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:
Nov. 10, 1998
Filed:
Apr. 22, 1996
Roy Clarke, Unsworth, GB;
Carl Christopher Ennis, Middleton, GB;
John Stanley Stewart, Wilmslow, GB;
GEC Alsthom Limited, , GB;
Abstract
A vacuum recloser in which an isolator switch is incorporated in series with the vacuum interrupter and is driven by the same actuator. The isolator must only be operated when the vacuum switch is open and no arc current remains. This is ensured in one of two ways (a) by providing a significant lost motion in the isolator drive, giving, say, 20 milliseconds between opening of the vacuum contacts and opening of the isolator contacts, and (b) by latching the isolator drive against opening, compressing a spring against the latch by the actuator attempting to open the isolator, and tripping the latch by a solenoid responsive to lock-out conditions.