GB807232A - Improvements in and relating to temperature measuring devices - Google Patents

Improvements in and relating to temperature measuring devices

Info

Publication number
GB807232A
GB807232A GB2120855A GB2120855A GB807232A GB 807232 A GB807232 A GB 807232A GB 2120855 A GB2120855 A GB 2120855A GB 2120855 A GB2120855 A GB 2120855A GB 807232 A GB807232 A GB 807232A
Authority
GB
United Kingdom
Prior art keywords
thermistor
resistance
transistor
resistor
meter
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
GB2120855A
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.)
JOSEPH CHAPMAN ANDERSON
Original Assignee
JOSEPH CHAPMAN ANDERSON
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 JOSEPH CHAPMAN ANDERSON filed Critical JOSEPH CHAPMAN ANDERSON
Priority to GB2120855A priority Critical patent/GB807232A/en
Publication of GB807232A publication Critical patent/GB807232A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

807,232. Electrical indicating systems. ANDERSON, J. C. Oct. 17, 1956 [July 22, 1955], No. 21208/55. Class 40 (1). In a temperature measuring device, a thermistor 1 (Fig. 1), constitutes the whole, or part, of the bias resistance of a transistor 6, changes in the resistance value of thermistor 1 producing corresponding changes in the collector current of the transistor, the value of which current is measured by a galvonometer-type meter 7, calibrated to give direct temperature readings. The thermistor 1 is normally in circuit whereas the resistor 12 is not. To adjust the zero reading of the meter, the thermistor 1 is replaced by resistor 12, adjusted to have a resistance value equal to that of the thermistor 1 at a prearranged temperature, and the value of resistance 10 is adjusted to give the desired zero reading. The sensitivity is dependent upon the value of resistance 2. In a modified arrangement (Fig. 2) two transistors 13, 14 are used, only the former being controlled by thermistor 1, and the meter is connected between the two collectors. Variations in the characteristics of the transistor 13 with variations in operating temperature are thus compensated by similar variations in those of transistor 14. The meter is zeroed by switching resistor 21 into circuit in place of the parallel combination of thermistor 1 and resistor 18 and then adjusting variable resistance 25. The transistors are preferably housed in a thermal sink consisting of a metal casing of large thermal capacity.
GB2120855A 1955-07-22 1955-07-22 Improvements in and relating to temperature measuring devices Expired GB807232A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2120855A GB807232A (en) 1955-07-22 1955-07-22 Improvements in and relating to temperature measuring devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2120855A GB807232A (en) 1955-07-22 1955-07-22 Improvements in and relating to temperature measuring devices

Publications (1)

Publication Number Publication Date
GB807232A true GB807232A (en) 1959-01-14

Family

ID=10159000

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2120855A Expired GB807232A (en) 1955-07-22 1955-07-22 Improvements in and relating to temperature measuring devices

Country Status (1)

Country Link
GB (1) GB807232A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3548661A (en) * 1969-03-11 1970-12-22 Philip Morris Inc Electrical thermometer
WO1985000424A1 (en) * 1983-06-30 1985-01-31 Beckman Instruments, Inc. Temperature measurement probe

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3548661A (en) * 1969-03-11 1970-12-22 Philip Morris Inc Electrical thermometer
WO1985000424A1 (en) * 1983-06-30 1985-01-31 Beckman Instruments, Inc. Temperature measurement probe
US4545690A (en) * 1983-06-30 1985-10-08 Beckman Instruments, Inc. Temperature measurement probe for chemical reactions and method of use thereof
JPS60501721A (en) * 1983-06-30 1985-10-11 ベツクマン　インスツルメンツ　インコ−ポレ−テツド Temperature measurement probe

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