Electric lamp and discharge devices: systems – Condenser in the supply circuit – Condenser in shunt to the load device and the supply
Patent
1975-08-22
1979-08-14
Dahl, Lawrence J.
Electric lamp and discharge devices: systems
Condenser in the supply circuit
Condenser in shunt to the load device and the supply
315151, 340380, 354 60F, H05B 3700
Patent
active
041646860
ABSTRACT:
A device for controlling the termination of light emission by a flash device 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: 3033988 (1962-05-01), Edgerton
patent: 3213344 (1965-10-01), Jensen
patent: 3340426 (1967-09-01), Elliott
patent: 3350604 (1967-10-01), Erickson
patent: 3438766 (1969-04-01), Biber
patent: 3509422 (1970-04-01), Kilgore
patent: 3532035 (1970-10-01), Fujii
patent: 3626827 (1971-12-01), Yanagi
Orban Jean
Vital Zoltan
Dahl Lawrence J.
Ponder & Best Inc.
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