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:
Dec. 30, 1986
Filed:
Feb. 04, 1981
Hiroshi Iwata, Nara, JP;
Katsuji Ishikawa, Osaka, JP;
West Electric Co., Ltd., Osaka, JP;
Abstract
An automatic film winding system comprising in combination, a mechanical film winding or transport system including an electric motor and an optical film-advance sensing system comprising a light source and a light sensor for sensing the length of the film advanced in terms of one or more perforations of the film passed past a predetermined point. In response to the depression of a shutter button, a power supply is automatically connected to the light sensor and then to the electric motor and the light source when one exposure operation has been completed so that the film is advanced or wound. When a predetermined number of perforations has passed past the predetermined point and sensed by the optical sensing system; that is, after the film has been advanced by a predetermined length, the power supply is disconnected from the light sensor, the electric motor and the light source.