USRE2542E - stiles - Google Patents

Description

N. 0 snuis. Metal Punch,

Reissued Apr iI 21867.

Quinn fairs gaunt @ffiw.

NORMAN C. STlLES, OF WEST MERlDEN, CONNECTICUT.

Letters Patent No. 41,403, dated January 26, 1864; reissue No. 2,139, dated December '26, 1865; reissue No.

2,542, dated April 2, 1367. I

IMPROVED PUNCHING APPARATUS.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, N. C. STILES, of West Meriden, in the county of New Haven, and State of Connecticut, have invented certain new and useful improvements in Punching-Presses, applicable also to machines for other purposes; and I'do hereby declare the following, when taken in connection with the accompanying drawwhich said drawings constitute part of this specification, and represent, in-

Figure-1, a front elevation of the invention.

Figure 2, a longitudinal vertical section of the same, the line a: 9:, fig. 4, indicating the plane of section. Figure 3, a transverse vertical section of the same, taken in the plane indicated by the line yy, fig. 4. Figure 4, a horizontal section of the same, the plane of section being indicated by the line 2 z, fig. 2. Figure 5, a detached sectional view of the clamp and eccentric-disk for adjusting the position of the punch or cutter.

My invention consists in the employment of an adjustable eccentrically-bored box or piece, embracing the ordinary eccentric mounted in the tool-holder, or its connections and arranged in such manner that by moving this box, and'holding it in a different angular position, the levels between which thc'punch or cutter operates in. relation to the work can bc-convcniently changedwithout changing the extent of its motionhor involving any serious complication or (liliiculty. It consists further in the arrangement of a slide with triangular guides operating in two jaws, cast solid with the stock of the press, and held in place by a triangular gib or gibs, in such manner that all the bearing points or surfaces of the jaws and of the carriage can be planed olf by one operation, and without changing the position of the piece to be planed in the bed of the planing machine, and consequently all these surfacs must be perfectly parallel; and, furthermore, the set-screws used to adjust the gib orgibs bear square on a flat surface, so as to allow of setting and retaining said gib or gibs with thegreatest accuracy. It consists also in a touch-elf motion of peculiar construction mherebythe clutch-pin is movedby the direct action of the cam.- Further, in theguse of a loose clutch-pin, the position ofwhich is entirelycontrolled by the direct action of the cam, and is not made dependent upon springs or other mechanical devices. Also in the application of a yielding coupling-pin in combination with the clutch-pin and cam, in such a manner that if the clutch-pin is pushed out, when it stands'oppcsite to the coupliug-pin, thelatter will yield, and injury to'the working parts of the pr esswill be prevented. Finally, in attaching the cam motion to a yielding pin to ,prevent an accident in turning the pressback. To enable those skilled in the art to fully understand and use my invention, I will proceed to describe it. Punching-presses are of two kinds. In one the eccentric acts directly upon the slide, as in the well-known f Fowler press the other, by the introduction of a. pitrnan to connect the slide with the eccentric; to either of which my invention is equally applicable. A represents the stock of my press, which iscast of iron or other suitable material, and the upper part of which forins the bearing for the shaft B. One end of thisshaft carries the band-Wheel C, which rotates freely on it, and its other end carries the compound eccentric D, through which the motion of the shaft is transmitted to the slide E. The eccentric D consists of two distinct parts, one theeccentric wrist-pin a, or the other-the disk 6-, which is perforated with eccentric holes tofu; on the wrist-pin a. This disk fits nicely into the upper end of the pitman F, and a handle, 0, is connected with it in such amanner that it can befreely rotated on the wristpin a. By this operation the pitman F, and consequently the slide E, are raised or lowered, and the position of the punch-cutter, or tool which is intended to be inserted in the slide, can be set to any desir ed position in relation to the work to be punched or cut. The upper end ofthe pitinan forms a clamp, d, and, by screwing up the clamp-screw e, the disk is rendered rigid with the pitman, and the motion of the eccentric wrist-pin a is transmitted to the slide E. It is obvious that instead of the clamp-sc'rew other means might be pitman, and catching in cor-responding holes in the disk; or a key or wedge inserted between saiddisk and its screw will be the best and handiest way of screwing the disk in the desired position. As thus far illustrated,

ings and the letters of reference marked thereon, to be a full, clear, and exact description ofthe, same, and" employed to render thedisk b rigid with the p'itman, such, for instance, as a pin passing through a hole in the hearing; or the clamp-screw might be used incombination with such a pin 01'' key; but in most cases said clampmy invention is applied to that class oi presses in which the slide is moved by the employment of {L pitman. In presses in which the slide is moved without the employment of it pitmnn, the cccentric revolves in n box or slot formed in the slide.

To use my improvement in this class of presses it is only necessary that the box in which the eccentric revolves should be constructed so ".8 to form the clamp in like mtnnor as the pitmn-n F, and the box thus formed and clamped fitted into a groove or slot in the slide in the usual manner for fitting up this class of presses. The slide E moves up and down between two jziws, G, which are cast solid with the stock A, and the faces-g which form the bearings of the slide are triangular. By this shape of the slide end its barring feces, and byhaving the jaws cast solid with the stock of the press, I am enabled to plane the various sliding surfztces on each piece at one operation, and without changing its positiori on the bed of the planing machine. The slide isput on the bed ot' the planing machine with its front side down, and it will be easily understood by practical machinists how all the bearing c t-working faces can then be plancd'in one operation, and consequently they will all be perfectly parallel. In the some mu'nner' the stock of the press is fastened on the plnning-inachine, with the front side of thcjc n's G up, and all their working feces can lie-planed without changing the-position of the work. For the-- purpose of setting up the slide and causing it to move steady on its ways, I use a triangular, gib, h, which is set up by set-screws i. This gib offers a square bearing to the set-screws, as will be readily understood by referring-to fig. 4, and the slide can be adjusted with perfect accuracy. The touch-off motion consists of a, cam, H, which is pivoted to a. pin, j, and connects with a spring-oar, It. By pulling the springbar the point of the cum is forced up against the inner surface of the hub lof the bend-wheel C, end as this [wheel rotates, the clutch-pin m comes in contact with the cum H, and by the action of said cam is caused to slide out and to come in contact with the couplingrpin n, so as to impart motion to the shaft B. The clutch pin slides loosely in a recess in the hub of. the wheel C, and it is moved in and out entirely by the action of the cum. On pulling the spring-bar K the coin drops behind the spring-catch it, and is retained in that position until. the knob or ,butto'n'l, projecting from a collar, P, which is secured to the shaft B, comes in contact with said catch and-releases lthecmn. Y The coupling-pin n which, by notion of the clutch-pin m, transmits the motion of'theband-wheel C'tothe shaft B, is set upou-a spring, so that it can yield or recede in case the com is brought in such a, position that the clutch-pin is thrown out at that moment when it stonds opposite the coupling-pin.

In thiscase if the coupling-pin were rigid some part of the machine would break, or its motion would be stopped,

but with my yielding coupling-pin no such accident can take place. 'If the clutch-pin strikes the point of the coupling-pin the latter} recedes, and the motion of the band-wheel continues uninterrupted,causing the clutchpin to be pushed out, and on the next revolution the motion of the bend-wheel is transmitted to the shaft B. The fulcrum-pin j of the cam H is also rendered yielding, so that in turning the machine back when the clutchpin happens to be outth'e cam is-allowed to give way, and to let the clutch-pin pass without causing an accident. If desired, however, the clutch-pin, and also the cam, might be made with two points, so that said cam wouid be enabled to govern the position of the clutch-pin in either direction, and in this case the yielding fulcrum could be dispensed with.

By this invention a. punching-press is produced which allows of adjusting the position of the punch or cutter in relation to the work with ease and facility; which is provided with a. slide and ways, the working faces of which are perfectly parallel, and which cnnbe adjusted to work with perfect accuracy. Furthermore,

the motion of the press-and oi" the punch can be regulated and governed at pleasure, smd'adl the pnrts are so constructed that no accident cnn happen, however careless the operator having charge of the press. My machine maybe used for other purposes, butI- huvepreferred to describe it nsurranged for punching. I

What I claim as new, and desire to secure by Letters Patent, is as follows: 1. I clain the eccentric wrist-pin a, and turning part or -its equivalent, constructed and combined as described, to operate the punch at difi'erent levels, substantially as end for the purpose herein set forth.

2. I claim the V-shnped faces 9 in the slide E, in combination with the jaws G, cast solid with the stock A and with the triangular gib' h,-nll constructed and arranged as, and for the purpose syecified.

3. I claim-the touch-01f device lLarnmged in combination with the clutch-pin m, substantially as shown and described, so thatsnid clutch-pin is thrown in either direction by the direct action of the camj 4. I claim the loose clutch-pin m, applied in combination with the band-wheel C and Shad LB, nnd-with the adjustable operating inea-ns adopted-to moveit in and out by a. positive motion in the ,manncritnd for the pur-.

pose substantially as specified.

5. I claim the button l in the s-hsfi'B in combination with the spring-catch k, clutch pin in and n, and cam H, arranged substantially as described, so that the camisreleasedvautornsticsllyafter the-.puncli oreutter has completed its strok o.

6. I claim the yielding coupling-pin n, in combination with the clutch-pin m and touch-ottdevice k ti, constructed andoper'mting in the manneu'andfor the purpose substantinl ly as specified.

' I claim the yielding fulcrum-pin j, arranged incombi ation with thecsm l lclutchmiu 'm, and bandwheel C, substant'rqilty as aiid forthe purpose set forth.

In testimony whereof I huveihercnrito set my hand in the presence of two subscribing witnesses.

N. C. STILES.

Witnesses:

Gnoncs'lk. lint, CHAS. H. SHAW.

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