GB1195471A - Improvements in or relating to Apparatus for Providing a Representation of Engine-Life - Google Patents

Improvements in or relating to Apparatus for Providing a Representation of Engine-Life

Info

Publication number
GB1195471A
GB1195471A GB2346968A GB2346968A GB1195471A GB 1195471 A GB1195471 A GB 1195471A GB 2346968 A GB2346968 A GB 2346968A GB 2346968 A GB2346968 A GB 2346968A GB 1195471 A GB1195471 A GB 1195471A
Authority
GB
United Kingdom
Prior art keywords
fed
amplifier
output
transistor
thermocouple
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
GB2346968A
Inventor
John Fawcett Ogilvie Evans
Derek Anthony Rush
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.)
Smiths Group PLC
Original Assignee
Smiths Group PLC
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 Smiths Group PLC filed Critical Smiths Group PLC
Priority to DE19691901226 priority Critical patent/DE1901226A1/en
Priority to SE00399/69A priority patent/SE353606B/xx
Priority to US790991A priority patent/US3527086A/en
Priority to FR6900590A priority patent/FR2000266B1/fr
Publication of GB1195471A publication Critical patent/GB1195471A/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
    • G01K3/00—Thermometers giving results other than momentary value of temperature
    • G01K3/02—Thermometers giving results other than momentary value of temperature giving means values; giving integrated values
    • G01K3/04—Thermometers giving results other than momentary value of temperature giving means values; giving integrated values in respect of time
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/02—Means for indicating or recording specially adapted for thermometers
    • G01K1/026—Means for indicating or recording specially adapted for thermometers arrangements for monitoring a plurality of temperatures, e.g. by multiplexing
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C3/00—Registering or indicating the condition or the working of machines or other apparatus, other than vehicles

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)

Abstract

1,195,471. Transistor amplifying circuits; pulse modulation circuits. SMITHS INDUSTRIES Ltd. 13 Jan., 1969 [l5 Jan., 1968; 17 May, 1968], No. 2234/68. Headings H3T and H4L. [Also in Divisions G1 and G4] A current-to-frequency converter (Fig. 4) comprises a capacitor 43 connected across an amplifier 42 which together integrate the input current. The output is fed to a control circuit 45 which emits a pulse at a predetermined level to cause transistor 44 to conduct and discharge capacitor 43. The output is a sawtooth voltage whose frequency is determined by the input level. Amplifier (Fig. 6).-The signal from a bridge 90, indicating the deviation from a predetermined value of the temperature measured by a thermocouple 51, is fed to a chopper amplifier 93 comprising a double emitter transistor 95 fed with A.C. at terminals 97. The resulting square wave output is amplified at 98 and supplied in parallel to two transistors 100, 101 fed with the same A.C. in opposite phase on their second emitters. The resulting alternate pulses of D.C. are fed to amplifier 104, with smoothing provided by capacitors 107, 108, the output at 52 being proportional to the input signal. Negative feedback via integrating network 109 provides a phase-advance component to compensate for time lag in the operation of the thermocouple 51.
GB2346968A 1968-01-15 1968-01-15 Improvements in or relating to Apparatus for Providing a Representation of Engine-Life Expired GB1195471A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19691901226 DE1901226A1 (en) 1968-01-15 1969-01-11 Device to display the service life of an engine
SE00399/69A SE353606B (en) 1968-01-15 1969-01-14
US790991A US3527086A (en) 1968-01-15 1969-01-14 Apparatus for providing a representation of engine life
FR6900590A FR2000266B1 (en) 1968-01-15 1969-01-15

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB223468 1968-01-15

Publications (1)

Publication Number Publication Date
GB1195471A true GB1195471A (en) 1970-06-17

Family

ID=9735965

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2346968A Expired GB1195471A (en) 1968-01-15 1968-01-15 Improvements in or relating to Apparatus for Providing a Representation of Engine-Life

Country Status (1)

Country Link
GB (1) GB1195471A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2181250A (en) * 1985-10-04 1987-04-15 Semco Instr Inc Comprehensive turbine engine monitor and recorder system
WO2008017519A1 (en) * 2006-08-11 2008-02-14 Siemens Aktiengesellschaft Method for operating a turbine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2181250A (en) * 1985-10-04 1987-04-15 Semco Instr Inc Comprehensive turbine engine monitor and recorder system
GB2181250B (en) * 1985-10-04 1989-12-06 Semco Instr Inc Comprehensive engine monitor and recorder
WO2008017519A1 (en) * 2006-08-11 2008-02-14 Siemens Aktiengesellschaft Method for operating a turbine
EP1890012A1 (en) * 2006-08-11 2008-02-20 Siemens Aktiengesellschaft Method for running a gasturbine

Similar Documents

Publication Publication Date Title
GB2096771A (en) Temperature sensing device
GB1385660A (en) Resistance-to-frequency converter
US3737640A (en) Electronic feedback controlled time-division multiplier and/or divider
US2860241A (en) Ratio computer
US3169233A (en) Voltage to frequency converter
GB1195471A (en) Improvements in or relating to Apparatus for Providing a Representation of Engine-Life
GB1319363A (en) Signal converter circuits
GB1089339A (en) Improvements in or relating to multiplicative mixing with transistors
US4987320A (en) Multiphase multiplier
US3544812A (en) Analog multiplier
GB1111276A (en) Differential amplifier
GB1317625A (en) Variable reactance circuits
US3550029A (en) Feedback amplifier arrangement
US3588728A (en) Impedance bridge transducer circuits
US3681700A (en) Accurate square-law detector circuit
GB1202073A (en) Apparatus for detecting a null between input, phase opposed, a.c. analog signals
US4242644A (en) Pulse modulator for operating a device in the avalanche mode
GB1453475A (en) Counting-rate meter
SU390472A1 (en) CONVERTER PARAMETERS COMPLEX
US3467912A (en) Sensitive regenerative amplifier
GB1197224A (en) Frequency-Controlled Oscillators
SU375753A1 (en) LOGARIFMIC AMPLIFIER
GB1268649A (en) Voltage-to-frequency conversion apparatus
SU378873A1 (en) DIFFERENTIATING DEVICE
SU564641A1 (en) Frequency multiplying device

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee