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. 02, 1976
Filed:
Apr. 01, 1974
Eiji Umeya, Tokyo, JA;
Hifumi Yanagisawa, Tokyo, JA;
Kabushiki Kaisha Meidensha, Tokyo, JA;
Abstract
A vacuum power circuit breaker having a vacuum-bulb interrupter unit comprising a vacuum bulb consisting of a cylindrical insulating envelope and end plates attached to the axial ends of the insulating envelope, stationary and movable electrode rods projecting into the vacuum bulb through the end plates, and metallic bellows assemblies connecting the stationary and movable electrode rods to the associated end plates of the vacuum bulb. Not only the movable electrode rod but the stationary electrode rod is thus axially movable relative to the vacuum bulb so that an impact applied to the stationary electrode rod when the movable electrode rod is connected to the stationary electrode rod is absorbed by the stationary electrode rod itself. The stationary electrode rod is held fixed independently of the vacuum bulb to prevent the electrode rod from being moved away from the movable electrode rod when the latter is moved and connected to the former. Means are provided for the purpose of preventing relative rotation between the electrode rods and the vacuum bulb so that the bellows assemblies are protected from being distorted when the stationary electrode rod is fixed to a stationary member.