Last-flash indicator switch in photoflash array

Details Last-flash indicator switch in photoflash array Last-flash indicator switch in photoflash array

H - Electricity

05

B

315/16

H05B 41/34 (2006.01) G03B 15/04 (2006.01)

Patent

CA 1111899

ABSTRACT OF THE DISCLOSURE A multiple lamp photoflash array has flash- sequencing circuitry for causing the lamps to flash one at a time in response to firing pulses applied to the array. All lamps except for the last-to-flash lamp provide an open circuit after lamp flashing, and the last-to-flash lamp provides a short circuit or low impedance after flashing to function as a last- flash indicator switch.

285135

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