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:
Apr. 06, 1976
Filed:
Feb. 18, 1975
Shigeyoshi Odagiri, Machida, JA;
Michio Nuka, Tokyo, JA;
Norikatsu Shinba, Machida, JA;
Mikito Baba, Machida, JA;
Yoshikatsu Iizuka, Tama, JA;
Mitsumi Electric Co., Ltd., Chofu, JA;
Abstract
A miniature variable capacitor comprises a stator plate group having a plurality of stator plates stationarily held in mutually spaced-apart state with specific spacing therebetween by spacers interposed between mutually adjacent plates, a rotor plate group having a plurality of rotor plates held integrally and rotatably in mutually spaced-apart state with specific spacing therebetween by spacers interposed between mutually adjacent rotor plates, and a thin film of a dielectric material is formed simultaneously and integrally on the entire exposed surface of all plates and spacers of at least one of the stator plate group and the rotor plate group. Furthermore, one or more elastic spacers are provided at plate supporting parts of at least one of the stator and rotor plate groups, and fine powder is distributed over the surfaces of all plates. At the time of production of the variable capacitor the dielectric material is formed in a thin film state on the entire plate group.