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. 14, 1984
Filed:
May. 10, 1982
Richard C Barthel, Chicago, IL (US);
Richard D Roy, Valparaiso, IN (US);
The Singer Company, Stamford, CT (US);
Abstract
A safety device for use with an electric appliance to prevent the appliance from inadvertently being started if the appliance is plugged into an outlet when the on/off switch of the appliance is in its on state. A low level sensing current is applied to the appliance before full operating power is applied to the appliance. Detection of the low level sensing current prevents application of full operating power. If no sensing current is detected, full power is applied and the detector is disabled.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile