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:
Jan. 20, 1981
Filed:
Dec. 15, 1978
Jean-Pierre Beauviala, Grenoble, FR;
Jean-Pierre Charras, Bas Bernin, FR;
Societe AATON, Grenoble, FR;
Abstract
A moving picture camera with interchangeable film magazine comprises in each magazine, a take-up roll on which is wound the exposed film, and an electric motor rotating this roll. A measuring device is provided for measuring the speed of rotation of the take-up roll and for delivering a first signal representing this speed of rotation. A computer circuit receiving at its inputs said signal and a signal representing the image cadence selected and another signal representing the desired tension for the film, delivers at its ouptut a signal representing the value of the intensity of the electric current supplied to the motor, so that the required mechanical power, in other words the useful electric power supplied by this motor, is constant, for a selected image cadence and a desired film tension.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile