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:
Apr. 20, 1976
Filed:
Dec. 05, 1974
Fuji Photo Optical Co., Ltd., Omiya, JA;
Abstract
A rotary shutter of a motion picture camera comprises a pair of fan-shaped sectors which are capable of changing the angle of opening formed thereby. The sector shaft is rotated through a gear train by a claw driving shaft which in turn is rotated by a driving motor. The gear train comprises a pair of gear train means either of which is selectively used to transmit the rotation of the claw driving shaft to the sector shaft. The ratio of the rate of revolution of one shaft to that of the other is changed by changing the gear train means. A switchover means is provided to switchover the gear train from one to the other. The switchover means is associated with means for changing the angle of opening formed by the sectors. In the mode of the prolonged time exposure, the speed of revolution of the sector is reduced to the half of that of the sector in the mode of the normal motion picture. The claw is caused to be out of engagement with the perforation of the film during every other reciprocal movement of the claw so that the film will remain stationary during every other reciprocal movement of the claw to effect a prolonged exposure time.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile