ZA756924B - Proximity switch - Google Patents

Proximity switch

Info

Publication number
ZA756924B
ZA756924B ZA00756924A ZA756924A ZA756924B ZA 756924 B ZA756924 B ZA 756924B ZA 00756924 A ZA00756924 A ZA 00756924A ZA 756924 A ZA756924 A ZA 756924A ZA 756924 B ZA756924 B ZA 756924B
Authority
ZA
South Africa
Prior art keywords
proximity switch
proximity
switch
Prior art date
Application number
ZA00756924A
Inventor
J Colwill
Original Assignee
Square D Co
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 Square D Co filed Critical Square D Co
Publication of ZA756924B publication Critical patent/ZA756924B/en

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
    • G01V3/101—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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/945—Proximity switches
    • H03K17/95—Proximity switches using a magnetic detector
    • H03K17/951—Measures for supplying operating voltage to the detector circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/945—Proximity switches
    • H03K17/95—Proximity switches using a magnetic detector
    • H03K17/952—Proximity switches using a magnetic detector using inductive coils
    • H03K17/9537—Proximity switches using a magnetic detector using inductive coils in a resonant circuit
    • H03K17/9542—Proximity switches using a magnetic detector using inductive coils in a resonant circuit forming part of an oscillator
    • H03K17/9547—Proximity switches using a magnetic detector using inductive coils in a resonant circuit forming part of an oscillator with variable 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)
  • Electronic Switches (AREA)
ZA00756924A 1974-11-22 1975-11-04 Proximity switch ZA756924B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB50629/74A GB1531217A (en) 1974-11-22 1974-11-22 Proximity switch

Publications (1)

Publication Number Publication Date
ZA756924B true ZA756924B (en) 1976-10-27

Family

ID=10456687

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00756924A ZA756924B (en) 1974-11-22 1975-11-04 Proximity switch

Country Status (5)

Country Link
CA (1) CA1060115A (en)
FR (1) FR2292242A1 (en)
GB (1) GB1531217A (en)
IT (1) IT1051270B (en)
ZA (1) ZA756924B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3041840C2 (en) * 1980-11-06 1989-01-12 Honeywell Gmbh, 6050 Offenbach Two-wire feed circuit
GB2180938B (en) * 1985-09-24 1990-02-28 Square D Co Low leakage, a c proximity switch circuit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1924279C3 (en) * 1969-05-13 1975-06-12 Hans 4330 Muelheim Turck Two-pole thyristor switching device for AC circuits
FR2148789A5 (en) * 1971-08-02 1973-03-23 Crouzet Sa

Also Published As

Publication number Publication date
CA1060115A (en) 1979-08-07
GB1531217A (en) 1978-11-08
FR2292242B1 (en) 1982-07-09
IT1051270B (en) 1981-04-21
FR2292242A1 (en) 1976-06-18

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