US258705A

US258705A - Thomas j

Info

Publication number: US258705A
Authority: US
Publication date: 1882-05-30
Anticipated expiration: 1899-05-30

Description

(No Model.)

T. J. BRAY. SHEARING ATTACHMENT FOR HEADING MACHINES.

Patented May 30, 1882.

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WWII! Name sses.

- Ivwewhw- N. PETERS, FhchrLiihognphnr, Washington a. c,

linemen Smarts THOMAS J. BRAY,

Paresrr rrren.

OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO OLIVER BROS. 8t PHILLIPS, OF SAME PLACE.

SHEARING ATTACHMENT FQR HEADING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 258,705, datedMay 30, 1882.

Application filed January 5, 18 82. (No model.)

To all whom it may concern:

Be it known that I, THOMAS J. BRAY, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, havednventcd a new and useful Improvement in Shearing Attachments for Heading-Machines; and I do hereby declare 1 the following to be a full, clear, and exact dcscription thereof.

My improvement relates to thatclass ofboltheading machines in which the heads of bolts and rivets are made by upsetting the heated end of an iron rod by means ofa heading tool or punch while the rod is grasped between holdiug-dies. The headed end of the rod is then out 01f to the proper length by a shear or cutter. It is important that the out be square for two reasons: first, if the end of the bolt is not cut off square, it is unsalable unless trimmed off, which causes a waste of material and time; second, if the end of the rod is not cut off square, the next bolt or rivet will be defective, because there is more metal on one side of the axis than on the other and, the head will be more on that side.

My invention consists in providing means for holding the headed blank square under the action of the moving knife.

To enable others skilled in the art to make and use my invention, I will now describe its construction and operation by reference to the accompanying drawings, forming a part of this specification, in which Figure l is a vertical cross-section of a heading-machine ofa well-known pattern taken on a line back of the dies. Fig. 2 is a rear elevation of the lever which carries the moving knife. Fig. 3 is a plan view, partly in section, on line a: as, Fig. 1, of the shearing devices. Fig. 4 shows the square cut made with my improved devices. Fig. 5 shows the diagonal cut made by the old form of shears.

Like letters of reference indicate like parts in each.

The heading-machine to which I have applied my improvement is a machine known as the Lewis header, and is of an approved form and in very general use. I have shown only those parts necessary to the attachment and operation of the shears. In Fig. 1, a is the power-shaft of theheader; l),thefly-whcel; c, the pulley, and d the gripping-lever.

Pivoted under the frame of the machine is an arm or lever, e, which is connected to and moved by the lever cl by means of a yoke or stirrup,f. i

On the opposite side of the machine is the cutting-leverg, which isjourualed at g, and receives its vibration from thelever 0, being connected therewith by a link, h, which extends between the levers e and g, and is connected to each by a pivotal joint, h.

The stationary knife t'is adjustably secured in a groove, 11, in the head j, in front of the upper end of the lever e. The end of theknife' iis recessed for the reception of the shank of 6 the bolt, and the under lip, 17*, extends outward to a length greater than the diameter of the bolt-shank, to afford a rest or bcarin g for supporting the rod when inserted to be out.

On the head jis a projection, 70, extending out parallel with the knife t, and in it is a gage,

l, which is adj ustable in its recess by means of a set-screw, Z, working through the top of the part 7. or by any other suitable adjusting device. The purpose of the gage l is to fix the length of the bolt or rivet, the rod being inserted between theknives untilthehead comes against the gage, where it is held while the cut is being made.

In the head of the cutting-leverg is the mov- 8o iug knife m, which is adjustable in its socket by means of thc'screw m. Set in agroovem, in the top of the lever g, is a plate, a, which in an angular extension or head, n carries a bar or stop, 0, which is adjustable by means of a 5 set-screw, o. The purpose of this stop 0 is to control the lateral movement or swinging around of the headof the bolt under the action of the moving knife. The stop 0 has agrooved face or end, as indicated by the dotted line, Fig. 3, to enable it to receive the convex side of the bolt-shank. The moving knife m is set so that it works past the outer edge of the sta tionary knife 2'. The stop 0 is arranged beyond the opposite side of the knife '0'. It may 5 be set as far from the knives as desired by adjusting the plate a by means of the slot n and screw a.

The operation is as follows: The gripping lever d has a vertical oscillation. The power 10: to oscillate the horizontally-oscillating lever g is transmitted from thelever cl by means of the lever c and link h. The movement of the lever g causes the knife on to work past the outer edge of the end of the stationary knife i. The rod of iron 12 is first heated, then headed, and then placed in the shearing devices in the position shown in Fig. 3, with the shank resting on the lip i and the head against the gage l. The knife m coming against the bar cuts it off square, the bar being held straight by the grooved stop 0, which, advancing simultaneously with the knife m, encounters the shank of the bolt or rivet p and prevents its swinging around, and holds it up straight while being cut off. The stop 0 is adjusted to the thickness of the bolt, so as to be somewhat shorter than the knife 9n, so that it will not bend the shank against the stationary knife 17.

It will be observed that as the stop and movable knife advance simultaneously and on opposite sides of the fixed knife, the bolt is carried squarely against the fixed knife, so as to insure an even or square cut.

Practical use has demonstrated fully the utility of my devices for the purpose. The bolts or rivets are out OK square, and the necessity of trimming the ends and the danger of making lop-sided heads are both obviated.

\VhatIclaim as my invention, and desire to secure by Letters Patent, is

1. The combination, in a metal-shearing machine, of a fixed knife, amovable knife, and a stop movable with the movable knife and arranged with relation to the knives, substantially as specified, to prevent the end portion of the rod from swinging around under them:- tion of the cutting-knife, substantially as and for the purpose set forth.

2. The combination, in a metal-shearing machine, of a fixed knife, a movable knife, and a laterally and longitudinally adjustable stop mounted on and adapted to move with the movable knife, substantially as and for the purpose specified.

3. The combination, in a metal-shearing ma chine, of a fixed knife and a gage mounted therewith, with a movable knife and a bearing-stop movable therewith, substantially as and for the purpose specified.

4. The combination, in a metal-shearing machine, of a fixed knife, a gage mounted with the fixed knife, a movable knife, and a laterally and longitudinally adj uStable stop mounted on and adapted to move with the movable knife, substantially as and for the purpose specified.

5. The combination of the cutting-lever with the gripping-lever of the header and an intermediate lever and link, substantially as and for the purposes described.

In testimony whereofI have hereunto set my hand this 31st day of December, A. D. 1881.

' THOS. J. BRAY.

Witnesses:

T. B. KERR, J AMES II. Poa'rn.