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:
Sep. 09, 2008
Filed:
Nov. 28, 2005
Connie H. Barnes, Midland, VA (US);
John K. Boland, Ii, Dover, DE (US);
Hossein Eslambolchi, Los Altos Hills, CA (US);
John Sinclair Huffman, Conyers, GA (US);
Linard H. Miller, Leesburg, VA (US);
Randall G. Scholz, Sterling, VA (US);
Connie H. Barnes, Midland, VA (US);
John K. Boland, II, Dover, DE (US);
Hossein Eslambolchi, Los Altos Hills, CA (US);
John Sinclair Huffman, Conyers, GA (US);
Linard H. Miller, Leesburg, VA (US);
Randall G. Scholz, Sterling, VA (US);
AT&T Corp., New York, NY (US);
Abstract
The present invention is a technique for locating and identifying a failed filter/arrester in an underground conveyance such as a fiber optic cable. A sensor is installed in the filter/arrester housing to sense grounding of a cable locating frequency. The sensor will monitor the cable locating signal that is normally on the cable and blocked by the filter arrester to ground. A small radio frequency oscillator (85 to 88 Hz), also installed inside the filter housing, is activated by the sensor. The RF signal is detected above ground with standard cable locating equipment. A warning indicator such as an indicator light may also be installed on the outside of the filter housing. The indicator is also activated by the sensor. In that way, the particular failed filter can be identified if multiple filters are installed at that location. The power that will be required to operate the RF transmitter and indicator will be obtained from the voltage passing through the cable.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile