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. 14, 1978
Filed:
Apr. 22, 1976
Saburo Numata, Urawa, JA;
Shinichiro Fujino, Urawa, JA;
Fuji Photo Optical Co., Ltd., Omiya, JA;
Abstract
A switch means for electrically operating a device in a photographic camera is composed of a mechanical switch and a semiconductor switching element connected with the mechanical switch. The mechanical switch has a pair of contacts made of resilient conductive material and increases its conductivity as the pressure applied thereto increases. By the increase of the conductivity of the mechanical switch an input voltage supplied to the semiconductor switching element is raised and the switching element is turned on when the input voltage has reached a predetermined level. Thus, chattering and large consumption of electric power are prevented.