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. 13, 1995
Filed:
Jan. 26, 1994
Bjarne Frederiksen, Lombard, IL (US);
Mohammad Masghati, Addison, IL (US);
Illinois Tool Works Inc., Glenview, IL (US);
Abstract
An improved fail-safe mechanism is provided for use with a sidactor for protecting telecommunication equipment against high voltage surges. A sidactor includes first and second end terminal pins and a central terminal pin. The fail-safe mechanism consists of a torsional type spring and a pair of insulators. The torsional spring includes a single looped portion and a pair of spring arms extending radially outwardly from the opposite sides of the looped portion. The spring arms of the torsional spring are initially formed so as to have an obtuse angle therebetween. The center of the single looped portion is disposed off-centered in relationship to the centers of the first and second end terminal pins of the sidactor during assembly in order to assure that sufficient and constant pressure is applied between the spring arms and the end terminal pins.