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ES391503A1 - Heat detector - Google Patents

Heat detector

Info

Publication number
ES391503A1
ES391503A1 ES391503A ES391503A ES391503A1 ES 391503 A1 ES391503 A1 ES 391503A1 ES 391503 A ES391503 A ES 391503A ES 391503 A ES391503 A ES 391503A ES 391503 A1 ES391503 A1 ES 391503A1
Authority
ES
Spain
Prior art keywords
temperature
point
bridge
variation
circuit
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
ES391503A
Other languages
Spanish (es)
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.)
Preussag AG Feuerschutz
Original Assignee
Preussag AG Feuerschutz
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 Preussag AG Feuerschutz filed Critical Preussag AG Feuerschutz
Publication of ES391503A1 publication Critical patent/ES391503A1/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

Circuit for detecting a temperature variation, especially for fire warning systems, in which, depending on the two branches of a bridged electrical connection, one of whose diagonals is connected to a voltage source, elements dependent on the temperature with different properties of excitation as a function of time that, with a previously determined variation in temperature as a function of time, produce an imbalance in the bridge, which is detected by means of an excitation element on the other diagonal of the bridge, characterized by the fact that a temperature-dependent voltage divider (R5, R6) is provided and connected to the voltage source, whose central point (A) is connected in such a way to a point (B) of the bridging circuit, that when a previously established absolute temperature variation occurs, the potential at point (A), corresponding to this variation, is applied to point (B) of the bridge circuit. (Machine-translation by Google Translate, not legally binding)
ES391503A 1970-06-04 1971-05-24 Heat detector Expired ES391503A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702027545 DE2027545B2 (en) 1970-06-04 1970-06-04 CIRCUIT ARRANGEMENT FOR DETECTING A CHANGE IN TEMPERATURE

Publications (1)

Publication Number Publication Date
ES391503A1 true ES391503A1 (en) 1974-08-01

Family

ID=5773065

Family Applications (1)

Application Number Title Priority Date Filing Date
ES391503A Expired ES391503A1 (en) 1970-06-04 1971-05-24 Heat detector

Country Status (6)

Country Link
AT (1) AT313755B (en)
BE (1) BE768048A (en)
DE (1) DE2027545B2 (en)
ES (1) ES391503A1 (en)
FR (1) FR2099748A5 (en)
GB (1) GB1349304A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2627357C3 (en) * 1976-06-18 1981-05-27 Preussag Ag Feuerschutz, 2060 Bad Oldesloe Temperature detector
DE2933874C2 (en) * 1978-08-24 1986-07-17 Hochiki Corp., Tokio/Tokyo Sensing device for sensing temperature differences between two points
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
DE4009011A1 (en) * 1990-03-21 1991-10-24 Trippe Industrieelectronic Gmb Temp. sensor using resistance bridge circuit - having terminal of measuring diagonal connected to input of differential amplifier
FR3083307B1 (en) * 2018-06-29 2021-09-24 Sc2N Sa TEMPERATURE SENSOR

Also Published As

Publication number Publication date
BE768048A (en) 1971-12-03
DE2027545A1 (en) 1971-12-09
DE2027545B2 (en) 1972-11-23
FR2099748A5 (en) 1972-03-17
AT313755B (en) 1974-03-11
GB1349304A (en) 1974-04-03

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