Electric lamp and discharge devices – With magnetic device – Field transverse to discharge
Patent
1973-08-17
1976-11-16
Corcoran, Robert J.
Electric lamp and discharge devices
With magnetic device
Field transverse to discharge
313201, 313234, 313306, A47B 5300
Patent
active
039926435
ABSTRACT:
A device for controlling the termination of light emission by a flash including means for detecting the light reflected from the subject being illuminated by the flash, integrating means connected to the detecting means for providing a flash termination signal when the total amount of light received by the detecting means reaches a predetermined value, and flash termination means connected to the integrating device and to the flash device for terminating the delivery of electrical energy to the flash device when the signal from the integrating device reaches its predetermined value. The flash termination device is preferably constituted by a novel gas-filled, arc-producing element having identical, unpolarized electrodes and an internal or external triggering electrode.
REFERENCES:
patent: 2290526 (1942-07-01), Berkey et al.
patent: 2919369 (1959-12-01), Edgerton
patent: 3229146 (1966-01-01), Linkroum
patent: 3390296 (1968-06-01), Smith
Orban Jean
Vital Zoltan
Corcoran Robert J.
Dahl Lawrence J.
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