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. 15, 1985
Filed:
Sep. 29, 1982
Kabushiki Kaisha Meidensha, , JP;
Abstract
An electrical contact structure of a vacuum interrupter wherein a pair of electrical contacts 2 are provided within a vacuum vessel 1 through a pair of contact rods 14 so that one is in contact with the other or away therefrom. The electrical contact 2 comprises a substantially disk-shaped contact body 2b made of high electric conducting metal portions and metallic pipes having a low electric conductivity, and a plurality of major current flowing sections 22 made of metal having a high electric conductivity, penetrated in the contact body 2b in a manner to be penetrated in the direction of the thickness of the contact body 2b and separated from each other. As an alternative form, the electrical contact 2 may comprise a substantially disk-shaped contact body 2b of ceramic pipes 21 having a low electric conductivity and a plurality of penetrating portions (21a, 21d) wherein each portion (21a, 21d) along the inner and outer periphery of which a chromium oxide film 21b, 21c is formed, is filled with copper to form a plurality of major current flowing portions 22. As a further alternative form, the electrical contact 2 may comprise a substantially disk-shaped contact body 2b of ceramic pipes 21 having a low electric conductivity and a plurality of penetrating portions 21a, 21d and a plurality of major current flowing portions 22a formed by filling copper containing a chromium oxide material of about 0.1% to 0.6% by weight.