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. 04, 1982
Filed:
Dec. 12, 1980
Applicant:
Inventors:
Kazunobu Urushihara, Inagi, JP;
Masanori Uchidoi, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354289 ; 354 / ;
Abstract
In a voltage indicator of a camera, the voltage value of the battery is converted into digital value through analog-to-digital conversion processing. Such digital signals are digitally expanded by converting equal difference variations thereof into equal ratio variations thereof. The digitally expanded signals are adapted to vary in accordance with variations of the battery voltage. Thus, the expanded digital signals energize an alarm to audibly indicate the value of the battery voltage.