US84313A - Improvement in adjustable presses - Google Patents

Description

c. STILES.

Metal Punch. N o. 84,313. Patented Nov. 24-, 1868.

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is caused to work higher or lower. vices for this purpose have involved a con'iplication .may be carried out.

, NORMAN C. STILES, OF MID DLETOWN, CONNECTICUT.

Letters Patent N 0. 84,313,

am: Nc'vcmbm 24, 1868.

IMPROVEMENT IN ADJUSTABLE PRESSES.

The Schedule referred to in mesa Letters Patent and making pan: of the same.

Tc allwhom it'mag concern.-

Be it known that I, NORMAX C. sums, of Middle town, in the county of Middlesex, and State of Connecticut, have invented certain new and useful Iniprovements in Adjustable Presses, punches, and the like; and I do hereby declare that the following is a full and exact description thereof.

My invention relates to that form of adjustment in .which an eccentric .is employed, turned by the aid of a worm, so that as the eccentiic turned, the punch The previous de andii'iction which my invention avoids.

I will first describe what I consider the best means tor-marrying outmy invention, and will atter-wards designate the points which I, believe to lJe-lltW. The accompanying drawings form a part of this specification.

They represent two'forms in which the invention In the. one form a lever is introduced as a' means tbr communicating the force to the punching-die, and the centre or fiilcrum of the lever is mounted in the eccentric. In the other form no lever is employed, and the eccentric is mounted. in a link, which communicates motion front a crank-shaft to the die or punch.

Figme 1 is a side elevation, representing the leverform of the invention. '5

Figures 2 and 3 representenlarged views'of the lever; fig. 2 being a side-view, and fig. 3, a top view .of the lever.

Figure 4 is a side view of the other form of the invention, and

Figure 5 is an edge view of the same.

The figures represent the novel points, with so much hf the other parts as seems necessary in order to convey a clear understanding of the invention.

The parts not represented are made in the ordinary form,'-and will be readily constructed by mechanics.

Similar letters of reference indicate. corresponding parts in all the figin'es.

Tints are employed merely to aid in distinguishing the parts, and do not necessarily indicate materials. The materials of the whole may be iron and steel.

Referring tofigs. 1, 2, and 3, A is the fixed framework of the machine, a-nd B is apart to which a punch or die is connected. C is a stout lever, fitting between cheeks b b in the punch-carrier or die-carrier B. This lever C turns on a fixed or centre, I), which nay be made of steel, or other strong material, supported in the flame-work A, in any convenient manner. This axis D supports the lever C, not directly, but through the intervention of a stout wheel or eccentric, E, the axis or shaft D passing, not through the centre of the wheel E, butt'hrough-a point out of the centre, as indicated in the drawing. The wheel E is fitted scans :to be easily turned around in a correspondingholeiri' the lever G, and has a line of diagonal screw-threads on its exterior to receive the thread ofan endless screw or worm, G. This worm is provided with a head, 9, by means of which it maybe turned,'eithe r by hand or by any suitablean'augement otherwise. i

One or more check-nuts, or other devices not represented, may be employed to hold the screw, and thus to hold the eccentric very firmly in any desired position to which itmay beadjusted.

The end of the lever C, opposite to the punch-can rier B, receives an eccentric-segment,.H, as represented, which gears into another, I. This latter is oscillated by asteam-engine, or other suitable mech a-nisin, tm'ning-on the centre,

The segments Band I have teeth, as represented, which interlock and insure thoircoincidence of position, and have also rolling surf beyond the-teeth, which take the main strain inpperating the punch. v

The segments being struck, not from the centres-i and ll, but from the other centres, 'i' and h, it follows that as the segments oscillate, this end of. the lever C is pressed forcibly upward, and allowed to return, thus giving a corresponding motion to the punch.-

When, by turning thescrew G, the eccentric, E, is fixed in the position represented in figs; 1 and 2, the punch is carried at its highest position. j

When, by turning thescrew G, the eccentric E is 7 partially rota-ted so as to bring the arbor or axis D in a higher position relatively to the eccentric, it follows,

necessarily, that the centre of motion of the lever G, which is of course the centre of the eccentric E, is lower, and consequently the punch operates-at a lower level.

The back motion of the lever O and its connections may be effected by any convenient means. I have shown a weight, I, cast on thelever I, in such position thatits gravity performs this-function.

Referring to figs. 4 and 5, M is a stout link, whichcarries the punch or die, and suitable guides, not rep resented, at its lower extremity.

E is an eccentric, which receives in the hole represented the crank-pin N, of a stout crank shaft, O.

This shaft is revolved by any suitable power, not rep-' resented, and gives an amount of motion to the punch or die connected to the lower end of the link M, corresponding to the throw of the crank N, but the. elevation to which the reciprocations of thedie are cifecte depends on the position of the eccentric E.

This eccentric is provided with oblique teeth, or a toothed groove around its periphery, which receives the threads of the worm 0r endless screw G, turned by a handle or head, 9.

In this construction of the device the nut g serves to fix the screw G very firmly in any position desired.

hen it is required to operate the die or punch'at a. lower level, the screw G is turned in such direction as to rotate the eccentric-E to the right, which carties the crank-pin higher in the link, and consequently aces partially in sight, r

compels the link to descend lower at each rotation ofthe crank-pin.

If it is 'desired to operate the die or punch at a higher level, the reverse movement is efiected, In either case, the jam-nut g is first slackened, then the screw G is turned as many times as may be required, and the eccentric E is turned a corresponding portion of a revolution; then the parts are allowed to rest, and the jam-nut g is again tightened.

It will be of course understood that the bearings for the screw G, in the link M, are not threaded, but are cylindrical, as indicated by the dotted lines.

My invention may be worked out with many modifications in the form of the details here represented, and with many modifications in the relations of these parts, in the construction of the otherparts of the machine; I

The device may be worked with some success with- .out the jam-nuts g, or any equivalent to hold the worm Gin place. This is particularly practicable if the worm G is made with a time thread, a correspond ing thread being of course cut on the.surface of the eccentric E, and the parts are made to work stifiiy, or with a large amount offiiction; but I prefer to make the parts work as easily as is practicable without inducing a serious looseness or lossof motion in the parts, and to employ the jam-nut g, or its equivalent, to all the foiin y vent-ion, to hold the adjustment firmly in position, until it is desired to readjust the press or punch.

It maybe, for some purposes, preferred to extend the teeth to receive the worm quite around the eccentric E, as represented, but it is suflicient in most cases to extend such teeth only a little more than half way around.

It will be readily 'nnderstood that the provisions for being acted on by thethreads of the endless screw G,

which I here term teeth, are merely recesses in the periphery of the part E. By omitting them where they are not required, I obtain a broader, bearing on the periphery to communicate the force to the link 91' strap i I have marked the points where the recesses in the periphery may terminate by the letters 0 c andwthe recesses, teeth, or, in short, the threaded surface of the exterior of E, may extend quite around, as shown, or may extend from 0* around the upper half of the eccentric, terminating at 6 The patent to M. G. Wilder, dated May 28, 1867 describes aneccentric adjustment, but mine is substantially different therefrom. In Wilders machine,- after the machine has been properlyiadjusted, the supporting-pin is immovable, and the eccentric keyed to said pin, and thus made, as it were, in one piece with it, is equally immovable. This immovable eccentric is the true fulcrum of the lever, its periphery constituting the hearing or support around which the lever vibrates. In my machine, the eccentric is virtually integral with the lever! The lever, therefore, instead of vibrating on and around the eccentric, as in Wilders machine, vibrates on and around the supporting-pin.

Having now fully described my invention, What I claim as new, and desire to secure by Let'- ters Patent, is- The method herein described, or its equivalent, of adjusting and fastening the eccentric to the lever or working-pact, and allowing to the supporting orcrankpin freedom to rotate in the body of the eccentric, or in its own bearings, substantially as described.

N. (l. STILESI Witnesses S. A. ROBINSON, J. E. LATHROP.

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