GB1164792A - Improvements in or relating to Temperature Sensing Circuits - Google Patents

Improvements in or relating to Temperature Sensing Circuits

Info

Publication number
GB1164792A
GB1164792A GB594366A GB594366A GB1164792A GB 1164792 A GB1164792 A GB 1164792A GB 594366 A GB594366 A GB 594366A GB 594366 A GB594366 A GB 594366A GB 1164792 A GB1164792 A GB 1164792A
Authority
GB
United Kingdom
Prior art keywords
temperature
thermistor
transistors
trigger
unijunction transistor
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
GB594366A
Inventor
Cyril George Williams
David Sydney Morgan
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.)
MUIRHEAD Ltd FORMERLY KNOWN AS
Original Assignee
MUIRHEAD Ltd FORMERLY KNOWN AS
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 MUIRHEAD Ltd FORMERLY KNOWN AS filed Critical MUIRHEAD Ltd FORMERLY KNOWN AS
Priority to GB594366A priority Critical patent/GB1164792A/en
Priority to SE176667A priority patent/SE308828B/xx
Publication of GB1164792A publication Critical patent/GB1164792A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/35—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar semiconductor devices with more than two PN junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region
    • H03K3/351—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar semiconductor devices with more than two PN junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region the devices being unijunction transistors
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/18—Modifications for indicating state of switch
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
    • H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • H03K3/284—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator monostable

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electronic Switches (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

1,164,792. Temperature alarms. MUIRHEAD Ltd. 13 Jan., 1967 [10 Feb., 1966], No. 5943/66. Heading G4N. A temperature sensing circuit comprises the series arrangement of a temperature-sensitive resistor T and a temperature-insensitive resistor R5 across the output of a pulse generator, the junction between the resistors being connected to the emitter of a unijunction transistor Uj. The mark/space ratio of pulses (preferably from a multivibrator Trl, Tr2) is such that the pulses cause negligible heating of the thermistor T. At temperatures such that thermistor T has low resistance, capacitor C3 does not charge sufficiently to trigger the unijunction transistor Uj, but a sufficiently large change in temperature will cause sufficient increase in the resistance of thermistor T to trigger unijunction transistor Uj so as to trigger a monostable multivibrator comprising transistors Tr3, Tr4, the parameters of which being such that lamp L will flash. In Fig. 2 (not shown) transistors Tr3, Tr4 are replaced by a super-alpha pair of transistors so as to provide a similar performance.
GB594366A 1966-02-10 1966-02-10 Improvements in or relating to Temperature Sensing Circuits Expired GB1164792A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB594366A GB1164792A (en) 1966-02-10 1966-02-10 Improvements in or relating to Temperature Sensing Circuits
SE176667A SE308828B (en) 1966-02-10 1967-02-08

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB594366A GB1164792A (en) 1966-02-10 1966-02-10 Improvements in or relating to Temperature Sensing Circuits

Publications (1)

Publication Number Publication Date
GB1164792A true GB1164792A (en) 1969-09-24

Family

ID=9805530

Family Applications (1)

Application Number Title Priority Date Filing Date
GB594366A Expired GB1164792A (en) 1966-02-10 1966-02-10 Improvements in or relating to Temperature Sensing Circuits

Country Status (2)

Country Link
GB (1) GB1164792A (en)
SE (1) SE308828B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110945330A (en) * 2017-08-15 2020-03-31 罗伯特·博世有限公司 Temperature sensor circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110945330A (en) * 2017-08-15 2020-03-31 罗伯特·博世有限公司 Temperature sensor circuit
US11391632B2 (en) 2017-08-15 2022-07-19 Robert Bosch Gmbh Temperature sensor circuit

Also Published As

Publication number Publication date
SE308828B (en) 1969-02-24

Similar Documents

Publication Publication Date Title
CH473982A (en) Turbofan engine with additional burner
CH508991A (en) High temperature fuel element
DK108413C (en) Temperature sensitive organ with a sliding piston.
GB1164792A (en) Improvements in or relating to Temperature Sensing Circuits
DK106043C (en) Circuits for stabilizing the operating point of several transistors against variations in temperature and supply voltage by means of a temperature-dependent element.
AT256965B (en) Bimetal element with radiator
GB1205461A (en) Thermal stabilizer for thermally sensitive components
JPS54161381A (en) Temperature detector
SU434584A1 (en) WAITING MULTI-VIBRATOR
GB1309254A (en) Soldering instruments
ES377685A1 (en) Heating control circuit with scr-unijunction transistor combination
GB953526A (en) Improvements in or relating to electronic timing circuit arrangements
SU494755A1 (en) Device for signaling and emergency shutdown of an object when the specified temperature is exceeded
SU429511A1 (en)
FR1520211A (en) Temperature regulator
SU455289A1 (en) Millivoltmeter single pulse
BERTOYA Description of a simple transistorized automatic-gain-control circuit which uses a thermistor as the control element
SYCHEV Some problems in critical-point thermodynamics. i- the value of/the second partial derivative of p with respect to t and v/ and the possibility of expanding thermodynamic functions in taylor series close to a critical point(Thermodynamic theory of critical point of pure substances expanding functions into Taylor series)
ES362611A1 (en) Heat-sensing system
GB1226244A (en)
DK117527B (en) Temperature sensitive control valve.
FR2288279A1 (en) Thermostatic control system - has diode as temp. sensor with negative or positive coefficient platinum resistive element
GB1144574A (en) Control circuits of starting aids for internal combustion engines
FR1473980A (en) Temperature control device
FR1451592A (en) Thermoplastic compositions whose color is stable to heat

Legal Events

Date Code Title Description
PS Patent sealed