Automatic control indication device in an automatic control type

Details Automatic control indication device in an automatic control type Automatic control indication device in an automatic control type

1975-07-14

1976-12-21

Adams, Jr., Russell E.

354 35, 354 60F, 354 60L, 354127, 354128, G03B 716

Patent

active

039991938

ABSTRACT:
In an automatic control type electronic flash unit having a light-sensing element for sensing reflection of light generated by an interior light discharge tube with the aid of charging current of a capacitor, light emission of the interior light discharge tube is automatically disconnected when the light-sensing element has sensed a predetermined quantity of light. The electronic flash unit includes means for indicating that light has been automatically controlled, first signal generating means for generating a first signal when the light-sensing element has sensed a predetermined quantity of light, and means for receiving the signal as input and for rendering the indicating means operative upon reception of the signal.

REFERENCES:
patent: 3638543 (1972-02-01), Kondo
patent: 3651372 (1972-03-01), Uchida et al.
patent: 3917395 (1975-11-01), Ogawa

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