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:
Jun. 18, 1996
Filed:
Sep. 26, 1994
Hiroshi Terunuma, Yachiyo, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A battery check device, suitable for use in a camera, for reliably checking the essential capacity of a battery power source without affecting the voltage recovery of the battery power source after a long period of non-use. The battery check device monitors a starting switch, for example, a main switch or a release button, with a timer circuit and compares a switch interval between a previous time the starting switch was set ON and a present time the starting switch is set ON with a predetermined time. When the switch interval is within the predetermined time, a battery check circuit checks the power supply capacity of the battery power source using a light load circuit. When the interval is not within the predetermined time, the battery check circuit checks the power supply capacity of the battery using a heavy load circuit.