GB729706A - Improvements in or relating to electro-magnetic metal detecting instruments - Google Patents

Improvements in or relating to electro-magnetic metal detecting instruments

Info

Publication number
GB729706A
GB729706A GB22710/53A GB2271053A GB729706A GB 729706 A GB729706 A GB 729706A GB 22710/53 A GB22710/53 A GB 22710/53A GB 2271053 A GB2271053 A GB 2271053A GB 729706 A GB729706 A GB 729706A
Authority
GB
United Kingdom
Prior art keywords
coils
electro
relating
detecting instruments
magnetic metal
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
GB22710/53A
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Publication of GB729706A publication Critical patent/GB729706A/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
    • G01V3/15—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for use during transport, e.g. by a person, vehicle or boat

Abstract

729,706. Metal-detecting instruments. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. Aug. 18, 1953 [Aug. 20, 1952], No. 22710/53. Class 37. A device for detecting the presence of metallic bodies comprises two coils 1, 2 (Fig. 1), wound on a common former at right angles to each other so that they normally have no coupling except in the presence of a metallic body, one coil 1 being fed from an oscillator I, and the output from the other coil 2 being amplified at III and shown on a meter 5. The coils 1, 2 in an insulated housing 4 (Fig. 4) and the meter 5 may be mounted on a handle 7, a knob 8 being associated with a member which may be adjusted to ensure zero mutual inductance between the coils, e.g. by altering the position of one turn of one of the coils, or by moving an iron pin.
GB22710/53A 1952-08-20 1953-08-18 Improvements in or relating to electro-magnetic metal detecting instruments Expired GB729706A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE729706X 1952-08-20

Publications (1)

Publication Number Publication Date
GB729706A true GB729706A (en) 1955-05-11

Family

ID=6636007

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22710/53A Expired GB729706A (en) 1952-08-20 1953-08-18 Improvements in or relating to electro-magnetic metal detecting instruments

Country Status (1)

Country Link
GB (1) GB729706A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3061775A (en) * 1959-05-04 1962-10-30 Ind Electronics Inc Metal detector
US3457502A (en) * 1967-04-25 1969-07-22 Quantum Eng Inc Highly-stable orthogonal electric coil configuration
US3488577A (en) * 1967-09-01 1970-01-06 Canadian Patents Dev Asymmetric orthogonal coil susceptibility meter
GB2158240A (en) * 1984-04-26 1985-11-06 Standard Telephones Cables Ltd A null-balanced proximity sensor
GB2224849A (en) * 1988-11-01 1990-05-16 Outokumpu Oy Metal detector

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3061775A (en) * 1959-05-04 1962-10-30 Ind Electronics Inc Metal detector
US3457502A (en) * 1967-04-25 1969-07-22 Quantum Eng Inc Highly-stable orthogonal electric coil configuration
US3488577A (en) * 1967-09-01 1970-01-06 Canadian Patents Dev Asymmetric orthogonal coil susceptibility meter
GB2158240A (en) * 1984-04-26 1985-11-06 Standard Telephones Cables Ltd A null-balanced proximity sensor
GB2224849A (en) * 1988-11-01 1990-05-16 Outokumpu Oy Metal detector
GB2224849B (en) * 1988-11-01 1993-03-17 Outokumpu Oy Metal detector

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