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

1982-07-26

1984-04-24

Adams, Russell E.

35412711, 354415, G03B 716

Patent

active

RE0315672

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: 2953675 (1960-09-01), Kluge et al.
patent: 3638543 (1972-02-01), Kondo
patent: 3651372 (1972-03-01), Uchida et al.
patent: 3706911 (1972-12-01), Wilwerding
patent: 3814985 (1974-06-01), Pecher et al.
patent: 3917395 (1975-11-01), Ogawa

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