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:
Jan. 20, 1987
Filed:
Jan. 08, 1985
Colin A MacPhee, Scarborough, CA;
Ohjhong Yoon, Markham, CA;
Federal Pioneer Limited, Toronto, CA;
Abstract
An apparatus for detecting a ground fault in an ungrounded DC power supply system having a DC power supply connected by positive and negative lines to a load, an AC voltage is selectively applied between a positive line and ground or between a negative line and ground. A current sensor including an electrical coil surrounding the positive and negative lines is responsive to significant alternating current in one of the lines, when the AC voltage is applied to the line and the line has a ground fault, to thereby indicate the fault.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile