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. 13, 1977
Filed:
Sep. 10, 1976
Applicant:
Inventor:
Kenneth Arnold Pickar, Kanata, CA;
Assignee:
Northern Telecom Limited, Montreal, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 22 ; 179 / ; 357 20 ; 357 51 ;
Abstract
A solid state disconnect or isolating device for disconnecting a subscriber on his premises, replaces a relay with associated circuitry and items. It can be coupled with a surge protection device to provide disconnect signalling, plus loop testing if desired. The device comprises a normally 'on' junction field effect transistor which acts as a pinch resistor.