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. 09, 1976
Filed:
May. 14, 1974
Russell E Frink, Pittsburgh, PA (US);
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Abstract
An improved motion-multiplying linkage-mechanism is provided for the movable contact structure of a circuit-interrupter, particularly one of the sealed-casing type, enclosing a suitable arc-extinguishing medium, such as a highly efficient arc-extinguishing gas, such as compressed sulfur-hexafluoride (SF.sub.6) gas, for example. However, where desired, the motion-multiplying mechanism of the present invention may, additionally, be utilized in vacuum interrupters, or in other types of arc-extinguishing devices where the surrounding casing structure is of a sealed type. In accordance with the present invention, a sylphon bellows is secured to an end metallic plate of the sealed casing, and also affixed to the contact operating rod extending therewithin. A motion-multiplying mechanism, such as a lazy-tong, or pantograph-linkage assembly, is attached to the interior end of the contact operating rod, so that for a short initiating driving travel of the contact operating rod from a suitable mechanism, provided externally of the sealed-casing structure, a considerably increased length of travel for the movable contact structure is obtained. Suitable guideways are preferably provided for guiding the linear travel of the lazy-tong linkage structure so as to effect an accurate linear driving motion of the linkage.