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:
Oct. 13, 1992
Filed:
Jan. 15, 1991
Applicant:
Inventors:
Takayoshi Tsuzuki, Aichi, JP;
Ryohei Yabuno, Aichi, JP;
Hiroshi Motoyama, Aichi, JP;
Hidenori Abou, Aichi, JP;
Assignee:
Aisin Seiki Kabushiki Kaisha, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01C / ;
U.S. Cl.
CPC ...
338172 ; 338170 ; 338173 ; 338178 ;
Abstract
A variable resistor with a switching function includes arcuate resistive layers and arcuate electrodes arranged alternately on a base plate. A protective layer is formed on the base plate adjacent to a first electrode and between the arcuate resistive layers. A gap separates the protective layer from the first electrode in order to electrically isolate the protective layer. A movable portion has brushes fixed thereto which slidably contact the resistive layers, the electrodes, and the protective layer. The protective layer serves as a lubricating layer to reduce the wear on the brush.