GB944735A - Improvements in or relating to temperature sensitive and/or measuring devices - Google Patents

Improvements in or relating to temperature sensitive and/or measuring devices

Info

Publication number
GB944735A
GB944735A GB3059661A GB3059661A GB944735A GB 944735 A GB944735 A GB 944735A GB 3059661 A GB3059661 A GB 3059661A GB 3059661 A GB3059661 A GB 3059661A GB 944735 A GB944735 A GB 944735A
Authority
GB
United Kingdom
Prior art keywords
oscillator
tuned circuit
relating
measuring devices
temperature sensitive
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
GB3059661A
Inventor
Kenneth Armstrong Varty
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.)
CA Parsons and Co Ltd
Original Assignee
CA Parsons and Co 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 CA Parsons and Co Ltd filed Critical CA Parsons and Co Ltd
Priority to GB3059661A priority Critical patent/GB944735A/en
Publication of GB944735A publication Critical patent/GB944735A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
    • G01K7/24—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit
    • G01K7/245—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit in an oscillator circuit

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

944,735. Transistor oscillators. C. A. PARSONS & CO. Ltd. July 20, 1962 [Aug. 24, 1961], No. 30596/61. Heading H3T. [Also in Division G1] A variable frequency oscillator 2 (Fig. 1) comprises a transistor T having a tuned circuit L 1 , C 1 between the base and emitter, and a biasing resistor R 1 between the base and collector to provide stabilising negative feedback. The D.C. supply may be obtained from another oscillator 7 (Fig. 2) feeding through a static tuned circuit 6 to a tuned circuit 9, and rectifier and smoothing components mounted with oscillator 2 for rotation. The frequency of oscillator 2 is varied by a thermistor 1 connected across part of tuning coil L 1 .
GB3059661A 1961-08-24 1961-08-24 Improvements in or relating to temperature sensitive and/or measuring devices Expired GB944735A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3059661A GB944735A (en) 1961-08-24 1961-08-24 Improvements in or relating to temperature sensitive and/or measuring devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3059661A GB944735A (en) 1961-08-24 1961-08-24 Improvements in or relating to temperature sensitive and/or measuring devices

Publications (1)

Publication Number Publication Date
GB944735A true GB944735A (en) 1963-12-18

Family

ID=10310118

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3059661A Expired GB944735A (en) 1961-08-24 1961-08-24 Improvements in or relating to temperature sensitive and/or measuring devices

Country Status (1)

Country Link
GB (1) GB944735A (en)

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