GB797085A - Improvements relating to electronic apparatus for detecting the presence of metal - Google Patents

Improvements relating to electronic apparatus for detecting the presence of metal

Info

Publication number
GB797085A
GB797085A GB1312555A GB1312555A GB797085A GB 797085 A GB797085 A GB 797085A GB 1312555 A GB1312555 A GB 1312555A GB 1312555 A GB1312555 A GB 1312555A GB 797085 A GB797085 A GB 797085A
Authority
GB
United Kingdom
Prior art keywords
metal
detecting
electronic apparatus
valve
improvements relating
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
GB1312555A
Inventor
Francis Arthur Jackson
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.)
Teledictor Ltd
Original Assignee
Teledictor Ltd
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 Teledictor Ltd filed Critical Teledictor Ltd
Priority to GB1312555A priority Critical patent/GB797085A/en
Publication of GB797085A publication Critical patent/GB797085A/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
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
    • G01V3/104—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils
    • 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
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
    • G01V3/101—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils by measuring the impedance of the search coil; by measuring features of a resonant circuit comprising the search coil
    • G01V3/102—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils by measuring the impedance of the search coil; by measuring features of a resonant circuit comprising the search coil by measuring amplitude

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

797,085. Locating conductors. TELEDICTOR, Ltd. April 3, 1956 [May 6, 1955], No. 13125/55. Class 37. In apparatus for detecting the presence of metal, comprising an oscillator circuit including a valve 16 to the grid of which is connected a first sensing coil 11 which is coaxial with, axially displaced from, and inductively coupled to, a second sensing coil 12 located in a tuned circuit incorporating a variable capacitor 13 and a damping resistor 14, the passage of a metal object through the two sensing coils 11, 12 stops oscillation in the oscillator circuit, thus energizing a relay 15 in the anode circuit of the valve 16. The apparatus may be used in conjunction with a device for counting metal objects.
GB1312555A 1955-05-06 1955-05-06 Improvements relating to electronic apparatus for detecting the presence of metal Expired GB797085A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1312555A GB797085A (en) 1955-05-06 1955-05-06 Improvements relating to electronic apparatus for detecting the presence of metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1312555A GB797085A (en) 1955-05-06 1955-05-06 Improvements relating to electronic apparatus for detecting the presence of metal

Publications (1)

Publication Number Publication Date
GB797085A true GB797085A (en) 1958-06-25

Family

ID=10017288

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1312555A Expired GB797085A (en) 1955-05-06 1955-05-06 Improvements relating to electronic apparatus for detecting the presence of metal

Country Status (1)

Country Link
GB (1) GB797085A (en)

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