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:
Mar. 20, 1990
Filed:
May. 01, 1989
Applicant:
Inventors:
Helmuth Neuwirth, Garden City, NY (US);
Carl Meyerhoefer, Dix Hills, NY (US);
Assignee:
Porta Systems Corp., Syosset, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H / ; H02H / ;
U.S. Cl.
CPC ...
337 32 ; 361124 ;
Abstract
A fail-safe secondary fuse device for assuring the grounding of a conductive gas tube used in modular protection devices for individual subscriber circuit pairs. The device resiliently engages each of the three end and center electrodes normally provided on the tube. In the case of the end electrodes, the device is insulated from direct electrical communication by a fusible sleeve of insulative material which fuses under heat emanating from the gas tube with the occurrence of continued current overload.