GB1406891A - Detectors - Google Patents

Detectors

Info

Publication number
GB1406891A
GB1406891A GB5795772A GB5795772A GB1406891A GB 1406891 A GB1406891 A GB 1406891A GB 5795772 A GB5795772 A GB 5795772A GB 5795772 A GB5795772 A GB 5795772A GB 1406891 A GB1406891 A GB 1406891A
Authority
GB
United Kingdom
Prior art keywords
tip
arms
dec
arm
alarm
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
GB5795772A
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.)
Mather and Platt Ltd
Original Assignee
Mather and Platt Ltd
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 Mather and Platt Ltd filed Critical Mather and Platt Ltd
Priority to GB5795772A priority Critical patent/GB1406891A/en
Publication of GB1406891A publication Critical patent/GB1406891A/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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
    • G08B17/113—Constructional details

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

1406891 Monitoring impacts MATHER & PLATT Ltd 14 Dec 1973 [15 Dec 1972] 57957/72 Headings G1N and G1W A detector element is formed with a conductive path which is broken when subjected to a predetermined impact strength. A cylindrical plastics member 4 is connected by three arms 3 to a central tip 1, comprising a temperature sensitive transducer, in an annular member 2. Each arm has a sharp-cornered notch 8. The inner surface of the cylinder 4 and the arms 3 are provided with a conductive coating 9 which is joined at the tip to a wire 10. The cylindrical member 4 is fixed by a flange 5, and a force of a predetermined magnitude when supplied to the tip 1 causes the arms 3 to break at the notches 8, thereby breaking the circuit from the coating 9 to the tip 1, and energizing an alarm. An alarm circuit could be provided for each arm 3.
GB5795772A 1972-12-15 1972-12-15 Detectors Expired GB1406891A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5795772A GB1406891A (en) 1972-12-15 1972-12-15 Detectors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5795772A GB1406891A (en) 1972-12-15 1972-12-15 Detectors

Publications (1)

Publication Number Publication Date
GB1406891A true GB1406891A (en) 1975-09-17

Family

ID=10480456

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5795772A Expired GB1406891A (en) 1972-12-15 1972-12-15 Detectors

Country Status (1)

Country Link
GB (1) GB1406891A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2446471A1 (en) * 1979-01-11 1980-08-08 Nissan Motor PRESSURE SENSOR

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2446471A1 (en) * 1979-01-11 1980-08-08 Nissan Motor PRESSURE SENSOR

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee