FR2239727A1 - Miniature fire detector - is connected to electrical alarm circuit and responds to local temperature rise - Google Patents

Miniature fire detector - is connected to electrical alarm circuit and responds to local temperature rise

Info

Publication number
FR2239727A1
FR2239727A1 FR7328321A FR7328321A FR2239727A1 FR 2239727 A1 FR2239727 A1 FR 2239727A1 FR 7328321 A FR7328321 A FR 7328321A FR 7328321 A FR7328321 A FR 7328321A FR 2239727 A1 FR2239727 A1 FR 2239727A1
Authority
FR
France
Prior art keywords
alarm circuit
responds
temperature rise
fire detector
local temperature
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
FR7328321A
Other languages
French (fr)
Other versions
FR2239727B1 (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.)
MACIAG JEAN
Original Assignee
MACIAG JEAN
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 MACIAG JEAN filed Critical MACIAG JEAN
Priority to FR7328321A priority Critical patent/FR2239727A1/en
Publication of FR2239727A1 publication Critical patent/FR2239727A1/en
Application granted granted Critical
Publication of FR2239727B1 publication Critical patent/FR2239727B1/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
    • G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch

Landscapes

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

Abstract

The detector body (1) has an aperture (2) with a blind bore (3) leading from the latter, the body (1) being of insulating material with two embedded conductor wires (4, 5) each of which is secured to a supply lead (6, 9) at one end and having a plate (7, 8) at the other end located in the blind bore (3) so that the plates (7, 8) face each other. The blind bore is filled with mercury (10) and the aperture (2) is filled with an organic compound (11) with a known fusion point, e.g. between 30 and 70 degrees centigrade. The organic compound is retained by ribs (12) around the wall of the aperture (2) and upon the fusion temperature being exceeded allows the mercury (10) to be released from the bore (3) so that the alarm circuit connected to the conductor wires (4, 5) is opened.
FR7328321A 1973-08-02 1973-08-02 Miniature fire detector - is connected to electrical alarm circuit and responds to local temperature rise Granted FR2239727A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7328321A FR2239727A1 (en) 1973-08-02 1973-08-02 Miniature fire detector - is connected to electrical alarm circuit and responds to local temperature rise

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7328321A FR2239727A1 (en) 1973-08-02 1973-08-02 Miniature fire detector - is connected to electrical alarm circuit and responds to local temperature rise

Publications (2)

Publication Number Publication Date
FR2239727A1 true FR2239727A1 (en) 1975-02-28
FR2239727B1 FR2239727B1 (en) 1977-05-13

Family

ID=9123513

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7328321A Granted FR2239727A1 (en) 1973-08-02 1973-08-02 Miniature fire detector - is connected to electrical alarm circuit and responds to local temperature rise

Country Status (1)

Country Link
FR (1) FR2239727A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5525186A (en) * 1990-08-20 1996-06-11 Denco, Inc. Wafer for use in the selective connecting and disconnecting of plastic tubes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5525186A (en) * 1990-08-20 1996-06-11 Denco, Inc. Wafer for use in the selective connecting and disconnecting of plastic tubes

Also Published As

Publication number Publication date
FR2239727B1 (en) 1977-05-13

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Legal Events

Date Code Title Description
ST Notification of lapse