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:
Aug. 09, 1983
Filed:
May. 26, 1981
Tomio Fukushima, Higashimine, JP;
Shuzo Tanigaki, Tokyo, JP;
Kabushiki Kaisha Meidensha, Tokyo, JP;
Abstract
A pressure monitoring system for a high-voltage vacuum circuit interrupter including a plurality of capacitors connected in series located outside an evacuated housing and between two metallic end plates each attached to the electrode holder and an arc shielding member. The pressure monitoring system which monitors the deterioration of vacuum pressure within the evacuated housing of the interrupter by detecting the change in the electric field intensity of the capacitors dependent upon the change in vacuum pressure comprises a light source, at least one electric field detecting member having a Pockel's cell located on one of the capacitors, light receiving member and a vacuum pressure determining member, whereby an automatic monitoring of vacuum pressure within the evacuated housing of the vacuum circuit interrupter or within each of the evacuated envelopes of a plurality of vacuum circuit interrupters can be made.