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. 28, 1987
Filed:
Apr. 09, 1985
Applicant:
Inventor:
Arnold J Alderman, Coon Rapids, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
355 68 ; 355 69 ;
Abstract
An exposure control for an imaging apparatus, the apparatus producing a light image based on an image member presented to the apparatus which is directed to a light responsive member via a partially silvered mirror of the apparatus. The exposure control includes a photocell which receives light transmitted through the mirror via a condensing lens, the photocell being connected to a circuit means which produces a signal having a duration, which varies according to the resistance of the photocell. The signal is used by a portion of the circuit means for controlling the exposure of the light responsive member to the light image.