SEQUENCING CIRCUIT FOR FIRING PHOTOFLASH LAMPS IN PREDETERMINED ORDER

SEQUENCING CIRCUIT FOR FIRING PHOTOFLASH LAMPS IN PREDETERMINED ORDER

A plurality of resistors are successively connected between the junctions of a plurality of series-connected photoflash lamps and semiconductor switch devices of a sequential flashing circuit. The resistors function to provide leakage current paths for the semiconductor switch devices to insure the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: WATROUS, DONALD L
Format: Patent
Sprache:eng
Schlagworte:
AMMUNITION
BLASTING
COMBUSTION APPARATUS
COMBUSTION PROCESSES
EXTINGUISHING-DEVICES
HEATING
IGNITION
LIGHTING
MECHANICAL ENGINEERING
WEAPONS
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Beschreibung
Zusammenfassung:A plurality of resistors are successively connected between the junctions of a plurality of series-connected photoflash lamps and semiconductor switch devices of a sequential flashing circuit. The resistors function to provide leakage current paths for the semiconductor switch devices to insure the flashing of the lamps in a desired predetermined order even though one or more of the lamp circuits may be open-circuited.