US253390A

US253390A - johnston

Info

Publication number: US253390A
Authority: US
Publication date: 1882-02-07
Anticipated expiration: 1899-02-07

Description

(No Model.) I 5 Sheets-Sheet i.

E. H. JOHNSTON.

MACHINE FOR BENDING LINKS.

No. 253,390. Patented Feb..'7,1882.

(No Model.) Y 5 SheetsSheet; 2.

E. H. JOHNSTON.

MACHINE FOR BENDING LINKS. No. 253,390. Patented Feb. 7,1882.

N. PETERS. Pholwumngnpiwr. Washington, D C.

(No Model.)

5 Sheets-Sheet. 3. E H JOHNSTON MACHINE FOR BENDING LINKS.

No. 253,390. PatentedTebfi,1882;

5 Sheets-Sheet 4.

(No Model.)

B H JOHNSTON MACHINE FOR BENDING LINKS. "No. 253.390.

Patented Feb."7, 1882.

PETERS. Phdbljflwnpher, Washington. D. I;

(No HddeL.) 5 Sheets-Sheet 5. E. H. JOHNSTON.

MACHINE FOR BBNDING LINKS.

No. 253,390. v Patented Feb. 7,1882.

mumw I HQ. wxmvd am uw (5. (71%; 2 W W M/ZM/I/M/VM- I UNITED STATES PATENT OFFICE.

EDWARD-HI. JOHNSTON, on PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE WHARTON RAILROAD SWITCH COMPANY, OF SAME PLACE.

MACHINE FOR BENDING LINKS.

SPECIFICATION forming part of Letters Patent No. 253,390, dated February '7, 1882.

Application filed August 15, 1881. (No model.)

To all whom it may concern Be'it known that I, EDWARD H. JOHNSTON, a citizen of the United States, residing at Philadelphia, Pennsylvania, have invented certain Improvements in Ghain-Link-Bending Machines, of which the following is a specification.

The object of my invention is to rapidly convert a heated bar of iron into link-blanks for chains, the said blanks being so formed by the dies and mechanism described hereinafter that each blank is in a condition for introduction into the welded link of a chain preparatory to the welding of the blank itself.

In the accompanying drawings, Figures 1 and 2, Sheet 1, are views of the link-blank as finished by the machine; Figs. 3, 4, 5, and 6, diagrams illustrating the dies and the action of the same; Fig. 7, a plan view of the dies; Fig. 8, end views of the two main dies; Fig. 9, an inverted plan view of one of the dies; Fig. 10, a view of the dies and scarfing-knife; Fig. 11, a view of the bar tobe converted into the link-blank, the said bar and blank being drawn to an enlarged scale, while the remaining figures on Sheet 1 are drawn to a reduced scale; Fig. 12, Sheet 2, a plan view of the mechanism; Fig. 13, Sheet 3, a sectional elevation Fig. 14, Sheet 4, a side elevation; Fig. 15, Sheet 5, a transverse section on the line 1 2, Fig. 13, looking in the direction of the arrow 1, and Fig. 16'the same section, looking in the direction of the arrow 2, Fig. 13.

A preliminary explanation of the main feature of myinvention may be best made in connection with the views on Sheet 1.

Figs. 1 and 2 represent the link-blank made by the machine, this blank consisting of a rod,

. A, bent to a shape approximating to that of the desired link, the rod being bent at b, and the legs a a. being bent toward each other, as shown in the plan view, Fig. 1, and one leg being bent upward and the other downward, as

shown in the edge view, Fig. 2, while the ex-' treme ends are scarfed at b b, an opening being thus left between the two legs to admit a Welded link, after which the blank is flattened down and the two scarfed ends welded together, so as to form a complete link. The mode of making this blank is shown by the series of diagrams Figs. 3, 4, 5, and 6, in which B represents a fixed die, the upper portion, d, of which is of a size and shape corresponding with that of the interior oi the blank, Fig. 1, this portion d'terminating at a shoulder, e, which is inclined on one side in one direction for one leg of the blank, and inclined on the opposite side in a contrary direction for the other leg of the blank. This shoulder e in fact forms the bed by which, as shown in Fig. 2, the extent of the upward bend of one leg and downward bend of the other leg are determined.

D and E are two dies arranged to reciprocate in guides, the recessed portion f of the die E being made concave to correspond with the rounded end I) of the link. Upon the die E is a projection, i, having its under side, 'i, inclined to correspond with one of the inclinations of the shoulderc of the fixed die. The under side of the die in fact is made to conform with so much of the link-blank, Fig. 1, as is cross-lined, while the end of the die I) is recessed, so as to conform with that portion of the link-blank, Fig. 1, which is not cross-lined. A heated rod, .12, of the desired length of the link, being held in the position Fig. 3, the die E is moved toward the fixed die B, and this forms the bend I) of the link-blank, forces oneleg, a, of the link A, against the inclined shoulder e on .one side ofthe fixed die B, (see Fig. 4,) the other leg, a, of the link-blank being straight, or nearly so. The partly-formed link-blank is held by the dieE against the fixed die, Fig. 4, while the die 1) moves toward the fixed die B, which is so formed as to bend the leg a of the link blank downward to that inclined shoulderof the fixed die which is shown bydotted lines in Fig. 3, at the same time it forms the bend m, Fig. l, on the said leg at. Simultaneously with this operation the same die D bends the end of the log a inward, and the link is complete and confined to the fixed die by the two movable dies, as shown in Fig. 5. Immediately after reaching this position the two dies D and E are retracted, and the link- .blank is raised from the fixed die, as shown in Fig. 6, by a device explained hereinafter.

The dies, with their recesses, are shown in Figs. 7, 8, 9, and 10, Fig. 9 being an inverted plan view of the die E and the endview of the die D. Fig. 8 shows a recess, a, for forming the end of the leg a/ofthe link-blank, andarecess, p, for forming the end 111 of theleg a ofthe said blank but the best guide for the formation of the dies will be the link-blank, Figs. 1 and 2, as the dies must always conform with the said blank.

It will be seen that the two legs of the linkblank are scarfed at the ends, so that the scarfed portion of one leg will be brought into contact with the scarfed end of the other leg when the two legs are flattened down and welded. This scarfing is effected by a knife, F, which is attached to the die E, as shown in Fig. 10, in theinclined position shownin Fig. 8. The heated rod a2, Fig. l1,is passed through a suitable opening in a fixed plate, and the end of this inclined blade severs the baron the line g, this being the result of the first movement of the die E. The blank is thus scarfed at one end simultaneously with the scarfingof the end of the bar for another blank. Hence each severed section of the rod, as the latter is fed between the dies, must be scarfed at both ends before the dies convert the severed section into the link-blank.

Having explained the character and operation of the dies, I will proceed to describe the machine of which the said dies form a part.

The bed G, and the legs H H, which support the bed, constitute the fixed frame of the machine, and to this bed is secured a plate, I, on

which are guides q, for the bar'E", to the end of which is fitted the above-mentioned die E, and on the same plate are guides for thebar D, to the end of which the die D is attached, the fixed die B being fitted to an opening in the same plate, as shown in Fig. 13.

A horizontal shal't, J, is adapted to suitable hearings in the frame, Figs. 1 and 3, and on this shaft is a scroll-wheel, K, for actuating the bar E, which carries the die E, the rim of the wheel passing between a pin, 8, and an anti-friction roller, 8, on a pin on the under side of the said bar E. In like manner the rim of the scroll-cam K passes between a pin and anti-friction roller on the under side of the bar D, which carries the die D.

On the same horizontal shaft J is a cam, L, into the groove of which projects a pin on a cross-head, t, the latter carrying two guided fingers, u M, which pass through the enlarged portion of the die B, as shown in Fig. 6. A cam, M, Fig. 16, is secured to the shaft J, the edge of this cam bearing against the short arm of the bell-crank lever N, which is hung to the frame, and the long arm of which passes through an eye in the guided rod 1?, the cam tending to force this rod in one direction, and a spring, 1?, to force it in the opposite direction when released from the influence of the cam. The rod P carries a finger, y, the purport of which will appear hereinafter.

The heated rod :10 to be converted into links is passed through an opening in a block, w, secured to the plate I, and the proper position of this rod is determined by a stop, t, Figs. 12 and 15. The severing and scar-fing of this rod, and the conversion of the severed portion of the rod into a link-blank by the combined action of the dies have been fully explained above. Hence it will suflice to remark here that when the two dies D and E have been retracted the linkblank is raised by the fingers u uabove the central die, B, after which the finger 3 on the rod Pstrikes the blank from the fingers u a into a chute, W.

I claim as my invention- V 1. The combination of the reciprocating dies D and E and fixed die B, all constructed to form the link-blank A, substantially in the manner described.

2. The combination of the bar E and its die E, the bar D and its die D, with the shaft J and its cam-wheels K K, substantially as specified.

3. The combination of the fixed die B, the fingers a a, and knocking ofi' finger y with mechanism, substantially as described, for operating the said fingers.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EDWARD H. JOHNSTON.

Witnesses:

HENRY HowsoN, J r., HARRY SMITH.