Electric lamp and discharge devices: systems – With automatic shunt and/or cutout – Supply circuit current and/or potential actuated switch
Patent
1986-11-20
1989-07-11
Britton, Howard W.
Electric lamp and discharge devices: systems
With automatic shunt and/or cutout
Supply circuit current and/or potential actuated switch
315 97, 315106, 315107, 315185R, 315187, 315277, 315278, 315282, H05B 4116
Patent
active
048475360
ABSTRACT:
An attachment is provided for connection in fluorescent lamp circuits for reducing power consumption. The attachment is particularly designed for use with fluorescent lamp circuits having an encapsulated ballast including a transformer and capacitance. The attachment includes an isolation transformer with a capacitor and a resistor connected across the transformer, and an inductance connected in line with the primary of the ballast transformer with a resettable thermal switch connected to shut down the ballast transformer in response to high current overload conditions, and a surge voltage protection circuit connected through the thermal switch to shut down the ballast in response to a ballast power factor capacitor failure. The ballast and power reducer cooperate to produce a substantially square wave output resulting in increased system efficacy, reduced lamp lumen depreciation, and increased lamp life.
REFERENCES:
patent: 3500128 (1970-03-01), Liepins
patent: 3954316 (1976-05-01), Luchetta
patent: 4082981 (1978-04-01), Morton et al.
patent: 4135115 (1979-01-01), Abernethy et al.
patent: 4613792 (1986-09-01), Kroessler
Culwell William S.
Gooding Addison
Lowe Archie H.
Britton Howard W.
Duralux Industries, Inc.
Mosely Neal J.
Powell Mark R.
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