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:
Feb. 25, 1986
Filed:
Jan. 09, 1984
Applicant:
Inventor:
Akira Inoue, Hachioji, JP;
Assignee:
Olympus Optical, Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ; G03B / ;
U.S. Cl.
CPC ...
35417311 ; 354214 ;
Abstract
A film end detector produces a film end signal as being a film end when a timer which initiates a timing operation in synchronism with initiation of a power supply to a film winding motor is not reset within a given detection period and is capable of changing the detection period in accordance with a camera condition. The detection period can be changed in accordance with a power voltage, a temperature, a simultaneous charging to an electronic flash unit or the like. This makes it possible to properly detect the film end in accordance with a camera condition and to effectively prevent an error in the detection of the film end.