US1237847A - Process of manufacturing supports for electric-lamp sockets. - Google Patents

Description

E. L WHITE. v PROCESS OF MANUFACTURING SUPPORTS FOR ELECTRIC LAMP SOCKETS. APPLICATION FILED APR, 9. 1917 WITNESS:

H/SATTORNEYS Patented Aug. 21, 1917.

I {to f ce EDWIN Il- WHITE, OF BROOKLYN, NEW YORK.

PROCESS OF MANUFACTURING SUPPORTS FOR ELECTRIC-LAMP SOCKETS.

Application filed April 9, 1917.

To all whom it may concern:

Be it known that I, EDWIN L. WHITE, a citizen of the United States, residing at the borough of Brooklyn, in the county of Kings, city and State of New York, have invented Processes of Manufacturing Supports for Electric-Lamp Sockets, of which the following is a specification.

My invention relates to the manufacture of supports for the sockets of incandescent electric lamps, particularly to that character of socket supports for use in lighting fixtures for producing a semi-indirect lighting effect, in which the socket supports employed consist of an arm connected at one end to a lug, hanger or hook attached to a bowl, and provided at its free end with a hollow exteriorly threaded stud to receive the socket. In these supports as heretofore made the stud is a separate piece from the arm with an annular flange above the threaded portion, the metal above the flange being comparatively thin, which portion is inserted through a circular opening in one end of the arm and then upset over the top of the arm adjacent the opening to secure the two parts together. This upset edge often presents a sharp surface which causes injury to the insulation on the conductor wires passing through the opening in the stud; and furthermore the stud frequently becomes loose within the opening in the arm which renders it diflicult and sometimes impossible to attach a socket to it as the stud turns with the socket when an effort is made to attach such socket.

My present invention consists in the process of manufacturing socket supports of the character named in a manner whereby there is a large saving in material and time, and by which a support is obtained overcoming the danger of the stud working loose at its connection with the arm and presenting a smooth and enlarged passage for the conductor wires, thus avoiding any liability of injury to the insulation thereon.

The details of my invention are hereinafter particularly described.

In the accompanying drawing:

Figure 1 is a plan showing the article as it appears after the first step of my process.

Fig. 2 is a side view of the same.

Fig. 3 is a side elevation of the article after the second step .of my process.

Fig. 4 is a plan of the same.

Fig. 5 is a plan view of the article after Specification of Letters Iatent.

Patented Aug. 21, 1917..

Serial No. 160,879.

the opening in the bottom of the stud portlon has been made, and

Fig. 6 is a side elevation of the completed article.

In carrying out my improved process I take a flat strip of metal and place it between dies which cut out the form illustrated in Figs. 1 and 2 of the drawing. The flat solid end 10 of this form is then carried between a punch and die which depresses the center of such end into the form shown in Figs. 3 and 4. This form is then brought successively between two other punches and dies of slightly smaller diameter which correspondingly reduce the diameter of the depressed portion 11 and broaden and flatten the flange 12 surrounding the upper part of the depressed portion and on a plane with the arm 13. This latter operation also curves outwardly the upper interior of the depressed portion leaving a smooth surface terminating in the flange 12. The bottom of the depressed portion is then cut out by a cutting die leaving the article as illustrated in Fig. 5. The arm 13 is then bent at an inclination to the stud or depressed portion 11 and the exterior of the stud is threaded completing the process and producing the socket support illustrated in Fig. 6.

By the employment of my improved process there is much saving in material and cost of manufacture, a socket support is produced in which there is no possibility of the screw threaded stud becoming loose on the arm; the attachment of a socket is greatly facilitated and there are no sharp or rough edges to come into contact with the conductor wires to cause injury to the insulation thereon.

Furthermore the opening in the stud is enlarged, not only facilitating the insertion of the conductor wires, but permitting the employment of wires of larger diameter when desired.

I claim as my invention:

1. The herein described process of manufacturing supports for lamp sockets out of a single piece of sheet metal, consisting in cutting the blank by dies to form the arm with an opening at one end for attachment to a stud or hanger, and a flat solid rounded portion at the opposite end of the arm, depressing the center of said rounded end by the action of a series of punches and dies, cutting out the bottom of such depression, and threading the ext rior surface thereof.

2. The herein described process of manuby the action of a series of punches and dies factoring supports for lamp sockets out of leavinga'flanged rim thereon, cutting out the 10 a single piece of sheetrmetal, consistingin .bottomofsuch depression, bending the arm cutting the blank by dies to form the arm at an inclination thereto, and threading the with anmpening atone end for itsattach: aexterior"surface.ofrsaid depression.

ment to a hanger and a, flat solid rounded Signed by me this 16th day of March, 1917. portion at-theopposite end of the arm,'=d e v I pressing the center of said rounded portion EDWIN L. WHITE.

Copies of this patent may be obtained for fire cents each, by addressing the Commissioner of Patents,

I Washington, D. 0'.

Images