US1145707A - Mounting for incandescent-lamp filaments. - Google Patents

Description

C. F. SCOTT.

MOUNTING FOR INCANDESCENT LAMP FILAMENTS.

APPLICATION FILED NOV. 2. 190B.

1 9 1 %5 W@? 0 Patented. July 6, 1915.

CHARLES F. SCOTT, 0F PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO WESTINGHOUSE LAMP COMPANY, A CORPORATION OF PENNSYLVANIA.

MOUNTING FOR INCANDESCENT-LAMP FILAMENTS.

Master.

Application filed November 2, 1908. Serial No. 460,567.

To all whom it may concern:

Be it known that I, CHARLES F. SCOTT, a

citizen of the United States, and resident of Pittsburgh, county of Allegheny, State of Pennsylvania, have invented certain new and useful Improvements in Mountings for Incandescent-Lamp Filaments, of which the following is a specification.

My invention relates to means for sup porting fragile filaments for incandescent electric lamps such, for instance as tungsten filaments. These filaments are very liable to be broken by any sudden shock or jar to which the lamps may be subject in handling and shipping.

My invention aims to provide a flexible or spring support for the arbor or carrier for the filaments so organized that sudden movements or blows to the lamp will be largely absorbed by the springs and not communicated to the filaments, and that such movements .as are so communicated shall cause as little strain as possible to be imparted to the filaments. The arbor is supported at or near one end by springs arranged in such a manner that from whatever direction the lamp receives a blow,the movement of the arbor tends to be in a direction parallel to itself. Among the advantages of supporting the arbor from one end instead of from both ends is the greater convenience of manufacture.

lln the accompanying drawing, I have illustrated my invention as applied to a lamp having several filaments mounted about a supporting arbor.

Referring to the drawing, 1 represents an ordinary incandescent lamp bulb, and 2 and 3 the usual leading-in wires. 'These two leading-in wires are connected with flat nickel springs 4: and 5 respectively, while a third similar spring is supported in the stem of the lamp. The three springs are radially arranged equi-distant from each other and the ends remote from the stem are connected with a glass ball or weight 6. In the drawing four filaments, 7, are shown as being supported by corresponding conductors, 8, carried by the glass ball 6, and looped through anchors, 9, which in turn are supported by an arbor, 10, also carried by or extended from the ball 6. In this manner the entire structure supporting the filaments is carried upon flexible springs which are so Specification of Letters Patent.

filament, a mounting therefor, means PatentedJuly c, ieia.

arranged that when the lamp is subjected to a sudden blow or jar, the arbor and the filaments are moved bodily. The method of supporting the arbor is such as to allow it to move in a. direction parallel to itself without bending over at the top, thus avoiding the strains which might otherwise come upon the filaments. A blow in the axial direction of the arbor is more or less absorbed by reason of the shape of the springs, which as shown are looped so as to permit a longitudinal movement of the arbor. Blows in any other direction will manifestly be cared for by the corresponding motion which the springs permit of. It should be noted that the weight or ball 6 serves in a measure at least to counterbalance the weight of the arbor and anchors as the springs 4 and 5 are attached to the ball 6 at or near the center of gravity of the filament supporting system, so that the tendency to a parallel motion of the arbor will be enhanced. By 10- eating the springs as far as practicable from the center line of the arbor, the longitudinal flexibility is increased and also the tendency of any tipping over of the arbor under the effect upon the lamp and are usually made as small as practicable.

The anchors 9 are flexible permitting more orless bending to accommodate any expansion and contraction of the filaments due to heating and cooling. These anchors may be made of rings of tungsten wire of a diameter considerably larger than that of the filament supported from the arbor by small nickel wire if desired. These latter may be flattened so as to afford the proper spring tension.

The invention is not limited to the particular manner of mounting the filaments upon the arbor which is herein described as other methods may be employed. Likewise other forms of anchors may be used.

I claim as my invention:

1. An incandescent lamp comprisingf a or locating the center of gravity of said mounting near one end thereof, and resilient means attached adjacent said end of the mounting and constituting the exclusive supporting means therefor.

2. An incandescent lamp comprising a filament,'a mounting therefor, means for locating the center of gravity of said mounting near one end thereof, and a plurality of symmetrically arranged resilient members that are attached ad acent said end of the mounting and constitute the exclusive supporting means therefor.

3. An incandescent lamp comprising a filament, a mounting therefor, means for locating the center of gravity of said mounting near one end thereof, and a plurality of symmetrically arranged and laterally proecting resilient members that are attached adjacent said end of the mounting and -conititute the exclusive supporting means there'- or. a

4. An incandescent lamp com rising a filament, a mounting therefor, an aplurality of symmetrically arranged andlaterally projecting resilient members that are attached toone'end only of the mounting and CHARLES F. soon. Witnesses: j

WM. H. 'OAPEL, H. C. TENER.

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