GB614628A - Improvements in or relating to resistance thermometers - Google Patents

Improvements in or relating to resistance thermometers

Info

Publication number
GB614628A
GB614628A GB1027545A GB1027545A GB614628A GB 614628 A GB614628 A GB 614628A GB 1027545 A GB1027545 A GB 1027545A GB 1027545 A GB1027545 A GB 1027545A GB 614628 A GB614628 A GB 614628A
Authority
GB
United Kingdom
Prior art keywords
resistance
thermometer
temperature
galvanometer
thermometers
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
GB1027545A
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.)
CHARLES EDGAR HACKETT
FOSTER INSTR Co Ltd
Original Assignee
CHARLES EDGAR HACKETT
FOSTER INSTR 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 CHARLES EDGAR HACKETT, FOSTER INSTR Co Ltd filed Critical CHARLES EDGAR HACKETT
Priority to GB1027545A priority Critical patent/GB614628A/en
Publication of GB614628A publication Critical patent/GB614628A/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
    • G01K7/18—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 linear resistance, e.g. platinum resistance thermometer
    • G01K7/20—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 linear resistance, e.g. platinum resistance thermometer in a specially-adapted circuit, e.g. bridge circuit

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)

Abstract

614,628. Electric thermometers. FOSTER INSTRUMENT CO., Ltd., and HACKETT, C. E. April 24, 1945, No. 10275. [Class 40 (i)] [Also in Group XXXVI] A resistance thermometer comprises a composite resistance made up of at least two component resistances of different materials such that the resistance-temperature curve is 'of predetermined form. For example, two wires such as platinum and nickel may be joined in series in the correct proportion on a common insulating former to produce a composite wire having a straight line characteristic. Two such thermometers can be used, e.g. in a Wheatstone bridge to give an accurate measure of the temperature difference regardless of the actual temperature. In the arrangement, Fig. 2, a Wheatstone bridge is balanced and a galvanometer 11 scaled 0‹ to 15‹ C. is at zero corresponding to thermometer 9 at 0‹ C. in series with external fixed resistance 13a which together form one arm of the bridge. Under these circuit conditions any increase in resistance of the thermometer 9 corresponding to its increase in temperature over the range 0‹ to 15‹ C. is directly measurable on the galvanometer 11. The measuring range may be increased to 25‹ C. by adding 10 to the scale reading and substituting a resistance 13b for 13a. Similarly, resistance 13c substituted for 13b adds 20 to the scale and so on to the lowest value resistance 13m, and finally with no external resistance at all in the circuit as at switch position 14n.
GB1027545A 1945-04-24 1945-04-24 Improvements in or relating to resistance thermometers Expired GB614628A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1027545A GB614628A (en) 1945-04-24 1945-04-24 Improvements in or relating to resistance thermometers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1027545A GB614628A (en) 1945-04-24 1945-04-24 Improvements in or relating to resistance thermometers

Publications (1)

Publication Number Publication Date
GB614628A true GB614628A (en) 1948-12-20

Family

ID=9964841

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1027545A Expired GB614628A (en) 1945-04-24 1945-04-24 Improvements in or relating to resistance thermometers

Country Status (1)

Country Link
GB (1) GB614628A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2900820A (en) * 1955-07-28 1959-08-25 Serafin Ardis Differential oral thermometer
US3044298A (en) * 1957-12-16 1962-07-17 Socony Mobil Oil Co Inc Unbalanced bridge measurements of borehole temperature

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2900820A (en) * 1955-07-28 1959-08-25 Serafin Ardis Differential oral thermometer
US3044298A (en) * 1957-12-16 1962-07-17 Socony Mobil Oil Co Inc Unbalanced bridge measurements of borehole temperature

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