FR2430048A1 - Hydraulic fire detector for explosive areas - uses cylinder contg. piston and connected at one side to fluid reservoir with float - Google Patents

Hydraulic fire detector for explosive areas - uses cylinder contg. piston and connected at one side to fluid reservoir with float

Info

Publication number
FR2430048A1
FR2430048A1 FR7819570A FR7819570A FR2430048A1 FR 2430048 A1 FR2430048 A1 FR 2430048A1 FR 7819570 A FR7819570 A FR 7819570A FR 7819570 A FR7819570 A FR 7819570A FR 2430048 A1 FR2430048 A1 FR 2430048A1
Authority
FR
France
Prior art keywords
piston
float
fluid reservoir
fire detector
cylinder
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.)
Withdrawn
Application number
FR7819570A
Other languages
French (fr)
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.)
COFFIN PIERRE
Original Assignee
COFFIN PIERRE
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 COFFIN PIERRE filed Critical COFFIN PIERRE
Priority to FR7819570A priority Critical patent/FR2430048A1/en
Publication of FR2430048A1 publication Critical patent/FR2430048A1/en
Withdrawn legal-status Critical Current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

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • General Physics & Mathematics (AREA)
  • Safety Valves (AREA)
  • Level Indicators Using A Float (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

The fire detector has a hydraulic cylinder (2) containing a sliding piston (4) and connected at one side to a fluid reservoir (1) with a float. The opposite end of the cylinder (2) is connected to a conduit (6) with a number of buttons along its length, each of an alloy which melts at a relatively low temp. In the normal state both sides of the piston (4) are acted on by the same pressure, but when a leak occurs in the conduit (6), due to one or more of the buttons melting, the piston (4) is pushed along the cylinder (2), causing the liquid level in the reservoir (1) and hence the float to drop. Pref. a small dia. passage (5) is provided through the piston (4), allowing communication between the two sides of the cylinder.
FR7819570A 1978-06-30 1978-06-30 Hydraulic fire detector for explosive areas - uses cylinder contg. piston and connected at one side to fluid reservoir with float Withdrawn FR2430048A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7819570A FR2430048A1 (en) 1978-06-30 1978-06-30 Hydraulic fire detector for explosive areas - uses cylinder contg. piston and connected at one side to fluid reservoir with float

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7819570A FR2430048A1 (en) 1978-06-30 1978-06-30 Hydraulic fire detector for explosive areas - uses cylinder contg. piston and connected at one side to fluid reservoir with float

Publications (1)

Publication Number Publication Date
FR2430048A1 true FR2430048A1 (en) 1980-01-25

Family

ID=9210167

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7819570A Withdrawn FR2430048A1 (en) 1978-06-30 1978-06-30 Hydraulic fire detector for explosive areas - uses cylinder contg. piston and connected at one side to fluid reservoir with float

Country Status (1)

Country Link
FR (1) FR2430048A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103861225A (en) * 2014-02-18 2014-06-18 浙江海洋学院 Connectable fire-fighting truck

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103861225A (en) * 2014-02-18 2014-06-18 浙江海洋学院 Connectable fire-fighting truck

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Legal Events

Date Code Title Description
ST Notification of lapse