US142403A

US142403A - Improvement in punching-machines

Info

Publication number: US142403A
Authority: US
Publication date: 1873-09-02
Anticipated expiration: 1890-09-02

Description

J. M. LAUGHLIN. Punching-Machines.

Patented Septembgr2,1873.

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UNITED STATES PATENT OEEIoE.

JOSEPH M. LAUGHLIN, OF BOSTON, MASSACHUSETTS.

IMPROVEMENTJN PUNCHlNG-MACHINES. I

Specification forming part of Letters Patent No. 142,403, dated September 2, 1873; application filed November 18, 1872.

' To all whom it may concern the presser-l'oot or stock-holder, operated automatically by means of a suitable spring or springs, or their equivalents, inclosed or attached in a suitable manner to the head or plunger to which the dies are secured, of a lip upon the stock-holder to limit the extent to which the stock shall be introduced, and to hold the stock in its proper position during the punching of the same.

On the drawing, Figure 1 is a longitudinal section of the plunger, to which the dies are secured. Fig. 2 is a cross-section over the line a: w taken on Fig. 1. Fig. 3 is a section over the line 3/ y taken on Fig. 2. Fig. 4 is a side view of the presser-foot.

Similar letters refer to similar parts wherever they occur on the drawings.

a is the head or plunger on an ordinary punching-machine, to the lower end of which is secured one or more dies, 12 b, in a suitable manner, as shown. The drawing shows the dies as made for the purpose of punching horseshoe -nails, but my invention is likewise adapted for the punching of any other stock to equal advantage. In the head a. is made a recess, 0, in which the coiled spring (1 is placed that presses on a plate, c, attached to or slipped over the presser-foot bar f, as shown. The lower end of the presser-foot bar f is made forked, and projects below the dies b b when in its lowest position, as shown at g g on Fig. 3. h h represent the stock. It is a punched nail, and h is the stock that is to be punched.

As the head a, with the dies 1) b and the presser-feet or stock-holder g g, descends, the stock h It comes first in contact with the stockholder g 9 that keeps the stock firmly in position by the pressure from the spring. 01, and holds it so during the punching of the stock. When the head a is raised the dies 1) I) first rise above the stock it h, but the presserfoot y g continues to press on the stock, and only releases its pressure thereon during the time when the stock is fed; and as soon as this is done the head a moves downward, when the presser-foot g comes again in contact with the stock, and holds it in position during the punching of the same.

For certain kinds of work it may be necessary to provide one or all of the presser-feet g g g g with a lip, i, as shown in Fig. 3, by

the use of which the stock is prevented from spreading out during the punching of the same.

I do not confine myself .to the exact position of the presser-foot g g in relation to the dies or punches b b, as I may place the said presserfoot on one or both sides of the dies, as may be desired for different kinds of work. I do likewise not confine myself to the exact posi- Witnesses:

ALBAN ANDREN, GEORGE E. PnELPs.