US1013962A - Filament connection. - Google Patents

Description

F. SKAUPY.

FILAMENT CONNECTION.

APPLIOATION FILED JULY 26, 1910.

1,@l3,962, Patented Jan. 9, 1912.

Witnesses: Inventor":

r-"anz. Skaupg,

His Jlttorneg.

UNITED STATES PATENT OFFICE.

FRANZ SKAUPY, F BERLIN, GERMANY, ASSIGNOR TO GENERAL EIEOTIBLIG COMPANY,

A. CORPORATION OF NEW YORK.

rILAMaN'r oolwnondiv.

Specification of Letters Patent.

To all whom it may concern:

Beit known that I, FRANZ SKAUPY, a subject of the Emperor of Austria-Hungary, residing at Berlin, Germany, have invented certain new and useful Improvements in Filament Connections, of which the following is a specification.

My invention relates to filament connec tions, and in particular comprises a novel scribed one embodiment of it as applied thereto; but I desire it to be understood that the embodiment described is merely illustrative and that'the invention can be otherwise carried out and applied.

When incandescent lamps are constructed with a number of separate filaments (in many instances of loop form), the latter are conductively connected according to the voltage at which the lamp is to operate. Commonly, either the individual filaments are all connected in series, or certain of them are connected in series and the series groups resulting are connected in parallel. The conductive elements serving to connect the several filaments frequently serve as points of support for their ends. These conductive elements or supports, hereinafter referred to as terminals, are, liable to become highly heated by the current flowing through them and by heat conduction and absorption from the adjacent highly heated filaments. The attainment by the terminals of very high temperatures is liable to have a bad efiect on the behavior of the lamp.

The embodiment of my invention hereinafter described comprises a terminal consisting of a strip of sheet metal arranged edgewise with reference to the axis of the lamp and the filaments connected to it; and

the portion of the terminal carrying the current is not arranged tangentially so as to afford the shortest possible path for the current, but in the form of a V, so that the current passes back and forth in a radial direction toward and from the axis of the lamp. The terminal as a whole ma conveniently have an approximately Y shape like that of a two-pronged fork. Such a ter- Patentedll'an.l),1912. I

minal has a large surface favorably disposed 0 for the radiation of heat; but the angular relation of this increased surface to the, filaments is the most unfavorable possible for heat absorption, so that it is practically effective only for radiation. At the same tlme, no more space is required than for other terminals. This form of terminal is also of advanta e for attaching and connecting the in ividual filaments,- allows adjustment of the distances between adjacent filament ends to be easily effected, alfords to the terminals a certain elasticity which is advantageous for the mechanical safety of the filament, and is simple and easy to construct. I

In the accompanying drawing, Figure 1 illustrates one form of incandescent lamp embodying my invention; Fig. 2 is a perspective view on an enlarged scale of one of the terminals shown in Fig. 1; and Fig. 3 is a similar enlarged detail of another form of terminal.

The mount of the lamp illustrated in Fig. 1 comprises a carrier consisting of an Oldlnary base or stem a through which the current supply conductors Z are introduced into the lamp and a standard I) attached thereto and forming a part of the filament supporting system. The individual looped filaments 0 are fastened at their ends to the terminals d in any usual or desired manner, as by welding, soldering, cementing, or even mechanically, as by squeezing. The terminals themselves are secured to the standard I), as by being fused into a lens-like enlargement e thereon. Holders 7 support the bights or curved portions of the filaments.

The form of the terminals d-preferably in one piececan be more clearly seen from Figs. 2 and 3, which illustrate on an enlarged scale two constructions embodying the invention. According to each of them the terminal comprises a strip of sheet metal bent anumber of times. The portions g which form the current conducting connections between the ends of the filaments have a cross-section corresponding to the intensity of the current to be carried and an amount of radiating surface likewise commensurate therewith. As the terd are placed in the lamp edgewise with reference to its axis and the direction of the filaments their exposure to the absorption of radiant energy is a minimum as tofuse them down into spheres in the interior of which the filament ends are embedded. This mode of connection affords a positive electric contact and constitutes a firm mechanical attachment for the filaments.

The constructions shown in Figs. 2 and 3 differ as regards the attachment of the terminals to the standard I). In the construction shown in-Fig. 2 tongue-like extensions 7?, i stamped out oi the strip of metal of which the terminal is formed and bent back upon one another serve for attaching-it to the standard of the filament supporting system. In the construction shown in. Fig. 3, the terminal is attached to the standard by a single projection 11 connected with it in an desired manner as by riveting or soldering.

What I claim as new and desire to secure by Letters Patent of the United States, is,

1. Ina filament mount, the combination with a plurality of filaments arranged adjacent a carrier of. a terminal connecting neighboring filaments which comprises a V member having its apex directed toward said carrier and supported therefrom by a projection from the apex of the V, the sides of the V being flat and having an extended surface in planes substantially parallel to the filaments and also having at their extremi, ties tubular sockets in which the filaments are secured.

2. A terminal for filaments consisting of a strip of sheet metal bent to the form of a V having a projection adapted for mounting the same consisting of a portion punched from said strip and extending in a direction from the a ex of the V opposite to that in which the si es thereof extend.

3. In a filament mount, the combination with a plurality of filaments mounted adjacent a carrier of a V member to the extremities of which the filaments are secured electrically connecting them, a projection from the apex of the V serving for attachment of said member to the carrler.

In witness whereof, I have hereunto set my hand this eleventh day of July, 1910.

FRANZ SKAUPY. Witnesses:

HENRY I-IAsPnR, WOLDEMAR HAUPT.

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