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:
Jun. 25, 1991
Filed:
Feb. 12, 1990
Applicant:
Inventors:
Helmuth Neuwirth, Garden City, NY (US);
Carl H Meyerhoefer, Dix Hills, NY (US);
William V Carney, Oyster Bay, NY (US);
Assignee:
Porta Systems Corp., Syosset, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H / ; H02H / ;
U.S. Cl.
CPC ...
337 32 ; 361124 ; 361129 ;
Abstract
A gas tube fail safe device for use in individual subscriber circuit telephone mmodules and related equipment, in which a fusible element is adapted to by-pass the conductive function of the gas tube in the event of gas tube failure. In one embodiment the construction provides for the fusing of the fusible element upon the occurrence of a sustained current overload. In another embodiment, this operation is supplemented by provision of secondary air gap means operative upon the occurrence of momentary excess voltage surges in the presence of a defective gas tube.