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. 17, 1993
Filed:
Oct. 01, 1991
Allen D Gara, Chicago, IL (US);
Reliance Comm/Tec Corporation, Chicago, IL (US);
Abstract
A protector system is provided for use in a low voltage power feed arrangement including a device requiring a low voltage power feed, and a power source. The power source is capable of supplying the device with electrical power. The device is electrically connected to the power source by means of a power transmission line. A line protector set is electrically connected to the power transmission line between the device and the power source so that all power in the power transmission line must encounter the line protector before the power reaches the device. The line protector set comprises an over-voltage arrester and an over-current arrester. The over-voltage arrester is coupled in circuit for grounding the transmission line in the presence of an over-voltage condition. The over-current arrester comprises a positive temperature coefficient resistor electrically connected in series with the device for preventing over-currents on the transmission line from reaching the device.