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. 02, 1997
Filed:
Apr. 16, 1996
Todd Kim Knapp, Waukesha, WI (US);
Cooper Industries, Inc., Houston, TX (US);
Abstract
An electric device, such as a transformer, has a tank and an arrester for protection against high voltage surges, the arrester being grounded to a wall of the tank. A switch is mounted in the tank wall for enabling the ground connection to be disconnected from outside the tank. The switch includes a shaft extending slidably through an opening in the tank wall. A gripping handle is mounted on an outer end of the shaft, and a spring washer is mounted on an inner end of the shaft. The spring washer is electrically connected to a discharge side of the arrester and is movable toward the wall and into electrically conductive relationship therewith in response to sliding of the shaft. By sliding the shaft in a direction moving the washer away from the wall, the electrical connection is broken. The handle is threadedly mounted to the shaft to be reversible between a first position holding the shaft in its switch closed position, and a second position for enabling the shaft to be slid to its switch open position.