US672939A - Anchor for electric-lamp glowers. - Google Patents

Description

No. 672,939. Patented Apr. 30, I90I. m. w. HANKS.

ANQHOR FOR ELECTRIC LAMP GLOWERS.

(Application filed Jun'e 16, 1899.)

and efficient manner.

UNITED STATES P TENT OFFICE.

v MARSHALL W. IIANKS, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO GEORGE WESTINGHOUSE, OF SAME PLACE.-

ANCHOR FOR ELECTRIC LAMP GLOWERS.

SPECIFICATION forming part of Letters Patent No. 672,939, dated April 30, 1901.

Application filed June 16, 1899.

To all whom it may concern;

Be it known that I, MARSHALL W. HANKS, a citizen of the United States of America, and a resident of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Anchors for Electric Lamp Glowers, of which the following is a specification.-

It is foundin usingincandescent-lamp glowers composed of rare earths or mixtures thereof that they lend themselves readily to much higher voltages than can be employed with carbon filaments, while the strength of the glowers is such that they can be made of considerable length without danger of breaking. It is, however, desirable at times to employ greater lengths than glowers supported only at the ends will conveniently sustain. In such cases it is entirely practicable to supplyone or more supports along the body of each glower, and the present specification is intended to describe an arrangement well adapted to accomplish this result in a convenient What I do in order to provide means for supporting a glower at one or more points along its length is to form onlargements upon or weld or fuse to the glower one or more lugs, preferably of the same material as the glower itself, and anchor the glower by securing an insulated wire or some other suitable device to the lug or enlargement and to some fixed portion of the lamp of which the glower forms a part.

I have illustrated my invention in the accompanying drawings, in which- Figure 1 is a side elevation of a lamp in which a glower treated as I have described above is an element, and Fig. 2 is a similar view of a lamp having a glower provided with two lugs or enlargements instead of one.

In the drawings, A is an electric incandescent lamp in which is supported a glower formed from a rare earth or a mixture of rare earths and connected to the lead-wires c c at its terminals 1) b. The glower shown is of high resistance, adapted to be operated by a high-voltage current. In order to insure the stability of the glower B, I weld or fuse to the Serial No. 720,760- (No model.)

middle thereof a lug 0, which may be of the same material as the body of the glower itself. I then join to the said lug by any of the known methods the end of the wire d and connect the other end to the body of the lamp A at a point where the said body will form an insulating-support for the said wire.

The method of attaching the lug o to the glower B may be any one adapted to the purposesuch, for example, as forming a lug of a suitable material independently of the glower and then molding and pressing it upon the glower and fusing or welding it thereto by means of an oxyhydrogen flame or an electric arc. Likewise the attaching of the wire 01 to the lug may be by any approved method, as by uniting the end of the wire to the lug through the medium of a conducting-alloy such as nickel-platinum, manganoxid-platimom, or the like. These are matters of detail which do not affect the central idea of my invention.

Instead of applying a single lug to the middle of a glower I may apply two ormore lugs at suitable distances along the glower, so as to furnish the best support, as illustrated in Fig. 2. Again, while I make use of lugs of the same material and composition as the glowers themselves, yet I may attach lugs made of a material and fuse or weld them to the glowers in the manner described. In some instances I make the attachment of the anchor wire or wires to the.glower directly without the employment of an intermediate lug or lugs, or one or more enlargements may be made at the points of attachment.

I claim as my invention 1. loan electric lamp provided with a normally rigid or inflexible glower formed from rare earth or a mixture of rare earths and having a lug of the same or similar material between its ends and a wire or rod attached at one end to said lug and at its other end to the body of the lamp.

2. An electric lamp provided with a normally rigid or inflexible glower having leading-in wires and provided at one or more points between its ends with lugs of the same or similar material and one or more anchoring-Wires anchoring wires or rods soeketed at one end connecting said lug or lugs with the body of in said lug or lugs. m the lamp. Signed by me at Allegheny, Pennsylvania,

3. A glower for electric lamps, the said this 24th day of May, 1899. 5 glowerbeingnormallyrigidandinfiexibleand MARSHALL W. HANKS.

formed of a rare earth or a mixture of rare Witnesses: earths, and provided with one or more lugs EDW. A. HESS,

between its ends or terminals and one or more OLIVER R. WEIMEMEYER.

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