USRE2324E - Iprovement - Google Patents

Description

lUNITED STATES PATENT OFFICE.

GEORGE DUNHAM, 0F UNIONVILLE, CONNECTICUT.

l IMPROVEMENT IN MACHINES FOR MAKING NUTS.

Specification forming part ol`- Letters Patent No. 48,383, dated June 27, i865; Reissue N0. 2.324, dated July 31, 1860.

To all whom 'it may concern:

Be it known that I, GEORGE DUNI-I'AM, of Unionville, county of Hartford, and State ot Connecticut, have invented certain new and useful Improvements in N rit-Machines; and I do hereby declare that the same is described and represented in the following specification and drawings; and to enable others skilled in the art to make and use the same, I will proceed to describe it construction and operation by referring to the drawings, in which the same lettersintlicatelike partsin each of the iigures, the nature of which consists in the peculiar construction and operation 'ot the mechanism whereby I am enabled to size or gage the bar, cut the blank therefrom and bevel its corners, swage its edges, punch the hole, and iattcn the face without the use of a forming-pin, so that the nut will be completed while the metal is yet in a heated condition. First, gaging, cutting, holding, and beveling the corners of the blank; second, swaging the edges to form it into proper shape; third, punching the hole or eye of the nut and discharging it from the machine. Thus, after the machine is set in motion and two blanks have been cut from the bai-and each blank is passing through a separate auddistinct operation, each revolution of the driving-shaftwill cut a blank from the bar and discharge a nut from the machine.

In the accompanying' drawings, Figure l shows a front elevation.V Fig. 2 shows a lefthand end elevation. Fig. 3 shows a righthand end elevation. Fig. 4 shows a back-side elevation. Fig. 5 shows a top or plan view of the hed-plate, having the posts or frame-work broken ohL1 and removed, with the mechanism attached thereto.

A is the bed-plate. B are the legs or foundation which support the whole machine. C are the posts or frame-work, made orseeured onto the bed-plate, to which the mechanism above the bed-plate is arranged and secured. All of the parts employed, which constitute the framework of the machine, are designed to be made of metal proportionate in size and strength to the work which it is designed'to accomplish.

D are the driving-shafts. E is the pulley or crank by which the power is applied to the ma chine. F are gears, each of which are separately designated by Figs. l, 2, 3, Ste., which connect and transmit motion from one to the other of the shafts.

G are studs, posts, or hangers elevated above or hanging below from the bed-plate, to provide bearin gs or guides for the sliding', re-

volving, or vibrating partis of the mechanism. H are cams, each of which are separately designated by Figs. 1,2, 3, 85e. Those marked H H H2 are arranged upon the shai'tD. (See Fig. l.) H8 H5 HU' I-I"I are arranged upon the shaft D. (See F1g. 4L.) I-I3 H4 are. arranged on the shaft D2. (See Fig. 3.)

I is an arm or lever, one end of which is secured in the upper end of the stud G', and the other end is connected to the `punch-bar M by means of arms a a.. The cam H2 acts upon the upper end of the punch-bar M, to force the punch (in the lower end thereof) through the blank c directly under the clearer-bar N, and the cam H reacts upon the arm or lever I to draw the punch from the nut after it (the hole in the nut) has been punched, and while the nut is being held firmly in its place by means ofthe spring-opening iu the under side of the clearer-bar N while the punch is being drawn therefrom. l

In Fig. 6 the punch-bar M is shown with a removable cap, M. Between this cap and punch-bar is formed a square-thread screwsoclret,t',to receive the screw k,t'ormed on the upper end ofthe punch, and to hold the body ofthe y punch a firmly between the plate-surfaces of the scre\v-thread. By the use ot' this arrangement I am enabled to raise or lower the punch by turning it more or less any desirable distance at a time, and to accurately regulate thc point of its action, thereby removing all the difficulty heretofore existing of regulating the position of the punch, after grinding off the face end ot' the punch, by simply loosening the screws in the front plate, M.

J are anvil-blocks having passages or openings in the under side to allow the nuts to pass through and for the conveyers to work in.

L is a shear-bar secured to the sliding bar L, that works in ways formed in the front of the studs or posts G.

L is a plate secured in an adjustable manlner on the bed-plate in front of and adjusted closely to the face side ot' the shear-bar L, which two (L and L) form the shears for cutting the blank t'or a nutt'rom the barjust after it has been sized in the gage-press.

O is a sizing or gage-press plate operated by an incline plane or wedge, d, or its mechanical equivalent, having an arm, g, extended back so as to be movedin a given direction to force up the press-plate Oto sizethe bar (placed between it and the back side of the anvil-block J.) By means of an arm, e, attached to the shaft D', said plate not only sizes the iron, but it also operates as a gage to bring and hold the iron in its proper place, from which a nut is cut by the shear-bar L, until after said bar L descends and cuts oft' a blank-nut and presses it down its thickness below the lower edge of the nutbar. It also does away with the use of springs (which otherwise would be necessary) arranged one or both sides of the nut or rod from which it is cut.

K are swing swage-hammers for finishing up the nuts. The arms of said hammers K' K2 are attached to the hanging stud G7, and the arm of the hammer of K2 is hung to the stud G2, all of which are lifted or drawn back in readiness to impart a blow by the cams H3 H8 H6 by the action, respectively, of their springs or their equivalent motive incentives.

P is a spring or yielding table, onto which the blank drops or rests as it is cut from the nut-bar, the bed of which (the table) is arranged nearly in the center of a cone-shaped recess, so that as the shear-bar L cuts the blank from the bar it also continues its motion and presses the blank held between it and the yielding table-bed down into the cone-shape recess Q, thereby forming a bevel on the four corners ofthe face of the blank nut.

rIhe sliding bar L", on which the shear-bar L is arranged, is operated downward by the action of the cam Il until the blank is cut and pressed; then it recedes a short distance, and remains in that position long enough to allow the blank to be pushed forward by the springfollower to a point directly under and within the angle or shape of the anvil, and allow the follower R to return to its resting-place, (by

the action of a spring or its equivalent,) ready to push the next blank forward 5 then the cam allows it to rise or recede still more, and remain in that position until the bar is slid forward between the side of the anvil J and the gage or press `O, against a gage-block, when the gaging, cutting, and beveling motion is repeated as before. Said blank (now in the angle or shape of the anvil) rests between two spindle-holders, S, the upper one ofwhich, when depressed, fills loosely its bearings; but when lifted, it being (the spindle) made smaller just below its lower bearing allows it to play sidewise more or less without striking the bearings, thus avoiding the injurious effect which otherwise might occur from the blows of the hammers. The blank thus held between the holders is lifted upward directly against the face of the anvil by means of an angular lever, T, which is hung, nearly in the center, to the stud G7, one end of which extends forward, so as to lift the holder S, which is effected by the action ofthe cam H5 upon the rear end of said lever that extends back and up through the bed-plate. The blank, while in this position,

receives two blows from each of the hammers K2 and K', the holder, still having the blank, drops, by the action of springs or their equivalents, to their starting-point, when the spring push-bar u, by the action of the cam H", moves the blank forward into an opening formed in the under side of the clearer-bar N, directly under the punch, when the punch, by the action of the cam H2, descendslandjmakes the hole in the blank, and is, in turn, lifted from said blank by the joint action of the arm I and cam H', when the clearer-bar, by the action of the cam H4, draws the nut forward in front of the hammer K3, when the spring push-bar U' moves the nut from the spring-opening in the clearer-bar back directly under the hammer K3, which, by the action of the cam H, causes the finishing blow to be giventothe'gface of the nut, which then drops from the machine through an opening formed in the bed-plate of the machine just back of the hammer K3. Thus, as before stated, two nuts are continually in the process of being made and finished after the second blank has been cut from the bar.

I believeI have thus shown and described the d important characteristics of this my improvement, so as to enable others skilled to make and use the same therefrom, and so that the utility and advantage to be derived therefrom must be apparent to the mind of a practical mechanic.

What I claim, therefore, and desire to secure by Letters Patent, is

1. Constructing and arranging the sizingbar O so as to act in the threefold capacity of sizing, holding, and gagin g, actuated by proper mechanism, substantially as and for the purpose described.

2. The combination of the conical-shape recess Q- with the spring or yielding table P, substantially as and for the purpose described.

3. The combination of the shearing-punch L with the conical recess Q, substantially as and for the purpose described.

4. rlhe employment of the lifting-holders S S', substantially in the manner and for the purpose described.

5. The employment of the hammers K' and K2, or their equivalents, in combination with the holders S S, substantially as and for the purpose described.

6. The clearer-bar N, for holding, clearing, and carrying the nut from one point to another, substantially as described.

7. The screw upon the upper end of the punch K, in combination with the threaded socket t', substantially as described.

8. A machine constructed substantially as described, for cutting the blank, forming the bevel, and hammering or finishing the edges of a nut before the punching of the hole, substantially as described. l

GEORGE DURHAM. lL. s] Witnesses:

E. W. Buss, JEREMY W. BLIss.

Images