US311321A

US311321A - Egbert hoadley

Info

Publication number: US311321A
Authority: US
Publication date: 1885-01-27
Anticipated expiration: 1902-01-27

Description

(No Model.) h

R. HOADLEY.

MANUFACTURE OF ARTICLES 0P SHEET METAL FOR LAMP FIXTURES.

Unrrnn 'ra'rns arnnr tries.

ROBERT I-IOADIiEY, OF ANSON IA, CONNECTICUT, ASSIGNOR TO THE ANSON IA BRASS AND COPPER COMPANY, OF SAME PLACE, AND "WOLCOTT A.

HULL, OF NEWV YORK, N. Y.

MANUFACTURE OF ARTICLES 0F SHEET METAL FOR LAMP-FIXTURES.

SPECIFICATION forming part of Letters Patent No. 311,321, dated January 2'7, 1885.

Application filedJune 12, 1884. (No model.)

State of Connecticut, have invented a certain new and useful Improvement in the Manufacture of Articles of Sheet Metal for Lamp Fixtures, of which the following is a specification.

The object of this improvement is to facilitate the manufacture of articles of sheet metal such as are used in lamp-fixtures and are ornamented with embossed panels.

I will describe the improvement in detail, and then point out its various features in the claim.

In the accompanying drawings, Figure 1 is a side View of a press furnished with dies for carrying out my improvement. Fig. 2 is a sectional elevation of the dies on a larger scale. Fig. 3 is a partly-sectional front view of the dies on the same scale as Fig. 2. Fig. 4 is a face view of the male die on the same scale as Fig. 2. Fig. 5 is a face View of the female die on the same scale as Fig. 2. Fig. 6 is a face view of a blank to be treated by the dies, and on the same scale as Fig. 2; and Fig. 7 is a face view of an article treated by the dies, and on the same scale as Fig. 2.

Similar letters of reference designate corresponding parts in all the figures.

A designates a press, which may be of any suitable form. It willpreferably be operated by steam or analogous power. The male die 13 is stationary while in use. It is supported in a rest, C, which is erected on a table, D, secured to the frame of the press in such manner that it may be moved up or down. The rest 0 extends upwards obliquely to the height of the press. The shank of the male die 13 passes through the rest 0, and is secured therein by anut, E, applied to its rear end. It will be observed that the male die is arranged so that its axis extends obliquely to the height of the press. In shape the male die is approximately hemispherical in the present example of my invention. It has, however, at the inner end an enlarged cylindrical portion, a. At the uppermost portion it has a segmental portion bounded by radial grooves b and arc-shaped grooves I), crossed by interseating grooves b leaving isolated portions 0 b", which, as here shown, are of such shape and disposition as to represent the configuration of alligator-skin. The female die F has a concave face, c,which has ribs (2 (1 d corresponding to the grooves b 1/?) of the male die, and recesses dicorresponding to the portions Z1 of the male die. It is not material what the external contour of the female die shall be. As here shown it is of rectangular bar form. This die, as here shown, hasa dovetail shank, which is fitted into a dovetail groove in a holder, G, and secured there by a key, H, driven in between it and the holder. The holder G is secured to the plunger 0 of the press by a setscrew or other means passing through the plunger and acting against the shank of the holder.

Projecting from the rest 0, close to the side of the male die B, is a gage, I, consisting of a narrow rod or finger. This gage, as here shown, is secured in place by screws f, and tapers to a point. It will preferably be made of metal.

J designates a sheet-metal shell conforming in shape to the exterior of the male die. It is temporarily fastened to the male die by a screw, 9', passing through it and entering the male die. It is not clamped tightly to the male die by this screw, but is only fastened thereto loosely, so that it may be rotated by the operator upon the male die. The press is started, its plunger descends, and the shell J is stamped by the dies. Thus a segmental portion will be stamped, so as to produce a surface corresponding to the surfaces of the dies. It will then have in the exterior of this segmental portion grooves h h if, corresponding to the grooves b b Z) of the male die, and portions hfleorresponding to the portions b of the male die. After the plunger has been 0 raised the operator turns or rotates the shell J'upon the male die till the nearer of the two grooves h comes in line with one of the sides of the gage I. If necessary, he may stop the press to afford him sutficient time for thus ad- 5 justing the shell. After the adjustment of the r 5 I rib-like portions, 7:,wl1l strengthen the shell in male die the plunger is caused to descend again, whereupon another segmental portion of the shell Willbe stamped. These operations are repeated until the shell is stamped all around the circumference. lVhen finished, the shell Will have the appearance represented in Fig. 7. It will then have a number of segmental portions separatcd by rib-like portions. The shell J is now removed and another is arranged in its place.

By my improvement I amenabled to stamp the shell in panels, so as to have the panels meet properly all around the circumference of the shell. The port-ions 7L3 strengthen the shell in various directions, and the intervening radial directions, or, in other words, from the central portion to the edge. The appearance of the shell will also be highly ornamental.

What I claim as my invention, and desire to secure by Letters Patent, is

The process of stamping a sheet-metal shell consisting in stamping a segmental portion, in turning the shell a certain distance, in then stamping anothersegmental portion,leaving an intervening rib-like portion between it and the first stamped segmental portion,and in proceeding similarly until the shell is stamped entirely around its circumference with segmental portions having intervening rib-like portions between them, substantially as specified.

ROBERT HOADLEY.

\Vitnesses:

A. S. TERRY,

BiDo'rY.