GB967581A - Electrical circuits - Google Patents

Electrical circuits

Info

Publication number
GB967581A
GB967581A GB3321159A GB3321159A GB967581A GB 967581 A GB967581 A GB 967581A GB 3321159 A GB3321159 A GB 3321159A GB 3321159 A GB3321159 A GB 3321159A GB 967581 A GB967581 A GB 967581A
Authority
GB
United Kingdom
Prior art keywords
displacement
tuned circuit
whose
resistors
diodes
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
GB3321159A
Inventor
John David Haines
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.)
John Wyeth and Brother Ltd
Original Assignee
John Wyeth and Brother 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 John Wyeth and Brother Ltd filed Critical John Wyeth and Brother Ltd
Priority to GB3321159A priority Critical patent/GB967581A/en
Publication of GB967581A publication Critical patent/GB967581A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/243—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the phase or frequency of ac

Landscapes

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

Abstract

967,581. Measuring displacement electrically. JOHN WYETH & BROTHER Ltd. Dec. 30, 1960 [Sept. 30, 1959], No. 33211/59. Heading G1N. A transducer for measuring displacement controls the resonant frequency of a tuned circuit incorporated in a phase discriminator whose output voltage is therefore indicative of the magnitude and direction of the displacement. As shown (Fig. 1), the phase discriminator comprises two diodes 6, 7 whose cathodes are fed with A.C. from an oscillating valve 2, and whose anodes are fed with the vector sum of the voltage obtained through the coupling between tuned circuit 3 in the anode of valve 2 and tuned circuit 4, 5, and the voltage developed across resistor 10. Initially the diodes 6, 7 produce equal and opposite voltages across resistors 8b, 9b, giving zero indication on meter 16. The resonant frequency of tuned circuit 4, 5 is modified by a coupling coil 12 connected to an inductor 14 and capacitor 15 whose capacitance is changed by the displacement, whereby a resultant output voltage is produced across resistors 8b, 9b indicative of the change in capacitor 15, and therefore of the displacement. The displacement can be made to vary the inductance or the resistance of the external circuit 14, 15.
GB3321159A 1959-09-30 1959-09-30 Electrical circuits Expired GB967581A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3321159A GB967581A (en) 1959-09-30 1959-09-30 Electrical circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3321159A GB967581A (en) 1959-09-30 1959-09-30 Electrical circuits

Publications (1)

Publication Number Publication Date
GB967581A true GB967581A (en) 1964-08-26

Family

ID=10349994

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3321159A Expired GB967581A (en) 1959-09-30 1959-09-30 Electrical circuits

Country Status (1)

Country Link
GB (1) GB967581A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020115591A1 (en) 2020-06-12 2021-12-16 Heinz Werner Schenk Electrical system for determining measured variables, for example for thermal images

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020115591A1 (en) 2020-06-12 2021-12-16 Heinz Werner Schenk Electrical system for determining measured variables, for example for thermal images

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