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. 11, 1980
Filed:
Apr. 06, 1979
Bertram W Baumbach, Arlington Heights, IL (US);
Reliable Electric Company, Franklin Park, IL (US);
Abstract
A line protector for a communications circuit comprises an insulating base having a ground pin and two pairs of line pins, one pair for each side of the line, projecting through the base. Each pair of line pins has a contact electrically connected thereto and projecting away from the base. The ground pin also has a contact projecting away from the base and spaced from the line pin contacts. A metal oxide varistor having opposed faces provides surge voltage protection for each side of the line. The line pin contacts are bonded to one face of the varistor while the ground pin contact is bonded to the other face of the varistor. Electrically conductive spring clips span the varistor and are pressed toward its opposite faces and in electrical contact with the ground pin contact. An insulating sheet is interposed between the clips and the line pin contacts to prevent one or more of the clips from grounding the line except in such surge condition that heats the varistor sufficiently to melt the insulation.