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:
Nov. 20, 1979
Filed:
Nov. 09, 1978
Harumi Tanaka, Kobe, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
A camera film metering mechanism includes a driven member coupled to the film takeup spool and having a driven hub, a drive member coupled to a motivating member and including a drive hub end-to-end and coaxial with the driven hub. A helical coupling spring is wound around the hubs and is free and unanchored thereto so that upon rotation of the drive hub in an advance direction, the coil is tightened about hubs to drive couple them and upon rotation of the drive hub in a reverse direction, the hubs are uncoupled. A stop member collar rotatably engages the coil and is connected to the drive member end of the coil and a brake member is advanceable from a spring retracted position into engagement with the stop member in response to the advance of a predetermined length of film to thereby effect the loosening of the coil and the uncoupling between the drive and driven members to stop the film advance.