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, 1982
Filed:
Nov. 18, 1980
Hansjurgen Hartung, Wolfenbuttel, DE;
Rollei-Werke Franke & Heidecke GmbH & Co. KG, Brunswick, DE;
Abstract
Disclosed is a coupling for the connection of a drive motor to a still camera to facilitate automated cocking and actuation of the camera. The coupling has two major portions one of which rotates with a drive motor and the other of which rotates with the film transport advance drum. One of the portions will be a cam and the other portion a cam biassing device such that under low torque loads being transmitted from the drive motor to the film transport advance drum, the two portions rotate together. When the film has been wound, the film transport advance drum stops suddenly increasing the torque transmitted between the still moving motor and the transport advance drum. When the torque reaches a preset maximum amount, the cam biassing device slips relative to the cam and actually drives itself in a reverse direction. An additional apparatus is provided which free-wheels in the normal direction and couples movement in a reverse direction to a shutter release mechanism which insures that the picture is taken while the film transport advance drum is motionless. Specific embodiments showing the motor powering either the cam or the cam biassing device are disclosed.