Electric incandescent lamp
AssigneeU.S. Philips Corporation
InventorsGilbert Engels, Gregorius W. A. J. Brabers
Life of this patent
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Abstract
The electric incandescent lamp has a lamp vessel (1) in which a filament (3) is disposed substantially concentric with the longitudinal axis (2) of the lamp vessel (1). Current conductors (4) extend from the lamp vessel (1), an internal conductor (10) part of which is substantially concentrically with the axis (2) and has an end portion (11) having unround cross-sections (12). An end portion (6) of the filament (3) is wound onto the unround cross-sections (12) of a respective internal conductor (10) to constitute clamping windings (5). The lamp is of a simple construction to obtain reliably a concentrically mounted filament.
Claims6
An electric lamp comprising
- a light transmitting lamp vessel which is closed in a vacuum tight manner,
- a pair of current conductors in the lamp vessel, each current conductor having an end portion with an unround cross-section, and
- tungsten coil means comprising a pair of coiled portions which are wound in situ around respective said end portions of said current conductors so that said coiled portions are in substantially circumferential contact with said unround cross-sections.
Dependencies are inferred from the claim text.