Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Periodic switch in the primary circuit of the supply...
Patent
1985-12-05
1987-12-29
Chatmon, Saxfield
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Periodic switch in the primary circuit of the supply...
315DIG5, 315DIG7, 315307, 356313, 363 23, 363 25, 363134, H05B 3702, H05B 3904, H05B 4136
Patent
active
047163429
ABSTRACT:
The circuit includes an inverter to be connected to a source of d.c. power. The inverter has a transformer with a center-tapped primary winding. Separate controllable switching devices are connected to the respective ends of the primary winding. Both switching devices are arranged to be connected in common to one output terminal of the d.c. power source. The center tap of the transformer primary winding is arranged for connection to the other output terminal of the d.c. power source. The transformer has a laminated silicon steel core, and includes a secondary winding arranged for connection across the input terminals of a gaseous discharge lamp. A control circuit is connected to control conduction by the separate controllable switching devices in alternating sequence at a desired frequency of operation.
REFERENCES:
patent: 3653766 (1972-04-01), Walters et al.
patent: 4004187 (1977-01-01), Walker
patent: 4277726 (1981-07-01), Burke
patent: 4356416 (1982-10-01), Weischedel
patent: 4463286 (1984-07-01), Justice
patent: 4498031 (1985-02-01), Stupp et al.
patent: 4535458 (1985-08-01), Inoue et al.
patent: 4553039 (1985-11-01), Stifter
patent: 4553199 (1985-11-01), Harada et al.
Chatmon Saxfield
Cummings Ronald G.
Grimes Edwin T.
Masselle Francis L.
The Perkin-Elmer Corporation
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