GB1056768A - Improvements in or relating to electric conductor identification apparatus - Google Patents

Improvements in or relating to electric conductor identification apparatus

Info

Publication number
GB1056768A
GB1056768A GB3760263A GB3760263A GB1056768A GB 1056768 A GB1056768 A GB 1056768A GB 3760263 A GB3760263 A GB 3760263A GB 3760263 A GB3760263 A GB 3760263A GB 1056768 A GB1056768 A GB 1056768A
Authority
GB
United Kingdom
Prior art keywords
coils
horizontal
separately
signals induced
attenuators
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3760263A
Inventor
Derek Clifford Murch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
London Electricity Board
Original Assignee
London Electricity Board
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by London Electricity Board filed Critical London Electricity Board
Priority to GB3760263A priority Critical patent/GB1056768A/en
Publication of GB1056768A publication Critical patent/GB1056768A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/02—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current
    • G01V3/06—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current using ac

Abstract

1,056,768. Locating underground conductors. LONDON ELECTRICITY BOARD and D. C. MURCH. Sept. 16, 1964 [Sept.24, 1963], No. 37602/63. Heading G1N. Manually portable apparatus for identifying or locating a power supply cable or a metal pipe carrying an alternating current comprises two coils mounted so that, in use, their axes make equal and opposite oblique angles to the horizontal and means for separately but simultaneously indicating the magnitudes of the signals induced in the two coils or separately but simultaneously indicating the sum and the difference of the magnitudes of the signals induced in the two coils. As shown in Fig. 1, the two coils 10, 11 have their axes at 45 degrees to the horizontal but they may be at 20 to 30 degrees to the horizontal or adjustable. A four position switch 17 enables the signals induced in the coils to be fed separately to the gauged attenuators 20 or combined in phase or antiphase and the connections of one coil to be reversed. The attenuators have a calibrated control 21. A pair of adjustable matched amplifiers 22, 23 and detectors feed a crossed pointer indicator. Alternatively, headphones may be used, each amplifier and detector feeding a separate ear piece. The apparatus may have an elongated tubular handle.
GB3760263A 1963-09-24 1963-09-24 Improvements in or relating to electric conductor identification apparatus Expired GB1056768A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3760263A GB1056768A (en) 1963-09-24 1963-09-24 Improvements in or relating to electric conductor identification apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3760263A GB1056768A (en) 1963-09-24 1963-09-24 Improvements in or relating to electric conductor identification apparatus

Publications (1)

Publication Number Publication Date
GB1056768A true GB1056768A (en) 1967-01-25

Family

ID=10397677

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3760263A Expired GB1056768A (en) 1963-09-24 1963-09-24 Improvements in or relating to electric conductor identification apparatus

Country Status (1)

Country Link
GB (1) GB1056768A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2651961A1 (en) * 1976-11-15 1978-05-18 Fritzsche Wilfried Electromagnetic detector system for metal ball bearings - operates with offset coils in non-magnetic tube as null point detector
US4255710A (en) * 1978-05-19 1981-03-10 Weber Harold J Plural search frequency directional metal detector apparatus having enhanced sensitivity
US4263552A (en) * 1978-12-08 1981-04-21 Weber Harold J Translative intelligencer apparatus providing polyindicative response
US4405926A (en) 1976-07-12 1983-09-20 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Methods and apparatus for warning aircraft of the presence and direction of electrical transmission lines
EP0119708A2 (en) * 1983-02-16 1984-09-26 Mark Ian Howell Electromagnetic surveying of pipes and cables
FR2619905A1 (en) * 1987-08-25 1989-03-03 Pechiney Electrometallurgie METHOD AND DEVICE FOR MEASURING THE POSITION OF CURRENT LINES AND ELECTRODE POINTS IN A POLYPHASE, SUBMERGED ARC ELECTRIC FURNACE
US5337002A (en) * 1991-03-01 1994-08-09 Mercer John E Locator device for continuously locating a dipole magnetic field transmitter and its method of operation
GB2280270A (en) * 1993-06-29 1995-01-25 Roke Manor Research Improvements in or relating to apparatus for the detection of buried elongate conductive objects
US6002258A (en) * 1991-03-01 1999-12-14 Digital Control, Inc. Method for locating a boring tool
US6008651A (en) * 1991-03-01 1999-12-28 Digital Control, Inc. Orientation sensor arrangement and method for use in a system for monitoring the orientation of an underground boring tool
US7282920B2 (en) 2002-10-02 2007-10-16 Mclaughlin Manufacturing Company, Inc. System and method for locating underground utilities carrying passive signals

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4405926A (en) 1976-07-12 1983-09-20 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Methods and apparatus for warning aircraft of the presence and direction of electrical transmission lines
DE2651961A1 (en) * 1976-11-15 1978-05-18 Fritzsche Wilfried Electromagnetic detector system for metal ball bearings - operates with offset coils in non-magnetic tube as null point detector
US4255710A (en) * 1978-05-19 1981-03-10 Weber Harold J Plural search frequency directional metal detector apparatus having enhanced sensitivity
US4263552A (en) * 1978-12-08 1981-04-21 Weber Harold J Translative intelligencer apparatus providing polyindicative response
EP0119708A2 (en) * 1983-02-16 1984-09-26 Mark Ian Howell Electromagnetic surveying of pipes and cables
EP0119708A3 (en) * 1983-02-16 1984-12-05 Mark Ian Howell Electromagnetic surveying of pipes and cables
US4672321A (en) * 1983-02-16 1987-06-09 Howell Mark I Method and apparatus for electromagnetically surveying a remote elongate conductor employing a detector assembly having plural electromagnetic transducer assemblies
FR2619905A1 (en) * 1987-08-25 1989-03-03 Pechiney Electrometallurgie METHOD AND DEVICE FOR MEASURING THE POSITION OF CURRENT LINES AND ELECTRODE POINTS IN A POLYPHASE, SUBMERGED ARC ELECTRIC FURNACE
EP0306417A1 (en) * 1987-08-25 1989-03-08 Pechiney Electrometallurgie Method and device for measuring the position at the current lines and the ends of the electrodes in a multiphase electrical furnace with immersed arcs
US5926025A (en) * 1991-03-01 1999-07-20 Digital Control, Inc. Method of finding an above-ground point in relation to an in-ground boring tool
US6232780B1 (en) 1991-03-01 2001-05-15 Digital Control Incorporated Underground locating using a locating signal transmitter configured with a single antenna
US7521933B2 (en) 1991-03-01 2009-04-21 Merlin Technology, Inc. Position and orientation locator/monitor
US5337002A (en) * 1991-03-01 1994-08-09 Mercer John E Locator device for continuously locating a dipole magnetic field transmitter and its method of operation
US5990682A (en) * 1991-03-01 1999-11-23 Digital Control, Inc. Method for determining the depth of an in-ground boring tool
US5990683A (en) * 1991-03-01 1999-11-23 Digital Control Incorporated Method and arrangement for locating a boring tool using a three-antennae vector sum
US6002258A (en) * 1991-03-01 1999-12-14 Digital Control, Inc. Method for locating a boring tool
US6008651A (en) * 1991-03-01 1999-12-28 Digital Control, Inc. Orientation sensor arrangement and method for use in a system for monitoring the orientation of an underground boring tool
US6057687A (en) * 1991-03-01 2000-05-02 Digital Control Incorporated Two mode boring tool guiding system and method
US7345486B2 (en) 1991-03-01 2008-03-18 Merlin Technology, Inc. Position and orientation locator/monitor
US6525538B1 (en) 1991-03-01 2003-02-25 Digital Control Incorporated Position and orientation locator/monitor
US6756784B2 (en) 1991-03-01 2004-06-29 Merlin Technology, Inc. Orientation sensor arrangement and method for use in a system for monitoring the orientation of an underground boring tool
US6924645B2 (en) 1991-03-01 2005-08-02 Merlin Technology, Inc. Position and orientation locator/monitor
US7167005B2 (en) 1991-03-01 2007-01-23 Merlin Technology, Inc. Position and orientation locator/monitor
GB2280270A (en) * 1993-06-29 1995-01-25 Roke Manor Research Improvements in or relating to apparatus for the detection of buried elongate conductive objects
GB2280270B (en) * 1993-06-29 1997-06-11 Roke Manor Research Improvements in or relating to apparatus for the detection of buried elongate conductive objects
US7282920B2 (en) 2002-10-02 2007-10-16 Mclaughlin Manufacturing Company, Inc. System and method for locating underground utilities carrying passive signals

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