GB981178A - Improvements in or relating to equivalent operating time apparatus - Google Patents

Improvements in or relating to equivalent operating time apparatus

Info

Publication number
GB981178A
GB981178A GB3690761A GB3690761A GB981178A GB 981178 A GB981178 A GB 981178A GB 3690761 A GB3690761 A GB 3690761A GB 3690761 A GB3690761 A GB 3690761A GB 981178 A GB981178 A GB 981178A
Authority
GB
United Kingdom
Prior art keywords
engine
operating time
temperature
operating life
consumption
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
GB3690761A
Inventor
John Stinson Howell
David Virgil Orr
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.)
Howell Instruments Inc
Original Assignee
Howell Instruments Inc
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 Howell Instruments Inc filed Critical Howell Instruments Inc
Priority to GB3690761A priority Critical patent/GB981178A/en
Publication of GB981178A publication Critical patent/GB981178A/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

Abstract

981,178. Indicating-apparatus. HOWELL INSTRUMENTS Inc. Oct. 13, 1961, No. 36907/61. Heading G1J. A system for indicating the elapsed equivalent operating time of a turbine engine, i.e. the elapsed operating time weighted to reflect the effect on the operating life due to temperature variation of the engine, comprises a circuit integrating with respect to time signals which are function of engine temperature and rate of consumption of maximum operating life of the engine. A servomotor feeds signals derived from engine thermocouples or resistance thermometers to a potentiometer whose resistance curve is a function of the rate of consumption of maximum operating life of the engine with respect to temperature. The integration may be effected by a motor having a speed control circuit associated with a tachometer, a difference detector, a feedback amplifier and a counter. Specification 833,347 is referred to.
GB3690761A 1961-10-13 1961-10-13 Improvements in or relating to equivalent operating time apparatus Expired GB981178A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3690761A GB981178A (en) 1961-10-13 1961-10-13 Improvements in or relating to equivalent operating time apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3690761A GB981178A (en) 1961-10-13 1961-10-13 Improvements in or relating to equivalent operating time apparatus

Publications (1)

Publication Number Publication Date
GB981178A true GB981178A (en) 1965-01-20

Family

ID=10392133

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3690761A Expired GB981178A (en) 1961-10-13 1961-10-13 Improvements in or relating to equivalent operating time apparatus

Country Status (1)

Country Link
GB (1) GB981178A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991006838A2 (en) * 1989-11-02 1991-05-16 Badische Tabakmanufaktur Roth-Händle Gmbh Electrical expiry indicator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991006838A2 (en) * 1989-11-02 1991-05-16 Badische Tabakmanufaktur Roth-Händle Gmbh Electrical expiry indicator
WO1991006838A3 (en) * 1989-11-02 1991-07-25 Badische Tabakmanufaktur Electrical expiry indicator

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