US43818A - Improved power-press - Google Patents

Description

G. AWlLmlR.

POWER PRESS. v

Patented Aug. 9, 1864.

v TH: Nonms PETERS oo, wom-Limo., wAsmNoYoN, D. c.

@Nrrnn STATES PATENT OFFICE.

MOSES G. WIIJDER, OF MERIDIGN, ASSIGNOR TUHIMSFJF ANI) H; B.

I-lIGllLOW, OFNEW HAVEN, CUNNEU'IICUT.

iMPRovi-:D POWER-PRESS.

Specification forming part of Letters Patent Nofll i8, dated August 9, 1864.

this Specification., and represent, in

Figurel, a .frontview5 Fig. 2,a side view,v

and in Figs. 3 to/l 1, inclusive, detached views, to fully illustrate my improvements.

Similar letters and characters indicate corresponding parts in the several gnrcs.

f My invention relates to improvements in f machines styled power-presses,'which are used for cut-tin g, punching, Sec., and in which the punches, cutters, Sac., are fixed into a toolholder or gate, which has a vertical movement given it by an eccentric to raise and force down the tool-holder 5 and it consists,t`1rst, in driving .the gate or tool-holder by combining with an eccentric Wrist formed on the drivingshaft, an eccentric roll ltted to the wrist so that the said roll may revolve freely thereon, both the roll and wrist of an equal eccentricity, so that when the roll and wrist are in opposition to each other the center of the roll coincides with that et the shaft, and, if permitted, will revolve with the shaft, consequently imparting no motion, but holds the4 gate or toolholder at rest at its highest elevation, or, if the roll be held at its extreme or most distant eccentric radial point, so4 as to prevent its turning with the shaft, the throw of the ec centric wrist will ',be the same as Without the roll, forming substantially the head of a pitman in which the wrist revolves, and as the point of holding the said roll is moved from thc said extreme radial point to one less distant the throw of the wrist is diminished in like proportion as the radius isdiminished, by which combination and arrangement the toolholder, when at rest, always stands at its highest point or elevation, and the length of the throw may be diminished or increased; secondly, in the arrangement of a latch and lever to catch and release the eccentric roll for the purpose of connecting and disconnecting the gateortool-holder from the power, and by which arrangement the-clutch, universall y nseilaiu.l as universally condemned, is dispensed with; thirdly, in an adjustable friction-plate attached to thel eccentric wrist and pressing upon the roll with snliicient force to and for the purpose of overcoming` the friction ol' the roll within its strapA` which coin nects it to the pitmainso that when free it will revolve with the wrist within its strap concentric to the shaft, asbefore described.

To more fully illustrate my invention, I will describe its construction and operation.

A is the bed-plate; B, the frame or standard which .supports in proper bearings the drivingshaft G, and also the gate or toolholder D, which moves .in proper guides, E E. Thus far the construction and arrangement are similar to common and Well-knownl powerpresses, the tools, dies, Ste., inserted in like manner. Y

F is an eccentric wrist formed on the end ot'.

the drivingshaft U. (See Figs. 3 and 4.) On to the said wrist, and fitted so as to revolve freely thereon, l place an eccentric roll, l, ot the saine eccentricity as the wrist.

G is the pitman, its upper end forming the eccentric-strap c, and on i-ts lower end a connecting-pin, ll. (See Figs. 4 and 5.) Onto the gate ortool-holder D, I bolt or otherwise adj ustably secure a cradle, K, (see Figs. 9 and 10,) in which a seat, c,-is formed for the lower end of the pitniau to work in, and also a lin'k or box, d, int-o which the pin H sets for the purpose of lifting the gate. By raising the cradle and placing metal or other packing under it (as sec p, Figs. 9 and 10) the gate may be lowered or raised in proportion as the nacking is thickeror thinner.

fis a latch-bolt set in a groove formed in the pitman and forced up by a spiral spring, g.

Lis a lever hung npon'the top of the guide at l, and extends 'across the top and projects over the opposite side, which projection serves for a handle by which to move the lever. In Fig. el the said lever L is represented asinovcd back, and in Fig. 5 as move(` forward. On the latch-bolt'and near its upper end, I form a projection, (See Figs.4 and 5.) When the lever L is moved back, as in Fig. 4, the

4the Wrist is the same as it would be Were-.the

roll and pitman literally one piece. The driving-shaft being made to revolve while theeccentric ron is thus held, the eccentric wrist Will force the pitman down, as in red, Fig. 3," and of course thev gate with it to cut or punch, as may he, bring the lever L forward, as in Fig. 5, when, as the pitinan ascends, the pro-. jection on the latch-boltstrikes the lever, which prevents it (the latch) from rising farther with the pitman,'and consequently releases the eccentric roll, (as see Figs. 5 and 6.) In this position, released the eccentric roll stands concentric with the drivin gshaft, the frictionplate o on the Wrist (which is a metal disk of' larger diameter lthan the Wrist, with one or more screws through it into the wrist -to adjust its pressure upon theroll) presses onthe eccentric roll with sufficient forceto overcome l the-frictionof the roll revolving in the strap. Consequently the Wrist carries the roll Withit, and in consequence of their equal eccentricity the roll simply revolves in the strap concentric to the shaft, (as see Fig. 6, Where the Wrist isl represented'in black and red at its two extremes in a revolution.) Consequently 1 no movement is imparted to the slide, but it must rest always upa great advantage over the ordinary press, where the, slide may stop at any point within the limit of the eccentric, slip the lever back again, the latch springs up to the eccentric roll, and when the notch" therein comes around the latch `will spring into it and hold the roll as before. This said lever may he operated automatically b ymec-hanism. from the machine or by hand, or the foot of the operator.

As the movement of the pitman passing the dead-center is very slight vertically, so the horizontal movement of the pitman is greatest l 4at these dead-points.` Totake advantage of these well-known facts,'the. upper end of .the latch may be inclined, (as see Fig. 11,)'and-a corresponding incline formed on the lever, so that .the side or horizontal movement of the pitman, as shown in red,.Fig. Il, from right to left would tend to quicken theaction, if n'ot I to entirely operate the latch to release the ec-V centric, which, in some cases, may bea great advantage. i

I. donot claim the combination of an eccen- .tricroll and wrist-pin, as snchicombination is not new. Neither do I claim the combination of an eccentric roll and Wrist-pin for the pnrpose of adjustment in power-presses, as such combination foradjustmentis the invention` of N. C. Stiles, of Meriden Connecticut', as`

shown in a patentgranted to him, and dated January 26,1864. Therefore, y

Having thus fully described my invention, what I claim as new and useful, and desire t0- secnre by Letters Patent,.is- 1. The combination of the latch-bolt with an eccentric Vwrist and roll, when arranged lto44 catch andreleasethe roll, as and for the purpose specified. y

2. The-adjustable friction-plate described,in combination with the eccentricrolland wrist, for' the purpose specified. y

Mosns c. WILDER.

Witnesses:

\ GEORGE A. FAY,

E znA L. IlUBBARn.

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