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. 29, 1983
Filed:
Feb. 26, 1981
Applicant:
Inventors:
Assignee:
Koike Seiki Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05D / ;
U.S. Cl.
CPC ...
350269 ; 354 44 ;
Abstract
An automatic control device for controlling the iris diaphragm in an optical system having lens groups therein, comprising an outer casing adapted to be detachably secured to the optical system surrounding the optical system and an iris diaphragm drive mechanism mounted in the outer casing. The iris drive mechanism includes a drive source in the form of an annular rotary electric motor provided by an annular rotor and an annular stator opposing the annular rotor, said rotor and stator being disposed in the optical axis of the optical system. The electric motor responses to a signal from photometer means of the optical system and rotates the rotor to thereby operate the iris diaphragm.