GB616701A - Improvements in or relating to electronic devices for locating discontinuities in the electrical characteristics of a medium - Google Patents

Improvements in or relating to electronic devices for locating discontinuities in the electrical characteristics of a medium

Info

Publication number
GB616701A
GB616701A GB2536945A GB2536945A GB616701A GB 616701 A GB616701 A GB 616701A GB 2536945 A GB2536945 A GB 2536945A GB 2536945 A GB2536945 A GB 2536945A GB 616701 A GB616701 A GB 616701A
Authority
GB
United Kingdom
Prior art keywords
relating
medium
electronic devices
electrical characteristics
grid voltages
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
GB2536945A
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.)
BOLESLAW STARNECKI
MIECZYSLAW ROSOSINSKI
Original Assignee
BOLESLAW STARNECKI
MIECZYSLAW ROSOSINSKI
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 BOLESLAW STARNECKI, MIECZYSLAW ROSOSINSKI filed Critical BOLESLAW STARNECKI
Priority to GB2536945A priority Critical patent/GB616701A/en
Publication of GB616701A publication Critical patent/GB616701A/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

Landscapes

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

Abstract

616,701. Locating conductors. STARNECKI, B., and ROSOSINSKI, M. Sept. 29, 1945, No. 25369. [Class 37] A mine detector or the like comprises a pair of oscillators tuned by Lecher-systems 6, 7 coupled to antennµ 17, 18 with which the ground is explored. In the absence or irregularities, both antennµ are equally affected and the grid voltages of the oscillators are equal. At other times a difference in the grid voltages arises and is detected by an audio-frequency oscillator which is biassed so as normally just not to oscillate, but breaks into oscillation when a difference in the oscillator grid voltages is in the appropriate direction.
GB2536945A 1945-09-29 1945-09-29 Improvements in or relating to electronic devices for locating discontinuities in the electrical characteristics of a medium Expired GB616701A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2536945A GB616701A (en) 1945-09-29 1945-09-29 Improvements in or relating to electronic devices for locating discontinuities in the electrical characteristics of a medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2536945A GB616701A (en) 1945-09-29 1945-09-29 Improvements in or relating to electronic devices for locating discontinuities in the electrical characteristics of a medium

Publications (1)

Publication Number Publication Date
GB616701A true GB616701A (en) 1949-01-26

Family

ID=10226555

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2536945A Expired GB616701A (en) 1945-09-29 1945-09-29 Improvements in or relating to electronic devices for locating discontinuities in the electrical characteristics of a medium

Country Status (1)

Country Link
GB (1) GB616701A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2153077A (en) * 1983-10-18 1985-08-14 David Crone Metal detecting apparatus
US4540943A (en) * 1981-10-06 1985-09-10 Akers Oliver C Belt-supported swingable metal detector
GB2169711A (en) * 1985-01-11 1986-07-16 Baumer Electric Ag Proximity switch
EP0957377A2 (en) * 1998-05-15 1999-11-17 Firma Ing. Klaus Ebinger Device and method for locating metal objects

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4540943A (en) * 1981-10-06 1985-09-10 Akers Oliver C Belt-supported swingable metal detector
GB2153077A (en) * 1983-10-18 1985-08-14 David Crone Metal detecting apparatus
GB2169711A (en) * 1985-01-11 1986-07-16 Baumer Electric Ag Proximity switch
EP0957377A2 (en) * 1998-05-15 1999-11-17 Firma Ing. Klaus Ebinger Device and method for locating metal objects
EP0957377A3 (en) * 1998-05-15 2002-04-17 Firma Ing. Klaus Ebinger Device and method for locating metal objects

Similar Documents

Publication Publication Date Title
GB616701A (en) Improvements in or relating to electronic devices for locating discontinuities in the electrical characteristics of a medium
ES178724A1 (en) IMPROVEMENTS IN OSCILLATION GENERATING SYSTEMS
JPS5249541A (en) Alarm or indication system for vehicles
CA425740A (en) Vibration and oscillation indicator
AU128396B2 (en) Improvements in instruments for measuring the frequency ofan electrical oscillation
AU2316145A (en) Improvements in instruments for measuring the frequency ofan electrical oscillation
AU124694B2 (en) Oscillation generator for low frequencies
CA431381A (en) Electrical oscillation modulation system
AU126918B2 (en) Improved frequency modulation system with crystal oscillator
AU125294B2 (en) Oscillation generator
GB598203A (en) Improvements in apparatus for comparing frequencies of electric oscillations
CA492253A (en) Circuit arrangements for stabilising the amplitude of electrical oscillations
AU126698B2 (en) Improvements in or relating to oscillation generators
AU127839B2 (en) Improvements in or relating to frequency modulation detectors
AU2347845A (en) Improvements in electrical frequency meters
CA430562A (en) Frequency modulation system
AU126108B2 (en) Improvements in or relating to circuit arrangements for limiting the amplitude variations ofan electrical oscillation
CA431695A (en) Soil gas prospecting method
ES393027A1 (en) Circuit arrangement for an electronic distance measuring device for drawing the frequency of a measuring oscillator towards a set point frequency which is higher or lower, respectively, by a certain predetermined value
AU127864B2 (en) Frequency measuring system
DK74057C (en) Coupling to derive from a periodically variable signal voltage a similarly periodically variable measuring voltage of lower fundamental frequency, but of the same waveform, and an oscillograph with such a coupling.
CA430416A (en) Oscillator system
CH270708A (en) Frequency modulated oscillator.
CH260641A (en) Electrical system comprising a transmitter clock and receiver clocks.
AU2344445A (en) Synchronized oscillator frequency modulation detector