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:
Sep. 06, 1983
Filed:
Jan. 19, 1981
John F Perkins, Churchill Borough, PA (US);
Norman Davies, Levelgreen, PA (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
A vacuum circuit interrupter as taught which utilizes the vapor deposition shields thereof in the existing high voltage source or network which is controlled by the circuit interrupter to produce a cold cathode ion detector for determining the quality or amount of vacuum within the vacuum circuit interrupter. The central shield support ring which protrudes through the insulating casing of the circuit interrupter is used to supply ion current to a current detecting bridge through a circumferentially insulated surge resistor and from there to the common terminal of the aforementioned voltage source to thereby return one of the plates of the ion detecting device to the voltage source.