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:
Dec. 20, 1983
Filed:
Feb. 13, 1981
Shinzo Sakuma, Yokohama, JP;
Hifumi Yanagisawa, Sagamihara, JP;
Kazuo Tokuhata, Kanagawa, JP;
Hiroshi Miyagawa, Yokohama, JP;
Kabushiki Kaisha Meidensha, Tokyo, JP;
Abstract
A vacuum power interrupting device comprising a bell-shaped vacuum power interrupter which includes a bell-shaped metallic casing wherein a pair of electrical contact rods are extended for interrupting a large current with a high voltage, and insulating molded block made of a resin for supporting the bell-shaped vacuum power interrupter. According to the present invention, there is provided a single-phase or three-phase vacuum power interrupting device comprising a vacuum power interrupter which includes a bell-shaped metallic casing, a ceramic insulating circular end plate fitted to the opening end of the bell-shaped metallic casing, and a pair of electrical contact rods having electrical contacts partially extended within the casing, being normally in contact with each other or moving away from each other, and an insulating molded block made of a resin into which the outer peripheral surface of the radially extended portion of the bell-shaped metallic casing and insulating circular end plate are integrally burried, whereby the atmospheric creepage distance from a movable electrical contact rod serving as an electrically charged portion is increased so that the atmospheric dielectric strength of the vacuum power interrupter becomes greater and a larger current with higher voltage can be interrupted.