US752583A - Lamp-reflector - Google Patents

Description

' No. 752,583. PATENTED-FEB. 16, 1904.

A. J. PARDRIDGE LAMP REFLECTOR.

I APPLICATION FILED APR. 11, 1903.

no MODEL.

Patented February 16, 1904.

PATENT OFFICE.

ALBERT J. PARDRIDGE, OF CHICAGO, ILLINOIS.

LAMP-REFLECTOR.

SPECIFICATION forming part of Letters Patent No. 752,583, dated February 16, 1904.

Application filed April 11, 1903.

To all whom it may concern:

Be it known that I, ALBERT J. PARDRIDGE, a citizen of the United States, residing at Chi cage, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Incandescent-Lamp Reflectors, which are fully set forth in the following specification, reference being had to the accompanying drawings, forming a part hereof, and in Which Figure 1 shows my said new device in central sectional elevation. Fig. 2 shows my said new device in plan view as seen from the top.

The object of my invention is to produce a simple, cheap, and eflicient reflector and shade for incandescent lamps, adapted to automatically adjust itself to the glass bulb of the usual forms of lamps now in use. My reflector is to be attached to the neck of the glass bulb, not to the socket thereof, and is held in place by the thrust on the springs against the socket, due to the tendency of the conical form of the portion of the springs to slip from the tapering end of the neck of the bulb, and is held laterally by the pressure of the softer outer or longitudinally-extended parts of said springs, which, as shown, he closely parallel to said neck. To attain said desirable end, I construct my said new reflector in substantially the following manner, namely: From a piece of thin circular sheet metal (steel preferred) are cut, from its center, a series of springarms 41 from an annular base or line 0. Said arms are turned upward or outward into the position shown in Fig. 1, and from about their longitudinal center, at s, to the outer ends said arms are made thinner than from said line to the base 0. At said outer ends are incurved parts 6, which act as pawl ends or stops, which rest against the fitting f for holding the reflector in'position on the globe g, and.

Serial No. 152,161. (No model.)

from said base-line 8 toward the line 0 said arms are more divergent and also more rigid than above said line 8. Said springs yield and adapt themselves to varying thicknesses of globes, and at the same time the free ends of said springs lie closely and hold the shade quite firmly in place.

The body a of the reflector is preferably quite flat in its cone shape and has an outer narrow and turned-down rim Z) to give both rigidity to the structure and an improved appearance.

What I claim is- 1. A shade for incandescent lamps consisting of a conical reflector provided with a downward-turned narrow rim at its base with apex consisting of a series of upturned springs whereof the upper half is, relatively, thinner than the lower half, said springs having their ends inturned, substantially as specified.

2. A conical lamp-shade reflector with apex provided with springs, said springs'forming an extension of said cone, whereof one part is thinned and of varying inclination from the other forming, thereby, superimposed frustums of cones of relatively different conicity, said cones forming a longitudinal extension of said reflector, substantially as specified.

3. The combination with an electrical lamp, of a conical reflector with central portion provided with springs divided to form superimposed frustums of cones of relatively strong and weak parts placed to form frustums of cones of relatively different conicity, said cones forming a longitudinal extension of said reflector, substantially as specified.

' ALBERT J. PARDRIDGE.

Witnesses:

WM. ZIMMERMAN, CARL TURNER.

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