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:
Sep. 06, 1977
Filed:
Mar. 15, 1976
Applicant:
Inventors:
Walter Bletz, Braunfels, DT;
Werner Holle, Wetzlar, DT;
Assignee:
Ernst Leitz GmbH, Wetzlar, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354 / ; 354 24 ; 354 50 ; 354 53 ; 354 / ; 354 / ;
Abstract
An electronic device for storing and indicating illumination parameters and for controlling the exposure time for photographic cameras having an exposure meter and a timer. The exposure meter includes an analog/digital converter with a digital storage part having a plurality of binary stages. These various stages correspond to different intensities of illumination of an object. The timer includes a combination of binary ratio reducers and logic gates and these are adapted to be selected by the analog/digital converter or by manual adjustment. A generator produces impulses which control the timer.