GB915021A - Improvements relating to electronic switching devices - Google Patents

Improvements relating to electronic switching devices

Info

Publication number
GB915021A
GB915021A GB2262858A GB2262858A GB915021A GB 915021 A GB915021 A GB 915021A GB 2262858 A GB2262858 A GB 2262858A GB 2262858 A GB2262858 A GB 2262858A GB 915021 A GB915021 A GB 915021A
Authority
GB
United Kingdom
Prior art keywords
valve
grid
july
tap
connected via
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
GB2262858A
Inventor
Eric Lewis
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.)
THOMAS IND AUTOMATION Ltd
Original Assignee
THOMAS IND AUTOMATION 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 THOMAS IND AUTOMATION Ltd filed Critical THOMAS IND AUTOMATION Ltd
Priority to GB2262858A priority Critical patent/GB915021A/en
Publication of GB915021A publication Critical patent/GB915021A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
    • G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
    • 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)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

915,021. Valve oscillating circuits. THOMAS INDUSTRIAL AUTOMATION Ltd. July 15, 1959 [July 15, 1958; Aug. 1, 1958], Nos. 22628/58 and 24839/58. Class 40 (6). [Also in Group XXXVI] An oscillator used in an electronic proximity switch (see Group XXXVI) comprises a valve 1 with its grid connected via condenser 6 and grid leak 7 to a tap on a grid circuit inductance 5 and its cathode connected via bias resistor 9 to a tap on a cathode circuit inductance 8. The two inductances are tuned to the same frequency and coupled together by a top capacity coupling, the condenser being included in a plug-in probe unit 2, 4. The first Provisional Specification shows a valve of screengrid type as oscillator.
GB2262858A 1958-07-15 1958-07-15 Improvements relating to electronic switching devices Expired GB915021A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2262858A GB915021A (en) 1958-07-15 1958-07-15 Improvements relating to electronic switching devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2262858A GB915021A (en) 1958-07-15 1958-07-15 Improvements relating to electronic switching devices

Publications (1)

Publication Number Publication Date
GB915021A true GB915021A (en) 1963-01-09

Family

ID=10182516

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2262858A Expired GB915021A (en) 1958-07-15 1958-07-15 Improvements relating to electronic switching devices

Country Status (1)

Country Link
GB (1) GB915021A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0191137A2 (en) * 1984-09-22 1986-08-20 Heinrich Jores Capacitive high-sensitivity sensor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0191137A2 (en) * 1984-09-22 1986-08-20 Heinrich Jores Capacitive high-sensitivity sensor
EP0191137A3 (en) * 1984-09-22 1987-06-03 Heinrich Jores Capacitive high-sensitivity sensor

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