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:
Oct. 03, 1978
Filed:
Dec. 02, 1976
Howard R Shaffer, Westminster, MD (US);
I-T-E Imperial Corporation, Spring House, PA (US);
Abstract
An electric switch mounted within an enclosure having a hinged cover is manually operated from outside the enclosure by a handle mechanism secured to the enclosure. The cover is provided with a single aperture near the edge thereof remote from the cover hinges, with this aperture providing clearance for the U-shaped operating handle of the mechanism when the cover is closed and also providing clearance for a catch which holds the cover closed. The mechanism also includes a defeatable cover interlock to prevent opening of the cover when the switch is closed, and a defeatable switch interlock to prevent closing of the switch when the cover is open. Each interlock comprises a flat member biased to an active position by a U-shaped wire spring, positioned for cooperation with different arms of the operating handle, and mounted for movement in planes perpendicular to the cover when the latter is closed. A formed wire loop pivotally mounted to the housing of the handle mechanism is provided to receive a padlock to lock the cover closed.