Data retaining apparatus for a camera
AssigneeCanon Kabushiki Kaisha
InventorsShosuke Haraguchi, Yoshihiko Aihara
Life of this patent
Estimating the term…
Abstract
A data retention apparatus which protects against loss of data from the data processing circuits of a camera during replacement of the camera battery. A non-volatile memory, such as an E.sup.2 PROM, is arranged to receive data from the data processing circuits when the camera's battery cover is opened. An operating member holds the camera battery against it s contacts when the cover is opened so that data transfer can take place. Thereafter the operating member can be operated to release the battery.
Claims6
In a camera having data processing circuits, a battery receptacle and a cover for the battery receptacle, a data retention apparatus comprising:
- (a) a switch adapted to be switched from a first condition to a second condition by the operation of opening the cover for the battery receptacle;
- (b) a non-volatile memory circuit connected to said switch to receive data from said data processing circuits in said camera upon the switching of said switch to said second condition;
- and
- (c) an operation member which can be operated after the operation of opening said cover to release a battery from said receptacle, said operation member maintaining the supply of electrical power from said battery to said data processing circuits and to said non-volatile memory circuit until said operation member is operated.
In a camera having data processing circuits, a battery receptacle and a cover for the battery receptacle, a data retention apparatus comprising:
- (a) operation means operable for permitting removal of a battery from said battery receptacle, by a first operation step and a subsequent second operation step;
- (b) a switch adapted to be switched from a first condition to a second condition in response to said first operation step;
- and
- (c) a non-volatile memory circuit arranged to receive data from said data processing circuits upon the switching of said switch to said second condition.
Dependencies are inferred from the claim text.