GB1003075A - Improvements in or relating to fire detection and alarm apparatus - Google Patents

Improvements in or relating to fire detection and alarm apparatus

Info

Publication number
GB1003075A
GB1003075A GB1459963A GB1459963A GB1003075A GB 1003075 A GB1003075 A GB 1003075A GB 1459963 A GB1459963 A GB 1459963A GB 1459963 A GB1459963 A GB 1459963A GB 1003075 A GB1003075 A GB 1003075A
Authority
GB
United Kingdom
Prior art keywords
fire
scanner
alarm
rotation
detector
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
GB1459963A
Inventor
David Shaw Taylor
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.)
THRING S ADVANCED DEVELOPMENTS
Original Assignee
THRING S ADVANCED DEVELOPMENTS
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 THRING S ADVANCED DEVELOPMENTS filed Critical THRING S ADVANCED DEVELOPMENTS
Priority to GB1459963A priority Critical patent/GB1003075A/en
Publication of GB1003075A publication Critical patent/GB1003075A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00Fire alarms; Alarms responsive to explosion
    • G08B17/12Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions

Landscapes

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

Abstract

1,003,075. Radiation sensitive fire alarms. THRING'S ADVANCED DEVELOPMENTS Ltd. April 9, 1964 [April 11,1963], No.14599/63. Heading GIA A fire alarm includes a detector 17 with a filter 18 capable of giving an electrical output in response to radiation in the 2-7 micron region and a rotary scanner serving to direct on to the detector in sequence radiation from sections of the space to be protected. As shown the scanner consists of a curved mirror strip 12 mounted on a drive shaft 10 for rotation, either directly or through gearing, by a motor 5. Thin ribs 15 position, the detector and also support a thin infra-redtransparent protective globe 19. Opaque material may be stuck on the globe to prevent operation of the alarm by, for example, a fixed electric fire. Provision may also be made to exclude direct sunlight and the globe may be opaque to visible light. It is contemplated that one or more units should be mounted overhead to cover the required space, the rate of scanning being between 1 and 10 revolutions a second. If a fire breaks out the output of any unit viewing the fire will include pulses at the rotation frequency which can be used to initiate operation of an audible and/or visual alarm. Each unit may include means producing low amplitude pulses at each rotation, and pulses being used to indicate correct rotation of the scanner. To prevent a uniform but dangerous rise of temperature in the space protected fairly to give an alarm it is proposed to fit a blanking element covering a small arc and driven at a different speed of revolution to the scanner so that the position of the blind spot varies.
GB1459963A 1963-04-11 1963-04-11 Improvements in or relating to fire detection and alarm apparatus Expired GB1003075A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1459963A GB1003075A (en) 1963-04-11 1963-04-11 Improvements in or relating to fire detection and alarm apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1459963A GB1003075A (en) 1963-04-11 1963-04-11 Improvements in or relating to fire detection and alarm apparatus

Publications (1)

Publication Number Publication Date
GB1003075A true GB1003075A (en) 1965-09-02

Family

ID=10044143

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1459963A Expired GB1003075A (en) 1963-04-11 1963-04-11 Improvements in or relating to fire detection and alarm apparatus

Country Status (1)

Country Link
GB (1) GB1003075A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2171513A (en) * 1985-02-19 1986-08-28 Atomic Energy Authority Uk A safety system for a laser-beam utilising facility
EP0311148A2 (en) * 1985-02-19 1989-04-12 United Kingdom Atomic Energy Authority Apparatus for monitoring infra-red emissions

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2171513A (en) * 1985-02-19 1986-08-28 Atomic Energy Authority Uk A safety system for a laser-beam utilising facility
GB2203539A (en) * 1985-02-19 1988-10-19 Atomic Energy Authority Uk Apparatus for monitoring infra-red emissions
EP0311148A2 (en) * 1985-02-19 1989-04-12 United Kingdom Atomic Energy Authority Apparatus for monitoring infra-red emissions
EP0311148A3 (en) * 1985-02-19 1989-05-10 United Kingdom Atomic Energy Authority Apparatus for monitoring infra-red emissions
GB2203539B (en) * 1985-02-19 1989-08-31 Atomic Energy Authority Uk Apparatus for monitoring infra-red emissions
GB2171513B (en) * 1985-02-19 1989-08-31 Atomic Energy Authority Uk Safety system for laser-utilising facilities

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