Halogen incandescent lamp
AssigneeU.S. Philips Corporation
InventorHerbert Kamiel Maria Op de Beeck
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Abstract
The invention relates to halogen incandescent lamps for use in photoreproduction processes and with a simple and cheaper filament construction. In this construction the filament sections emitting light during operation form one assembly with the connection conductors interconnecting them and connection conductors of a large length have in one or more places helically wound turns which are shortcircuited by a support connected thereto.
Claims6
A halogen incandescent lamp having (a) a tubular light-pervious lamp vessel provided at its ends with vacuum-tight seals in which current leadthrough conductors are incorporated, (b) a filament which extends longitudinally in the lamp vessel and is connected to current leadthrough conductors and has several helically wound filament sections separated spatially by connection conductors, and (c) supports in contact with the filament and with the wall of the lamp vessel which fix the filament in the transverse direction, characterized in that filament sections and connection conductors constitute one structural unit and that at least connection conductors between filament sections which have a mutual distance of at least 40 mm locally have helical turns short-circuited by a support connected thereto.
Dependencies are inferred from the claim text.