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:
Mar. 06, 1979
Filed:
Dec. 13, 1977
Applicant:
Inventor:
Seiichi Saito, Iruma, JP;
Assignee:
Nihon Beru-Haueru Kabushiki Kaisha (Bell & Howell Japan, Ltd.), Higashimurayama, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ; H02J / ;
U.S. Cl.
CPC ...
352141 ; 354 42 ; 354 43 ; 3546 / ; 307 85 ;
Abstract
Disclosed is a circuit for automatically intermittently sensing adequate ient light conditions and adjusting a cine camera iris for same. The circuit includes an astable multi-vibrator for intermittent switching of power to a Cds cell. Under low light conditions the resistance of the cell becomes great enough to stop the oscillations of the multi-vibrator.