GB1054248A - Proximity Detector - Google Patents

Proximity Detector

Info

Publication number
GB1054248A
GB1054248A GB3270562A GB3270562A GB1054248A GB 1054248 A GB1054248 A GB 1054248A GB 3270562 A GB3270562 A GB 3270562A GB 3270562 A GB3270562 A GB 3270562A GB 1054248 A GB1054248 A GB 1054248A
Authority
GB
United Kingdom
Prior art keywords
circuit
proximity detector
aug
relay
detector
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
GB3270562A
Inventor
Roger Victor Gamon
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.)
Burndept Ltd
Original Assignee
Burndept 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 Burndept Ltd filed Critical Burndept Ltd
Priority to GB3270562A priority Critical patent/GB1054248A/en
Publication of GB1054248A publication Critical patent/GB1054248A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G01F23/265—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors for discrete levels
    • 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
    • H03K17/955—Proximity switches using a capacitive detector

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Electronic Switches (AREA)

Abstract

1, 054, 248. Proximity detector. BURNDEPT Ltd. Aug. 26, 1963 [ Aug. 24, 1962], No. 32705/62. Heading G1N. [ Also in Division H3] A Piezo-electric crystal 20 may be inserted in the oscillator circuit of an electronic proximity detector either where shown or in jack 22, so that the circuit will oscillate either because of the presence or because of the absence of material (e. g. water) in the neighbourhood of a capacitive probe connected to a socket 18 in an L-C circuit 12, 14, 16. When the circuit oscillates, a voltage is produced across a coil 32 and a transistor 30 energizes a relay 40. The detector may be made to "fail safe" by arranging that a danger condition which it is to detect shall lead to de-energizing of the relay.
GB3270562A 1962-08-24 1962-08-24 Proximity Detector Expired GB1054248A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3270562A GB1054248A (en) 1962-08-24 1962-08-24 Proximity Detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3270562A GB1054248A (en) 1962-08-24 1962-08-24 Proximity Detector

Publications (1)

Publication Number Publication Date
GB1054248A true GB1054248A (en) 1967-01-04

Family

ID=1758029

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3270562A Expired GB1054248A (en) 1962-08-24 1962-08-24 Proximity Detector

Country Status (1)

Country Link
GB (1) GB1054248A (en)

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