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:
Feb. 01, 1977
Filed:
Mar. 17, 1975
William Frederick Robotham, St. Charles, IL (US);
Larry D Annis, Elgin, IL (US);
McGraw-Edison Company, Elgin, IL (US);
Abstract
This invention teaches an on/off switch design that can be used in electric power tools, where the power is normally off and further cannot be shifted on unless a switch actuating element is first manipulated through two right angle motions according to a predetermined sequence. The subject device has a normally off on/off switch and a switch actuating element that is supported to move against the switch to shift the same on. The actuating element carries a latch that normally holds it in the switch off position. The latch must first be moved laterally against the force of a biasing spring and held there to release the actuating element, and only then can the actuating element be moved at right angle to the latch releasing movement and then depressed, effective to switch the on/off switch on.