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:
Dec. 21, 1982
Filed:
Apr. 07, 1981
Fumiaki Hiraike, Hachioji, JP;
Abstract
An exposure ascertaining device for cameras, in which the exposure of the film is ascertained on the basis of variations in an output from a photoelectric element disposed in a position where said photoelectric element can receive the incident light passed through a film. An exposure ascertaining device for cameras, comprising a photoelectric element disposed in a position which is away an optical path in which such a part of the incident light that enters the surface of a film and which position permits said photoelectric element to receive such a part of the incident light that advances toward a film-surrounding region of a film-set side of the camera. Another photoelectric element disposed in a position which permits the same photoelectric element to receive the light reflected from the film-surrounding region of the film-set side of the camera. The movements of movable members which are adapted to be moved when the film is exposed are ascertained on the basis of outputs from said photoelectric elements.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile