Electric lamp and discharge devices – Electrode and shield structures – Filament or resistance heated electrodes
Patent
1996-07-10
1998-03-17
Patel, Ashok
Electric lamp and discharge devices
Electrode and shield structures
Filament or resistance heated electrodes
313343, 313578, 313491, 313632, 140 715, H01K 114, H01J 6106
Patent
active
057290814
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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Hoffmann Roland
Weinhardt Erolf
Bessone Carlo S.
Osram Sylvania Inc.
Patel Ashok
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