Dual light source

Details Dual light source Dual light source

1982-06-09

1984-07-24

Dixon, Harold

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Multiple filament load devices

315 88, 315 93, 250551, 350 96C, 362 12, 362 20, H05B 3910

Patent

active

044619740

ABSTRACT:
A multiple lamp system for use with fiber optic light guide for automatically switching from a main lamp to a standby lamp upon failure of the former. A solenoid is employed with the inductor in the circuit of the main lamp to overcome the bias of the switch in the standby lamp circuit to keep the former open. When the main lamp fails causing interruption of current flow, the switch closes thereby permitting energization of the standby lamp. An indicator is provided to show which lamp is functioning.

REFERENCES:
patent: 2735928 (1956-02-01), Smethurst
patent: 3327162 (1967-06-01), Wright
patent: 3541341 (1970-11-01), Leete
patent: 4048486 (1977-09-01), Kriege
patent: 4399358 (1983-08-01), Burkhardt
"Coupling Light-Sources to Fibers," by Mark L. Dakss, Laser Focus, Dec. 1975, pp. 31-34.
"Speroid Lens at Fiber End" by O. R. Gupta, IBM Tech. Disc. Bull., vol. 24, No. 2, Jul. 1981, pp. 1161, 1162.

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