Memory locking means of an exposure control circuit for a camera

Details Memory locking means of an exposure control circuit for a camera Memory locking means of an exposure control circuit for a camera

1979-08-30

1980-11-11

Gellner, Michael L.

G03B 7089

Patent

active

042329558

ABSTRACT:
In a photographic camera provided with an exposure control circuit including a light measuring circuit which measures scene brightness and a memory circuit which memorizes the output of the light measuring circuit, a switching circuit is connected between the light measuring circuit and the memory circuit. The switching circuit is connected with a time constant circuit so that the switching circuit may be turned off to lock the memory memorized in the memory circuit when the time determined by the time constant circuit has lapsed since the power source is turned on. In a preferred embodiment, the time constant circuit is further connected with the output of the light measuring circuit so that the time determined by the time constant circuit is varied in accordance with the scene brightness.

REFERENCES:
patent: 3324779 (1967-06-01), Noleusawa et al.
patent: 3657979 (1972-04-01), Noleusawa
patent: 3914776 (1975-10-01), Tsujimoto et al.
patent: 3969735 (1976-07-01), Noleusawa

Affiliated with

Also associated with

Rating

Memory locking means of an exposure control circuit for a camera does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Memory locking means of an exposure control circuit for a camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Memory locking means of an exposure control circuit for a camera will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1688299