Electric lamp and discharge devices: systems – Current and/or voltage regulation
Patent
1995-01-23
1998-05-26
Font, Frank G.
Electric lamp and discharge devices: systems
Current and/or voltage regulation
315209R, 315241, 315244, G05F 100
Patent
active
057571449
ABSTRACT:
A power-line-operated frequency-converting power supply provides a 30 kHz current-limited AC voltage at an output receptacle. An instant-start gas discharge or neon lamp is connected across the secondary winding of a gapped ferrite-type leakage transformer, the primary winding of which is connected with the output receptacle by way of a light-weight cord, thereby permitting the lamp-transformer combination to be located remotely from the power supply. The secondary winding is arranged to have a well defined inductance; which inductance is tuned to resonate at 30 Khz by way of a parallel-connected tuning capacitor. Tightly coupled with the secondary winding is a control winding with which is connected a protection circuit operative to place an auxiliary capacitor across the control winding in case the neon lamp fails to ignite within a few milli-seconds, thereby detuning the secondary winding enough to protect the power supply and the leakage transformer from sustained overload.
REFERENCES:
patent: 4277726 (1981-07-01), Burke
patent: 4378514 (1983-03-01), Collins
patent: 4538095 (1985-08-01), Nilssen
patent: 5045760 (1991-09-01), Tevesinski
patent: 5134344 (1992-07-01), Vos et al.
patent: 5387845 (1995-02-01), Nilssen
patent: 5512801 (1996-04-01), Nilssen
Font Frank G.
Ratliff Reginald A.
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