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FR2298145A1 - Positive gradient temp. time response fire detectors - has several detector chambers each with non-return valve bypassed by capillary tube - Google Patents

Positive gradient temp. time response fire detectors - has several detector chambers each with non-return valve bypassed by capillary tube

Info

Publication number
FR2298145A1
FR2298145A1 FR7501584A FR7501584A FR2298145A1 FR 2298145 A1 FR2298145 A1 FR 2298145A1 FR 7501584 A FR7501584 A FR 7501584A FR 7501584 A FR7501584 A FR 7501584A FR 2298145 A1 FR2298145 A1 FR 2298145A1
Authority
FR
France
Prior art keywords
capillary tube
return valve
chambers
time response
membrane
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.)
Granted
Application number
FR7501584A
Other languages
French (fr)
Other versions
FR2298145B3 (en
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.)
KAPA SA
Original Assignee
KAPA SA
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 KAPA SA filed Critical KAPA SA
Priority to FR7501584A priority Critical patent/FR2298145A1/en
Publication of FR2298145A1 publication Critical patent/FR2298145A1/en
Application granted granted Critical
Publication of FR2298145B3 publication Critical patent/FR2298145B3/fr
Granted 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
    • G08B17/04—Hydraulic or pneumatic actuation of the alarm, e.g. by change of fluid pressure
    • 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
    • G01K3/12—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 based upon expansion or contraction of materials

Landscapes

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

Abstract

The pipework on which are connected the aerothermal chambers (1) and the fusible capsules (2) is connected directly to the fixed face of an arenoid manometer membrane (6) and indirectly to the fixed face of a second membrane (9) identical to the first. The interconnection to this second membrane is by a pipe (3) having a calibrated diaphragm (7) and by a chamber (8) enclosing air maintained at a constant determined pressure. This chamber (8) has a volume which is several times larger than that of the network comprising the pipework and aerothermal chambers. The two membranes are coaxial and their movable fuses are connected by a mechanical element (13) whose longitudinal movement on the common axis of the two membranes translate by their speed of movement and the amplitude of this movement, the existence of a sudden temperature variation with time.
FR7501584A 1975-01-20 1975-01-20 Positive gradient temp. time response fire detectors - has several detector chambers each with non-return valve bypassed by capillary tube Granted FR2298145A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7501584A FR2298145A1 (en) 1975-01-20 1975-01-20 Positive gradient temp. time response fire detectors - has several detector chambers each with non-return valve bypassed by capillary tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7501584A FR2298145A1 (en) 1975-01-20 1975-01-20 Positive gradient temp. time response fire detectors - has several detector chambers each with non-return valve bypassed by capillary tube

Publications (2)

Publication Number Publication Date
FR2298145A1 true FR2298145A1 (en) 1976-08-13
FR2298145B3 FR2298145B3 (en) 1977-10-14

Family

ID=9150022

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7501584A Granted FR2298145A1 (en) 1975-01-20 1975-01-20 Positive gradient temp. time response fire detectors - has several detector chambers each with non-return valve bypassed by capillary tube

Country Status (1)

Country Link
FR (1) FR2298145A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1016101A3 (en) * 2004-06-28 2006-03-07 L Air Liquide Belge Device and method for detection of change of temperature, in particular for leak detection of liquid cryogenic.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1016101A3 (en) * 2004-06-28 2006-03-07 L Air Liquide Belge Device and method for detection of change of temperature, in particular for leak detection of liquid cryogenic.

Also Published As

Publication number Publication date
FR2298145B3 (en) 1977-10-14

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Legal Events

Date Code Title Description
ST Notification of lapse