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GB894208A - Improvements in or relating to circuit arrangements for measuring or detecting smallcapacitance variations - Google Patents

Improvements in or relating to circuit arrangements for measuring or detecting smallcapacitance variations

Info

Publication number
GB894208A
GB894208A GB3376058A GB3376058A GB894208A GB 894208 A GB894208 A GB 894208A GB 3376058 A GB3376058 A GB 3376058A GB 3376058 A GB3376058 A GB 3376058A GB 894208 A GB894208 A GB 894208A
Authority
GB
United Kingdom
Prior art keywords
capacitance
variations
variable
smallcapacitance
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
GB3376058A
Inventor
Albert Churchill
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.)
MARDYKE ELECTRICS Ltd
Original Assignee
MARDYKE ELECTRICS 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 MARDYKE ELECTRICS Ltd filed Critical MARDYKE ELECTRICS Ltd
Priority to GB3376058A priority Critical patent/GB894208A/en
Publication of GB894208A publication Critical patent/GB894208A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

894,208. Inclinometers. MARDYKE ELECTRICS Ltd. Oct. 6, 1959 [Oct. 22, 1958], No. 33760/58. Class 40(1). [Also in Group XXXVI] An inclinometer comprises four plates P2 mutually at right-angles, on a base BS surrounding a pendulum P, the variation in capacitance between the pendulum and each of the plates P2 being indicative of the deflection relative to the base, and measured in four capacitance-responsive circuits each comprising a transistor beatfrequency oscillator variable in frequency by the capacitance between P, P2, which supplies a bandpass amplifier whose output is variable in response to the capacitance variations, and is rectified and amplified to operate an indicator. The oscillator may alternatively operate at a fixed frequency, and the band-pass amplifier is tuned by the variable capacitance.
GB3376058A 1958-10-22 1958-10-22 Improvements in or relating to circuit arrangements for measuring or detecting smallcapacitance variations Expired GB894208A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3376058A GB894208A (en) 1958-10-22 1958-10-22 Improvements in or relating to circuit arrangements for measuring or detecting smallcapacitance variations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3376058A GB894208A (en) 1958-10-22 1958-10-22 Improvements in or relating to circuit arrangements for measuring or detecting smallcapacitance variations

Publications (1)

Publication Number Publication Date
GB894208A true GB894208A (en) 1962-04-18

Family

ID=10357094

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3376058A Expired GB894208A (en) 1958-10-22 1958-10-22 Improvements in or relating to circuit arrangements for measuring or detecting smallcapacitance variations

Country Status (1)

Country Link
GB (1) GB894208A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2175397A (en) * 1983-11-22 1986-11-26 Honda Motor Co Ltd Devices for detecting objects
GB2238381A (en) * 1989-10-17 1991-05-29 Motoda Electronics Detecting verticality and maintaining level
FR2698519A1 (en) * 1992-11-27 1994-06-03 Pioneer France Mais Sa Grain counting device for seeding in particular.

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2175397A (en) * 1983-11-22 1986-11-26 Honda Motor Co Ltd Devices for detecting objects
GB2175397B (en) * 1983-11-22 1990-01-17 Honda Motor Co Ltd Devices for detecting objects
GB2238381A (en) * 1989-10-17 1991-05-29 Motoda Electronics Detecting verticality and maintaining level
GB2238381B (en) * 1989-10-17 1994-03-30 Motoda Electronics Verticality detection and level maintenance
FR2698519A1 (en) * 1992-11-27 1994-06-03 Pioneer France Mais Sa Grain counting device for seeding in particular.
WO1994012011A1 (en) * 1992-11-27 1994-06-09 S.A.R.L. Agrotique Seed counter device, in particular for sowing machines

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