Electrode coil for discharge lamps and method for producing such

Electric lamp and discharge devices – Electrode and shield structures – Filament or resistance heated electrodes

Patent

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Details

Other Related Categories

313343, 313578, 313491, 313632, 140 715, H01K 114, H01J 6106

Type

Patent

Status

active

Patent number

057290814

Description

ABSTRACT:
The invention relates to electrode coils for discharge lamps having a coiled wire (1) which is wound around by a braiding wire (2). The coiled wire (1) has both turns (II) with an essentially circular cross-section and turns (I, III) with an oval cross-section. In order to produce the bar-shaped coil according to the invention, the unit comprising the coiled wire (1), the first core wire (3) and the braiding wire (2) is wound around a second core wire (4) which is flattened in places. Unrolling of the braiding wire (2) is prevented thereby. Production of the coil is cost-effective, since only two core wires are required and the coil ends are not fused.

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patent: 4277714 (1981-07-01), Keeffe et al.
patent: 4506187 (1985-03-01), Hoffman et al.
patent: 5258687 (1993-11-01), Duggan et al.

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