GB1507268A - Thermal detector devices - Google Patents

Thermal detector devices

Info

Publication number
GB1507268A
GB1507268A GB3331176A GB3331176A GB1507268A GB 1507268 A GB1507268 A GB 1507268A GB 3331176 A GB3331176 A GB 3331176A GB 3331176 A GB3331176 A GB 3331176A GB 1507268 A GB1507268 A GB 1507268A
Authority
GB
United Kingdom
Prior art keywords
signal
chip
housing
alarm
temp
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
GB3331176A
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.)
Wormald International Ltd
Original Assignee
Wormald International 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 Wormald International Ltd filed Critical Wormald International Ltd
Publication of GB1507268A publication Critical patent/GB1507268A/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
    • G01K3/08—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values
    • G01K3/10—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values in respect of time, e.g. reacting only to a quick change of temperature
    • 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
    • G01K3/005—Circuits arrangements for indicating a predetermined temperature
    • 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
    • G01K7/01—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using semiconducting elements having PN junctions
    • 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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Nonlinear Science (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

1507268 Temperature alarms WORMALD INTERNATIONAL Ltd 10 Aug 1976 [11 Aug 1975] 33311/76 Heading G4N A temperature alarm comprises a housing 13, 15, 17 having a heat conductive portion 13, and an electrical integrated circuit chip 14 within the housing and in heat transfer relationship with the portion 15, the chip 14 incorporating a thermally responsive semi-conductor element for deriving a temperature dependent analogue signal and means for processing said signal to provide an alarm signal both when said signal exceeds a predetermined value or when said signal increases in value at a rate in excess of a predetermined rate. As shown in Fig. 3, the housing has two heat resistant portions 15 and 17 respectively enclosing the legs 16 of the chip 14 and a circuit board 18 which mounts any components external of the chip, e.g. adjusting resistors. The circuitry shown in Fig. 2 consists of a voltage regulator 10, an amplifier 5 which incorporates the semiconductor element 4, e.g. a transistor or a diode and which provides the analogue signal V temp , a comparator 7 which compares the signal V temp with a reference signal and the output signal of a R-C differentiating circuit 8 with another reference signal, and an SCR switch 9 which is triggered by the output of the comparator 7 to reduce the impedance across supply lines 3 and thus signal an alarm condition. An adjustment unit 12, e.g. a resistor is provided for biasing the amplifier 5, and a safeguard device 11, e.g. a diode, is provided to ensure correct connection of the applied voltage.
GB3331176A 1975-08-11 1976-08-10 Thermal detector devices Expired GB1507268A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AUPC272175 1975-08-11

Publications (1)

Publication Number Publication Date
GB1507268A true GB1507268A (en) 1978-04-12

Family

ID=3766316

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3331176A Expired GB1507268A (en) 1975-08-11 1976-08-10 Thermal detector devices

Country Status (6)

Country Link
JP (1) JPS5222976A (en)
CH (1) CH607179A5 (en)
DE (1) DE2635640A1 (en)
FR (1) FR2321117A1 (en)
GB (1) GB1507268A (en)
NZ (1) NZ181746A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2215502A (en) * 1988-02-02 1989-09-20 Nittan Co Ltd A fire detector having a protective cover
EP2039903A3 (en) * 2007-09-22 2013-01-23 ZF Friedrichshafen AG Method for determining the output of a cooling system
WO2013088057A1 (en) * 2011-12-15 2013-06-20 Valeo Systemes De Controle Moteur Temperature measurement method
WO2015175909A1 (en) * 2014-05-15 2015-11-19 Microchip Technology Incorporated Determining rate of change in temperature measurements

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2933874C2 (en) * 1978-08-24 1986-07-17 Hochiki Corp., Tokio/Tokyo Sensing device for sensing temperature differences between two points
JPS5717810A (en) * 1980-07-07 1982-01-29 Nippon Denso Co Ltd Alarm method and device for vehicle
DE3328450A1 (en) * 1983-08-06 1985-02-28 Daimler-Benz Ag, 7000 Stuttgart METHOD FOR CHECKING PROBE
JPS61112489U (en) * 1984-12-24 1986-07-16
JPS62247499A (en) * 1986-11-25 1987-10-28 松下電工株式会社 Heat sensor
JP2650998B2 (en) * 1989-01-07 1997-09-10 古河電気工業株式会社 Optical fiber for detecting liquid, gas, etc.
DE3922234A1 (en) * 1989-07-06 1991-01-10 Kloeckner Becorit Gmbh Temp. monitor esp. for combustion engine cooling system - switches off engine depending on temp. w.r.t. threshold comparison and temp. gradient against time
DE4235113A1 (en) * 1992-10-17 1994-04-21 Bayerische Motoren Werke Ag Method for diagnosing the components of a heating circuit for an electrically conductive body
DE10020380A1 (en) 2000-04-26 2001-10-31 Bodenseewerk Geraetetech Method and device for early detection of a possible overheating of an object

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1191363A (en) * 1968-02-19 1970-05-13 Pavelle Ltd Improvements in or relating to Electronic Thermostats.
US3701985A (en) * 1971-04-05 1972-10-31 John S Davies Fire detection system and unit
BE791365A (en) * 1971-11-15 1973-03-01 Guilleux Robert TEMPERATURE VARIATIONS DETECTION DEVICE
JPS5727109Y2 (en) * 1974-07-20 1982-06-12

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2215502A (en) * 1988-02-02 1989-09-20 Nittan Co Ltd A fire detector having a protective cover
US4929093A (en) * 1988-02-02 1990-05-29 Nittan Company Fire detector having a protective cover
GB2215502B (en) * 1988-02-02 1992-10-21 Nittan Co Ltd A fire detector having a protective cover
EP2039903A3 (en) * 2007-09-22 2013-01-23 ZF Friedrichshafen AG Method for determining the output of a cooling system
CN104114986A (en) * 2011-12-15 2014-10-22 法雷奥电机控制系统公司 Temperature measurement method
FR2984495A1 (en) * 2011-12-15 2013-06-21 Valeo Sys Controle Moteur Sas METHOD FOR MEASURING TEMPERATURE
WO2013088057A1 (en) * 2011-12-15 2013-06-20 Valeo Systemes De Controle Moteur Temperature measurement method
US10240987B2 (en) 2011-12-15 2019-03-26 Valeo Systemes De Controle Moteur Temperature measurement method
CN104114986B (en) * 2011-12-15 2019-11-12 法雷奥西门子新能源汽车法国股份公司 Thermometry
WO2015175909A1 (en) * 2014-05-15 2015-11-19 Microchip Technology Incorporated Determining rate of change in temperature measurements
CN106415223A (en) * 2014-05-15 2017-02-15 密克罗奇普技术公司 Determining rate of change in temperature measurements
TWI658257B (en) * 2014-05-15 2019-05-01 美商微晶片科技公司 Determining rate of change in temperature measurements
US10302502B2 (en) 2014-05-15 2019-05-28 Microchip Technology Incorporated Determining rate of change in temperature measurements
CN106415223B (en) * 2014-05-15 2019-12-20 密克罗奇普技术公司 Determining the rate of change in temperature measurement

Also Published As

Publication number Publication date
FR2321117B1 (en) 1981-08-28
FR2321117A1 (en) 1977-03-11
CH607179A5 (en) 1978-11-30
JPS5222976A (en) 1977-02-21
NZ181746A (en) 1979-11-01
DE2635640A1 (en) 1977-03-03

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Legal Events

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