US Patent No: 5,467,011

Number of patents in Portfolio can not be more than 2000

System for detection of the phase of an electrical signal on an alternating circuit power line

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ATTORNEY / AGENT: (SPONSORED)
 

Importance

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Abstract

A data transmission system for power line carriers includes a transmitter which generates a stable carrier frequency at a bandwidth of less than one hertz. The transmitter is connected to the power line to transmit the generated frequency over the power line to a receiver. The receiver implements filters of a bandwidth of one hertz or less to attenuate any signals that do not correlate with the generated frequency. Information on the phase of the power line to which the transmitter is connected is represented in the form of a generated signal which modulates the stable frequency generated by the transmitter on the power line. The receiver is located on another portion of the power line and compares the phase information from the transmitter with the phase of the power line to which the receiver is connected and displays the resulting comparison for interpretation.

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First Claim

Related Publications

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Patent Owner(s)

Patent OwnerAddressTotal Patents
NATIONAL RURAL ELECTRIC COOPERATIVE ASSN.WASHINGTON, DC1
NATIONAL RURAL ELECTRIC COOPERATIVE ASSOCIATIONWASHINGTON, DC1

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hunt, Paul C Pequot Lakes, MN 11 242

Cited Art

Patent Info (Count) # Cites Year
 
COOPER INDUSTRIES, INC. (2)
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PASAR, INC. (2)
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ABB POWER T&D COMPANY, INC., A DE CORP. (1)
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RADIODETECTION LIMITED OF (1)
4,896,117 Method of and apparatus for tracing faults in electrical conductors 19 1988
 
THE CHARLES MACHINE WORKS, INC. (1)
5,264,795 System transmitting and receiving digital and analog information for use in locating concealed conductors 72 1990
 
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY (1)
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VINEYARD; CLARK (1)
4,241,326 Electronic traffic control and warning system 10 1979
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
4,801,868 Circuit tracing apparatus and method 19 1987

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
MOSAID TECHNOLOGIES INCORPORATED (6)
7,933,297 Network combining wired and non-wired segments 1 2004
7,876,767 Network combining wired and non-wired segments 1 2005
7,978,726 Local area network of serial intelligent cells 1 2006
7,424,031 Local area network of serial intelligent cells 4 2007
7,656,904 Telephone system having multiple distinct sources and accessories therefor 2 2007
7,852,874 Local area network of serial intelligent cells 3 2008
 
LOW ENVIRON AG, LLC (5)
6,055,435 Wireless telephone connection surge suppressor 29 1997
5,970,127 Caller identification system for wireless phone jacks and wireless modem jacks 68 1997
6,107,912 Wireless modem jack 47 1997
6,246,868 Conversion and distribution of incoming wireless telephone signals using the power line 18 1998
6,243,571 Method and system for distribution of wireless signals for increased wireless coverage using power lines 105 1998
 
HUNT TECHNOLOGIES, INC. (3)
6,154,488 Low frequency bilateral communication over distributed power lines 68 1997
6,177,884 Integrated power line metering and communication method and apparatus 50 1998
7,791,468 Power line communication system having time server 0 2007
 
GRID2020, INC. (2)
6,549,120 Device for sending and receiving data through power distribution transformers 54 2000
8,159,210 System for automatically detecting power system configuration 0 2009
 
ANRITSU COMPANY (1)
6,943,563 Probe tone S-parameter measurements 56 2002
 
EDM INTERNATIONAL INC. (1)
6,642,700 System, method, field unit, reference unit and computer program product for phase tracking of electrical conductors 16 2002
 
GENERAL ELECTRIC COMPANY (1)
8,143,879 Meter phase identification 0 2008
 
GEOMETRICS GROUP, INC. (1)
6,541,976 Under and above ground, radio frequency driven element, metal locating system 0 2000
 
INTEL CORPORATION (1)
6,249,213 Method for transmitting information over an alternating current power line through a plurality of frequency orthogonal subchannels 23 1998
 
IPROBE AB (1)
6,982,650 Method, system and apparatus for remote measuring of electrical power 3 2000
 
SILVER SPRING NETWORKS, INC. (1)
8,207,726 Determining electric grid endpoint phase connectivity 1 2009
 
THOMSON INC. (1)
5,818,821 Universal lan power line carrier repeater system and method 113 1996
 
VORTANT TECHNOLOGIES, LLC (1)
6,972,690 System and method for transmission of electrical signals in imperfectly-conducting media 3 2001
 
ZIRCON CORPORATION (1)
6,933,712 Electrical circuit tracing and identifying apparatus and method 7 2002
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (2)
5,796,253 Time-domain electromagnetic geophysical mapping instruments 7 1996
7,031,859 Apparatus and method for identifying cable phase in a three-phase power distribution network 3 2003