US49937A

US49937A - Improvement in machinery for punching metals

Info

Publication number: US49937A
Authority: US
Publication date: 1865-09-12
Anticipated expiration: 1882-09-12

Description

D. T. WALKER.

, Meta Punch'.

No. 49,937. Patented-Sept. l2, 1865.

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UNITED STATES PATENT OFFICE.

DANIEL T. WALKER, OF BROOKLYN, E. D., NEW YORK.

IMPROVEMENT IN MACHINERY FOR PUNCHING METALS.

Specification forming part of Letters Patent No. 49,937, dated September 12, 1865,

To all whom fit 'may concern:

Be it known that I, DANIEL T. WALKER, of the city of Brooklyn, Eastern District, county of Kings, and State of New York, have invented Improved Machinery for Punchin g Metals 5 and I do hereby declare that the following is a full and correct description thereof', reference being had to the accompanying drawings, and to the letters of reference thereon.

My said invention consists in an improved punch-holder, and also of a peculiar form of punch to be used in the punch-holder.

In order to particularly describe my invenlion I will refer to the dra-wings, of which- Figure 1 is a longitudinal section, showing punch and holder, the red lines showing a modiication of construction which adapts the holder to different-sized punches; Fi g. 2, a perspective outside view of punch and holder as used; Fig. 3, a section of the cone or socket of the punchholder; Fig. 4, detached view of punch; Fig. 5, section ot' bush used for small punch.

The punch-holder consists of two parts, a and a. The large solid part, a, has a taper-shank, b, of suitable size to tit a taper hole or recess in the sliding bolster or head of a punchingmachine. Below the shoulder' c of the tapershank the piece c tapers down to a diameter equal to the largest punch-head for which it is intended. The hollow part a of the punchholder is also interiorly of a taper corresponding to that of the solid part a and the head of the punch c, which, it will be observed, is also conical or tapering in form.

The punch cis a short cylinder of steel, having a head, c', of a taper correspondin g to that of the hollow part, a.

When punches of a smaller size are to be used a conical bush, d, is necessary, unless the punch-head be made with a shoulder, which would be a waste of metal and work, as one bush will ontlast many punches.

The parts are put together as shown in the drawings, and secured by apin or key, e, driven through holes in the parts.

By this inode ot' construction the punch itseit' is reduced to a very small piece of metal and can be renewed at a triing expense, and yet a iirm and sufficiently-solid connection with a punchin g-niachineis obtained to punch boilerplate and other heavy plate metal. 'Ihe solid part a being in contact with the head of the punch becomes a driver of the punch in all cases, whether the punch is large or srnall. The hollow or conical part a is the cap to hold the punch to the driver, and also to hold the bushes when used. The red lines, Fig. 1,show the arrangement of bush and small punch.

I claim- 1. rIhe improved punch-holder, consistin g of the driver a, the cap a', and a fastening, substantially as described.

2. The driver, conical cap, fastening, and punch, in combination, substantially as described.

3. The conical bush, in combination with the cap and driver, for the purpose of holding various-sized punches in the same punch-holder, substantially as described.

DANIEL T. VALKER.

Vitnesses:

F. (l. TEEADWELL, Jr., JACOB DRAKE.