USRE313E - Nut and washer machine - Google Patents

Description

UNITED STATES PATENT y OFFICE.

HENRY CARTER ANI) JAMES BEES, OF PITTSBURG, PENNSYLVANIA. y

NUT AND WASHER MACHINE.

Specification forming part ot' Letters Patent No. 8,3722, dated August 25, 1851 ReissueNo. 3 13, dated June 19, 1855. v

To all whom it may concern i Be it known that we, HENRY CARTER and J AMES REEs, ot' the city of Pittsburg,

county of Allegheny, and Commonwealth of machine.

In 'our machine the nuts are formed in succession from a heated bar ot' iron, and are punched and compressed into shape while the nut is on the punch, at one operation,within a box-die which surrounds the bla-nk and prevents it from being unduly strained during the operation of punching. The reducing of the punched blank to the proper shape requires, at the moment'it is effected, the exertion of a very considerable force. y our machine is eil'ected by c ompressingthe b ank between two dies, which are b oth moved in the same direction and by the same eccen tiic, but with different speed, and while the blank is upon thepunch. y

The machine represented in the accompanying drawings is double-acting, and consists of a strong frame, to which the several` acting members of the machine are secured. The frame is composed of two head-blocks, A A, which face each other, the two being situated at the opposite extremities o f the machine'. Between these two head-blocks, and at an equaldistance from each, is the block B, which supports the driving apparatus to which the power is applied. The block B is connected with each head-block by means of four strong bars, C C U C, which tie the whole together, and, with the head and middle blocks, constitute -the frame of the machine. The middle block, B, is hollow, and its opposite sides e a are perforated to admit ashaft, D, which'extends transversely through it, its journals being supported in suitable This operation in ously in the same direction.

machine, and is forced into the die-box I,

the cavity of`which is of a size and shape corresponding to that of the nut to be formed. Itis secured in a block, J which is made fast tothe four bars O C` C C. The bottom ofthe diefbox is formed by the counter-die K, which moves freely in the box, and whose face is the counterpart of the head of the nut. `This die isti/perforated to admit a smaller stationary punch, e, by means ofwhich the hole or eye isy formed in the blank. This punch is secured atits hinder extremity in the adjacent headblock A. Thecutting-die has a socket, i, in it to receive the piece punched out ofthe blank to form the eye. the piston G, and is fitted with a slid ing bolt, o. The latter has a key, r, in its hinder extremity, which passes through slots in the opposite sides of the piston, and, as the latter is moved inward or toward the shaft by the revolution of, the eccentric, strikes the face of the middle block` and stops the movement of thebolt o, while the piston still continues to move inward'. The die K, which shapes the head of the nut, is moved to and f ro by means of a lever, L, which is hinged at its lower extremity to a bracket, o, on the headblock, and is connected at its upperextremity with the eccentric-frame F by a rod, d. This lever acts upon the arms of across-head, M, which slides on guides f, and whose hub bears against and gives motion to the head-shapin g die K, allowing the latter to move backward as the cutting-die is advanced and forcing iti'orward as the cutting-die is withdrawn. The two. dies move simultane- A- notched disk, g, is secured to each side of the eccentric E, and two levers, h h., are Vpivoted to standards on the oppositeghead-blocks. Each lever ex. tends over one of the disks g to the die-block J beyond. It is here iitted with a bolt, j, which depends from the extremity of the lever and This socket is extended into raised to its uppermost position. The notched part of the disk is set in such a position with respect to the .eccentric that when the headshaping die reaches its most forward position the bolt j shall be depressed to strike the newformed nut and detach it from the face of the counter-die.

" When nuts are to be formed -with this mathine, the eccentric-shaft is` caused to revolve in the direction indicated by the arrow in the drawings by means of some suitable mechanical device which conveys power to it from the prime mover of the establishment. Flat bars, previously heated and sufficiently narrow to enter easily in the diebox, are thrust forward in front of the two cutting-dies H alternately until their extremities strike gage-blocks 5,.

which are secured to the die-blocks J, and limit the distance io which the bars can be thrust forward.

it from the rest of the bar. As the blank thus severed is forced into the die-box, it is forced' against the eye-punch c, which punches the metal from the center ot the blank'into the socket in the cutting-die. As the cutting-die continues to advance faster than the headshaping die can retrograde, the punched blank is squeezed between the two, and as this operai tion takes place as the eccentric is imparting the slowest longitudinal movement to the dies, and as the one die is retrogradin g half as fast as the other is advancing, a very great force `is at the moment exerted by this diti'erential movement to compress the blank into the'depressions ot' the head-shaping die, and thus reduce it to the proper form. As the eccen-;

tric continues to revolve, the cutting-die is withdrawn from the die-box, while by the samef operation the head-shaping die is moved for-v ward, and, shoving the iinished nut before it, expels it from the die-box. As the nut is thus protruded from the die-box, theV lever h is allowed to fall, and the holtj, striking the f nut, detaches it from the face ofthe die. vAs

the cutting-die continues to move backward,

the key T of the sliding bolt in the socket thereof strikes the face of the middle block, B, and stops its furtherY movement with the punch. As then the latter continues to move, the piece punched from the eye of the nut which was received in the socket of the cutting-die is ejected therefrom. VThe machine is now ready to form another nut from the heated As then each cutting-diev `moves forward, it forces the portion of the bar in front of it into the die-box, thus severing equal'in smoothness to bar, which is again fed up to the gage. As

the two cutting-dies act alternately, a nut is formed at each end of the machine by one revolution of the shaft. The punching and compressing of the blank are ei'ected, as above described, while the latter is within the die,

box. It is therefore supported at its sides by the sides of the die-box, which prevent the enlargement or straining of the nut under the actionof the eye-punch, and is compressed between the cutting and counter dies while the nut is on the eye-punch and within the die-box. TheV pressure given the nut while in the die-box adds greatly to its strength, as the fibers ot' the iron are rendered more compact, and the pressure coming direct on the flat way ot' the bar, the body or grain ot' the iron is not onlyy preserved, but greatly improved.

The method of forming nuts by punching and pressing in a close die-box at one operation isa great advantage, as nuts of a lperfectly symmetrical form are thereby rapidly produced, land all cracks incident to the cut-v ting or punching of it are thoroughly welded up, while the exterior ot the nut is forced so strongly into the molded faccs'of the dies that when discharged from the machine it is nearly a nut that has been planed. y Although in the operation of ourmaehine the nut is punched-andthen pressed between the cutting-die and counter-die while the nut is on the punch, yet the same result may be accomplished by a slight alteration in the movement given to the dies, and giving motion to the punch, so that thc blank severed from the bar may beiirst pressed between the two dies while in the die-box and punched while thus compressed, which would accomplish substantially the same result.

We are aware that Isaac H. Steer, about theyear 1840, proposed to make nuts by the process we have here described, but never complated a machine which would do this'auto- I tn atically. Therefore we do not claim this process m itself aud irrespective of machinery;

but, being the rst to construct a machine capa'- ble of making nuts by this process without any otheror further manipula-tion than is required for feeding in the bar ot' iron, f

- Vle claim as our inventionV and desire to secure by Letters Patent- The machine, substantially as herein described, for making nuts by cutting the blank from a heated bar of iron, punchingits eye in a closed die-box, pressing it into shape while in the die-box and on the punch, and then discharging it, as specified.

HENRY CARTE R.

'y JAMES REES.

Witnesses:

A. BAIRD, lakens.

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