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:
Aug. 15, 1978
Filed:
Mar. 09, 1977
David M Evans, Palatine, IL (US);
S & C Electric Company, Chicago, IL (US);
Abstract
Disclosed is a switch suitable for use in power systems. The switch is of the vertical break type, having two stationary support insulators and one reciprocatory, insulative push rod, wherein movement of a switch blade takes place in a plane which also includes the insulators and the push rod. The two insulators are mounted on a base, one insulator supporting a switch blade hinge assembly, and the other insulator supporting a contact assembly for the switch blade. A novel linkage mounted to the hinge assembly connects the blade to the push rod and permits at least 90.degree. of movement of the blade without adversely affecting dielectric clearances between the push rod and the insulators. The insulators remain stationary when the switch operates, only the push rod and the novel linkage moving to provide motive force to the blade. The push rod may be reciprocated by interconnection to a rotatable shaft via a lever. The shaft may be connected to an operating pipe reciprocated by a remote operator to rotation therewith. After the switch is open, the novel linkage permits the push rod and the lever to form an over-center toggle which, together with the more than 90.degree. opening of the blade, prevents the blade from inadvertently moving toward engagement with the stationary contact as a result of external forces such as wind, etc. The switch and the linkage are usable in single pole and polyphase switches in a variety of configurations.