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:
Feb. 14, 1984
Filed:
Oct. 13, 1981
Applicant:
Inventor:
Norman D Staller, Beverly, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354435 ; 354413 ; 35414911 ;
Abstract
A photographic exposure control system of the type embodying scanning shutter blade elements includes a control blade selectively actuatable in accordance with whether the photographic apparatus is utilized in an ambient or artificial scene-lighted mode of operation for controlling which of two separate sets of photocell sweep secondary apertures in the shutter blade elements will direct scene light to a photoresponsive element while at the same time controlling a maximum effective primary aperture to which the shutter blade elements are allowed to progressively increase.