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:
Jul. 25, 1989
Filed:
Jun. 22, 1988
Robert W Foster, Jr, Hinsdale, IL (US);
Associated Mills Inc., Chicago, IL (US);
Abstract
A fail-safe immersion detector has a reset button which may be operated to return an appliance to operation after an immersion-caused short circuit has disappeared. However, if the short circuit remains, an operation of the reset button has no effect. Therefore, the user cannot defeat the fail-safe detector by the expedient of taping or otherwise holding down the reset button. A rocker switch enables a testing of the immersion detector, to be conducted to either side of the A.C. power line while preventing a short circuit across the line if an effort is made to simultaneously conduct tests to both sides of the line. Two test wires extend from the detector through the power cord to the appliance, where they are joined. The immersion detector operates via one of the two wires. The rocker switch conducts the test via the two test wires in series. Therefore, the rocker switch controlled test verifies the integrity of the one test wire.