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GB1172354A - Improvements relating to Smoke Detectors - Google Patents

Improvements relating to Smoke Detectors

Info

Publication number
GB1172354A
GB1172354A GB22530/69A GB2253069A GB1172354A GB 1172354 A GB1172354 A GB 1172354A GB 22530/69 A GB22530/69 A GB 22530/69A GB 2253069 A GB2253069 A GB 2253069A GB 1172354 A GB1172354 A GB 1172354A
Authority
GB
United Kingdom
Prior art keywords
smoke detectors
improvements relating
feb
temperature
light
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
GB22530/69A
Inventor
Edward William Lines
William Thomas Peberdy
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.)
Pyrene Co Ltd
Original Assignee
Pyrene Co 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 Pyrene Co Ltd filed Critical Pyrene Co Ltd
Priority to GB22530/69A priority Critical patent/GB1172354A/en
Publication of GB1172354A publication Critical patent/GB1172354A/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
    • 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
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
    • G08B17/107—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device for detecting light-scattering due to smoke
    • 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

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

1,172,354. Photo-electric smoke detectors. PYRENE CO. Ltd. Feb. 16, 1967 [Feb. 16, 1966], No. 22530/69. Divided out of 1,172,353. Heading G1A. The description is substantially identical to that of Specification 1,172, 353, but the main claim relates to the use of the thermistor T connected in series with the light source L, whereby the light output of the source varies with the temperature in such a manner as substantially to compensate for changes with temperature in the sensitivity of the light sensitive element RV.
GB22530/69A 1966-02-16 1966-02-16 Improvements relating to Smoke Detectors Expired GB1172354A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB22530/69A GB1172354A (en) 1966-02-16 1966-02-16 Improvements relating to Smoke Detectors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB22530/69A GB1172354A (en) 1966-02-16 1966-02-16 Improvements relating to Smoke Detectors

Publications (1)

Publication Number Publication Date
GB1172354A true GB1172354A (en) 1969-11-26

Family

ID=10180873

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22530/69A Expired GB1172354A (en) 1966-02-16 1966-02-16 Improvements relating to Smoke Detectors

Country Status (1)

Country Link
GB (1) GB1172354A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2409559A1 (en) * 1977-11-21 1979-06-15 Cerberus Ag SMOKE DETECTOR
US4249169A (en) * 1979-05-18 1981-02-03 Malinowski William J Optical smoke detector
EP0079011A1 (en) * 1981-11-11 1983-05-18 Cerberus Ag Smoke detector
GB2230853A (en) * 1989-03-23 1990-10-31 Nittan Co Ltd Photoelectric smoke sensor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2409559A1 (en) * 1977-11-21 1979-06-15 Cerberus Ag SMOKE DETECTOR
US4249169A (en) * 1979-05-18 1981-02-03 Malinowski William J Optical smoke detector
EP0079011A1 (en) * 1981-11-11 1983-05-18 Cerberus Ag Smoke detector
US4524281A (en) * 1981-11-11 1985-06-18 Cerberus Ag Optical smoke detector with sensitivity adjustment
GB2230853A (en) * 1989-03-23 1990-10-31 Nittan Co Ltd Photoelectric smoke sensor
GB2230853B (en) * 1989-03-23 1993-03-17 Nittan Co Ltd Photoelectric smoke sensor

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees