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. 26, 1991
Filed:
Sep. 12, 1989
Kohichi Yamaguchi, Hachioji, JP;
Konica Corporation, Tokyo, JP;
Abstract
A film feeding control device for a camera in which film perforations are arranged so as to pass through a detecting section of a photointerrupter during film feeding, which detects the presence of perforations by comparing an output signal from the photointerrupter when the perforations pass through the detecting section with a predetermined threshold limit value and which detects film feeding conditions according to the variation of the output signal, characterized in that the device includes: (i) calculating means for calculating an average value from maximum and minimum values of the output signal from the photointerrupter; (ii) judging means for establishing the average value as the threshold limit value and for discriminating the film feeding condition by comparing the output signal from the photointerrupter with the threshold limit value; and (iii) controlling means for controlling the feed of film according to the judged result by the judging means.