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. 01, 1977
Filed:
May. 12, 1976
Paul S Lundsgaard, Chicago, IL (US);
William S Sedlacek, Chicago, IL (US);
Reliable Electric Company, Franklin Park, IL (US);
Abstract
A line protector for communications circuits comprises a gas tube having external contact surfaces for connections to communication lines and to ground. A conductive member is proximate to the contact surfaces that are associated with the communication lines. A dielectric substance interposed between the conductive member and the last-mentioned contact surfaces melts upon overheating of the protector resulting from the excessive line current. The conductive member, due to its resiliency, engages the subjacent contact surface or surfaces thereby resulting in a direct short circuit between the protected line and ground. A shield over at least part of the gas tube in the region of the conductive member prevents potting compound or foreign matter from obstructing the function of the conductive member.