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:
Feb. 27, 1979
Filed:
Sep. 26, 1977
Paul S Lundsgaard, Chicago, IL (US);
Reliable Electric Company, Franklin Park, IL (US);
Abstract
A surge arrester of the gas tube type for protecting telephone lines has a primary arc gap and a secondary arc gap electrically coupled in parallel. The primary arc gap is wider than the secondary arc gap and both arc gap are exposed to the inert gaseous medium of the arrester. The gas pressure and the width of the gaps are such that the breakdown voltage of the primary arc gap is less than the breakdown voltage of the secondary arc gap so that in normal operation the arrester discharges through the primary arc gap. However, if the inert gas leaks from the tube and becomes replaced with air at atmospheric pressure, the arrester will discharge through the secondary arc gap to provide a backup protection for the line.