GB969055A - Improvements in or relating to fault detection in moving-coil electric instrument circuits - Google Patents

Improvements in or relating to fault detection in moving-coil electric instrument circuits

Info

Publication number
GB969055A
GB969055A GB4488061A GB4488061A GB969055A GB 969055 A GB969055 A GB 969055A GB 4488061 A GB4488061 A GB 4488061A GB 4488061 A GB4488061 A GB 4488061A GB 969055 A GB969055 A GB 969055A
Authority
GB
United Kingdom
Prior art keywords
galvanometer
deflection
relating
moving
resistor
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
GB4488061A
Inventor
Julius Banga
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.)
Electroflo Meters Company Ltd
Original Assignee
Electroflo Meters Company 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 Electroflo Meters Company Ltd filed Critical Electroflo Meters Company Ltd
Priority to GB4488061A priority Critical patent/GB969055A/en
Publication of GB969055A publication Critical patent/GB969055A/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
    • G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
    • G01K7/021—Particular circuit arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

969,055. Fault testing. ELECTROFLO METERS CO. Ltd. Oct. 10,1962 [Dec. 14,1961], No.44880/61. Heading G1U. A temperature sensitive thermocouple 3 energizes a galvanometer 1 through calibration resistors 4, 2; the galvanometer deflection controlling the temperature of a furnace as described in Specifications 969,054 and 969,056. A Zenerdiode 5 is shunted across the galvanometer and resistor 2, and is energized over capacitor 6 and resistor 7 from A. C. energized transformer 8 so that the diode breakdown voltage is not exceeded while the thermocouple circuit is continuous, and the deflection is unaffected by the equal and opposite torque pulses produced in the galvanometer. Failure of the thermocouple circuit increases the resistance in parallel with the diode so that the latter conducts on alternate half cycles to cause full scale deflection of the galvanometer whereby the fault is indicated, a warning is operated and the furnace heating reduced.
GB4488061A 1961-12-14 1961-12-14 Improvements in or relating to fault detection in moving-coil electric instrument circuits Expired GB969055A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4488061A GB969055A (en) 1961-12-14 1961-12-14 Improvements in or relating to fault detection in moving-coil electric instrument circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4488061A GB969055A (en) 1961-12-14 1961-12-14 Improvements in or relating to fault detection in moving-coil electric instrument circuits

Publications (1)

Publication Number Publication Date
GB969055A true GB969055A (en) 1964-09-09

Family

ID=10435096

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4488061A Expired GB969055A (en) 1961-12-14 1961-12-14 Improvements in or relating to fault detection in moving-coil electric instrument circuits

Country Status (1)

Country Link
GB (1) GB969055A (en)

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