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:
May. 29, 1990
Filed:
Dec. 01, 1988
Applicant:
Inventors:
Nobuyuki Kawai, Gunma, JP;
Mitsuhiro Nakamura, Tokyo, JP;
Assignee:
Toshiba Silicone Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H / ; H01H / ; H01C / ;
U.S. Cl.
CPC ...
200 / ; 200517 ; 200553 ; 200339 ; 338114 ;
Abstract
A push button switch which may be used, for example, as a zooming switch in a video camera, having a uniform electrical resistance/applied pressure characteristic and which can be manufactured easily and at a low cost. The switch includes a conductive layer and a pressure-sensitive resistance element disposed between electrode patterns provided on a printed circuit board and an insulated push button. The conductive layer is coated with a pressure-sensitive conductive paste and the pressure-sensitive resistance element is fixed to the insulated push button at a opposed surface to the electrode patterns separated by a predetermined distance.