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:
Jan. 08, 1975
Charles W Tragesser, Murrysville, PA (US);
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Abstract
An oil-type circuit-breaker has an improved grid structure for effecting quick extinction of the arc, which is established and lengthened within the grid structure by the separation of the rod-shaped movable contact downwardly away from the stationary-contact structure. The grid structure is constructed by providing a plurality of suitably-configured plate elements, constituting vent passages and oil pockets, within an outer cylindrical shell member. The stationary contact assembly is so arranged as to have a lengthened finger, which serves as an arcing horn, disposed adjacent the side lateral vent openings. The vent openings are formed by passages provided in the individual suitably-configured plate elements; and a splitter plate is interposed between the lateral vent passages and close to the path of movement of the movable contact rod. Additional lower-disposed oil pockets and a lower plug member having an entrance opening, assist in guiding the upward movement of the movable contact rod, and additionally provide considerable turbulence within the oil-grid structure during the opening operation.