which lever F is operated. 4A spring, i, draws lever F forward in counter-'ay '.ion of cam E. Lever F operates rod Gr, which is pivoted to the low'r arm of lever I, y which s xed'upon knife-shaft N, which rocks in its bearings as rod G moves backwards andforwards. K is a long spring, the free end of which is in contact with the upper and outer end of lever I., Except when thrownof by lever I, this spring constantly presses against the free end of thc spring-jaw L, which is thus forced against the round slide M to gripe the wire w. The round slide M isone ofthe peculiar features of my invention, its simplicity and chcapness of construction, as eompared with theordinary V-.slides, rendering" it animportant improvement. It reciprocates in guides O O, being driven backwards by the spiral springs, which surrounds it, and reacts against the headf on its outer end, and driven forward by the lever Q, to which l -it is attached by the link P and the slide z', to which that link, the slideM, and the spring-jaw L are attached'.

This slide rccprocates in ways in the frame O. The lever Q has its -fulcrum at g, and is driven by the cam R on the main shaft y i A slit in the slide M receives the wireto be driven, which is firmly held at thc forward end of the slide, between the slide and the free end of the spring-jaw L, while the spring K bears upon the jaw L. It is Vthus held while the wire is being driven forward. When the wire has been advanced tlic`distance necessary to drive a. tooth, the hold ofjaw L upon it must be released that the slide Mlmay move back upon the wire the distance rcquiredto form the nexttooth. While this movement takes place, the spring-K is forced backward .by the action of lever I, the upper end'of which hears against the free end of spring K. This relieves jaw L, which springs out of contact with slide M, and releases the wire from the gripe by which it was previously held. While thus released from jaw L, it is griped between two jaws, c (l, one of which, d, is fixed to thc frame A, angl thc' other, c, is attached to the free end of spring S. A screw, e, passes through spring S, and bears against a shoulder in the `upper end of lever I, (see fig. 2.) By the inward movement of the upper end of lever I the screw c is foi'ccdrback, and carries with it the spring S, which releases the wire from the gripe of the jaws c 'di From these .ja/ws the wire passes into a groove in pipe M', fig. 3, which lies within the hollow cylinder V, the forward end of which forms the cutter, by which, in conjunction with the oscillating-knife T, the teeth are severed from the end of the wire. The cutter-cylinder V is seen in section in iig.. 3. Its forward end is hevellcd, as shown, and, justwithin the hevclled end, is cut a V-shaped groove. g, which, with the bevelled end, forms a. sharp cutting-edge. Across the face of this cylinder plays the oscillating-knife T, `which is fixed to the end ot' the rocking-shaft N, operated by lever I, of which it forms the fulerum, passing through it at ln, lig. 2. The cylinder V can he turned upon the pipe M', so as to present, as often as may kbe required, anew cutting-surface when the edge has become dullat any point. When the whole circle has been thus applied, thev edge may be restored by grinding the hevelled end and renewing the groove g. A ring, f, is. applied to the end of the rou'nd slide M, and confined by a setscrew, x. Its ollice is to keep the wire w in place.

The operation is as follows Power being applied, the operative parts receive motion from the cams E 'and R on the main shaft D. The Wire w is inserted in the groove provided for it in the slide M, and is firmly held-between that slide end the spring-jaw L, by theoperation of spring K, u'ntil the slide M has advanced to the end of its forward stroke. At that pont`tl1elever I'px'esses,. the spring K back, so as to relieve the jan' L from its pressure, und release the wire. By the same movement of lever I the point of. the screw e is relieved from the pressure of the shoulder on the upper eiid of lever I, and the spring S (see iig. 2) brings the jew into close proximity to jew c, and {irmly`holds the wire w while the slide M makes its backward stroke. When this slide gets to the end of its backward stroke, the lever I is withdrawn from spring K, which at once closes the jaw L upon the slide M, and gripes thewire. By the same movement of lever I'tlie shoulder on its upper end presses back the screw e and spring S, opening the jaws c d, and releasing the wirefrom their hold. 'As

slide M again advances, the wire is driven through pipe M into the leather to form the card. At the end of each forward stroke vof slide M the oscillnting-lnifo T, acting in conjunction with the .concave sharp edge r/ of the cutter V, cuts off' the wire that has been set in the card.

Having thus fully described my improvements, what I claim, and desire to secure by Letters Patent, is-

1. The round slide M, constructed and operating es described.

2. The combination' of the slide M, slide z', link P, and lever Q, in the manner described.

3. The mode described of clamping the wire to tbe slide M by means of tbe'jaw L and spring K, oper 'ating as specified. l

4. The clamping-jawe c cl, operated by the spring S substantially inthe manner set forth.

5. The cutter-cylinder V, constructed and operating as described.

The above specification ot' my said invention, signed and-witnessed at oston, this 31st day of October,

THOMAS A. DICKINSON. l Witnesses: d

WILLIAM C. CLEveLANn, CHAs. F. STANSBURY.`

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