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. 27, 1979
Filed:
Mar. 30, 1977
Applicant:
Inventors:
Masami Shimizu, Tokyo, JP;
Junji Omi, Tokyo, JP;
Kunio Watanabe, Kawasaki, JP;
Masanori Uchidoi, Yokohama, JP;
Hiroshi Aizawa, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; H01C / ; H01C / ;
U.S. Cl.
CPC ...
354234 ; 338127 ; 338202 ; 338307 ; 354 / ; 354289 ;
Abstract
The control part of the slide member in contact with electrodes of a variable resistance with resistance members and a plural number of electrodes is made larger than the insulation part between two adjacent electrodes so as to secure the conductivity between the electrodes and the slide member. The form of the slide member and the space provided between each electrode part with respect to other such parts satisfy a predetermined mathematical relationship.