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. 28, 1982
Filed:
Nov. 05, 1979
Donald W Crouch, Newtown Square, PA (US);
General Electric Company, Philadelphia, PA (US);
Abstract
This method assures that when a vacuum interrupter having its interior at atmospheric pressure is tested by a high potential applied across its contacts, a spark-over will occur internally of the interrupter even though the high potential used has a lower effective value than the minimum needed to consistently produce a spark-over between the fully-separated contacts of the interrupter when the interrupter is at atmospheric pressure. Spaced metallic parts are provided within the interrupter, and these parts are of a metal characterized by higher dielectric strength in a vacuum than the metal used for the opposing regions of the contacts. The minimum gap between the spaced metallic parts is made shorter than the gap between the fully-separated contacts of the interrupter but yet is sufficiently long so that under normal vacuum conditions, it is less susceptible to spark-over than the gap between the fully-separated contacts.