The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 08, 1990
Filed:
Sep. 13, 1989
Yoshihiko Aihara, Yokohama, JP;
Mutsuhide Matsuda, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A power supply device in a camera system having an accessory arranged to be mountable and dismountable on and from a camera body which includes a power source. The camera body includes an electronic circuit arranged to communicate with the accessory by a first connection terminal arranged to permit a first power supply to the accessory, a second connection terminal arranged to permit a second power supply to the accessory, a third connection terminal arranged to permit communication with the accessory, and a detector for detecting mounting of the accessory on the camera body. The accessory includes a motor drive for the camera; an electronic circuit arranged to communicate with the camera body; a first connection terminal arranged to be connected to the first connection terminal on the camera body side to connect the first power supply to the electronic circuit of the accessory; and a second connection terminal arranged to be connected to the second connection terminal of the camera body to connect the second power supply to the motor. The first and second connection terminals are set in positions which correspond to the positions of the first and second connection terminals of the camera body and deviate from each other almost perpendicularly with respect to a direction in which the accessory is to be moved in mounting it on the camera body.