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US 4,952,967 AGranted
Timer-assisted photographing mode control device for camera
AssigneeCanon Kabushiki Kaisha
InventorsJiro Kazumi, Shinichi Tsujimoto, Masaaki Ishihara
Life of this patent
Estimating the term…
Abstract
A timer-assisted photographing mode control device for use in a camera of the type which has a timer circuit capable of delivering, at a predetermined time interval, signals relating to starting of a shutter releasing operation. When timer-assisted photographing operation is to be executed, a photographing mode suitable for the timer-assisted exposure is forcibly selected.
Claims24
A timer-assisted photographing mode control device for a camera, comprising:
- (a) timer circuit means capable of automatically delivering a signal relating to starting of a plurality of exposure operations to effect at least one photographing operation during a predetermined time interval;
- (b) camera control circuit means having a plurality of operation modes relating to photographing;
- and
- (c) change-over circuit means for forcibly selecting a predetermined mode from said plurality of operation modes of said camera control circuit means when a timer-assisted photographing operation is to be conducted.
1 more element
A timer-assisted photographing mode control device for a camera, comprising:
- (a) timer circuit means capable of automatically delivering signals relating to starting of a plurality of exposure operations to effect at least one photographing operation during a predetermined time interval;
- (b) camera control circuit means having a first operation mode which allows the exposure operation to be executed only when the optical system of said camera is in an in-focus state, and a second operation mode in which it allows the exposure operation to be executed regardless of the state of focusing of said optical system;
- and
- (c) change-over circuit means for forcibly selecting the second operation mode from said plurality of operation modes of said camera control circuit means when a timer-assisted photographing operation is to be conducted.
1 more element
A timer-assisted photographing mode control device for a camera, comprising:
- (a) timer circuit means capable of automatically delivering signals relating to starting of a plurality of exposure operations to effect at least one photographing operation during a predetermined time interval;
- (b) camera control circuit means having a single-shot mode in which an exposure operation and a subsequent exposure preparation operation are executed in response to exposure start signal which is produced in response to an exposure operation, and a continuous-shooting mode in which the exposure operation and the exposure preparation operation are alternately repeated over a period in which the exposure start signal is continuously maintained;
- and
- (c) change-over circuit means for forcibly selecting the continuous-shooting mode when a timer-assisted photographing operation is to be conducted.
1 more element
A camera having a timer-assisted photographing mode control device, comprising:
- (a) timer circuit means capable of automatically delivering signals relating to starting of a plurality of exposure operations to effect at least one photographing operation during a predetermined time interval;
- (b) camera control circuit means having a plurality of operation modes relating to photographing;
- and
- (c) change-over circuit means for forcibly selecting a predetermined mode from said plurality of operation modes of said camera control circuit means when a timer-assisted photographing operation is to be conducted.
1 more element
A camera having a timer-assisted photographing mode control device, comprising:
- (a) timer circuit means capable of automatically delivering signals relating to starting of a plurality of exposure operations to effect at least one photographing operation during a predetermined time interval;
- (b) camera control circuit means having a first operation mode which allows the exposure operation to be executed only when the optical system of said camera is in an in-focus state, and a second operation mode in which it allows the exposure operation to be executed regardless of the state of focusing of said optical system;
- and
- (c) change-over circuit means for forcibly selecting the second operation mode from said plurality of operation modes of said camera control circuit means when a timer-assisted photographing operation is to be conducted.
1 more element
A camera having a timer-assisted photographing mode control device, comprising:
- (a) timer circuit means capable of automatically delivering signals relating to starting of a plurality of exposure operations to effect at least one photographing operation during a predetermined time interval;
- (b) camera control circuit means having a single-shot mode in which an exposure operation and a subsequent exposure preparation operation are executed in response to exposure start signal which is produced in response to an exposure operation, and a continuous-shooting mode in which the exposure operation and the exposure preparation operation are alternately repeated over a period in which the exposure start signal is continuously maintained;
- and
- (c) change-over circuit means for forcibly selecting the continuous-shooting mode when a timer-assisted photographing operation is to be conducted.
1 more element
Dependencies are inferred from the claim text.