Proper light emission indicating device for computer flash devic

Details Proper light emission indicating device for computer flash devic Proper light emission indicating device for computer flash devic

1980-08-27

1983-07-26

Perkey, William B.

Electric lamp and discharge devices: systems

With signal, indicator, or alarm

Radiant energy responsive control type

315136, 315151, 315241P, H05B 4132, G01J 116

Patent

active

043956580

ABSTRACT:
In the disclosed device, a sensor produces a corroborating signal when a computer flash unit emits a flash proper for an exposure. A timer energizes an indicator for a predetermined time in response to the corroborating signal. When the sensor produces a subsequent corroborating signal in response to another flash, while the indicator is energized, a reset device resets the timer. According to one embodiment of the invention, an overriding arrangement connected to the timer nullifies the operation of the timer a predetermined time after a flash emission.

REFERENCES:
patent: 3979639 (1976-09-01), Adams, Jr.

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