Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Induction-type discharge device load
Patent
1996-07-17
1999-02-02
Kinkead, Arnold
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
Induction-type discharge device load
315344, 313153, 313154, 313161, H05B 4124
Patent
active
058669914
ABSTRACT:
An electrodeless gas discharge lamp includes a vitreous envelope containing a discharge medium. An excitation coil is positioned in relation to the vitreous envelope so as to excite the discharge medium therein. The excitation coil is adapted to be driven by an RF oscillator. The excitation coil has first and second ends and is effective for exciting the discharge medium to emit light with electromagnetic fields that are generated by the excitation coil. The excitation coil includes a first wire wound generally helically from the first end to the second end in a first helical direction to form first winding turns, and further includes a second wire wound generally helically from the first end to the second end in second helical direction opposite to that of the first helical direction to form second winding turns. Preferably, a generally cylindrical former is provided for holding the first and second wires between the first and second ends of the coil. Such former includes a positioning arrangement for maintaining specific positions of the first and second wires with respect to each other along the former.
REFERENCES:
patent: 4171503 (1979-10-01), Kwon
patent: 4727294 (1988-02-01), Houkes et al.
patent: 4977354 (1990-12-01), Bergervoet et al.
patent: 5349271 (1994-09-01), Van Os et al.
patent: 5387850 (1995-02-01), Bray et al.
Farkas Thomas
Farrall George A.
Grigor Gordon A.
Taubert Timothy A.
Wharmby David O.
Bruzga Charles E.
General Electric Company
Kinkead Arnold
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