GB1450819A - Ionization aerosol detection - Google Patents

Ionization aerosol detection

Info

Publication number
GB1450819A
GB1450819A GB288274A GB288274A GB1450819A GB 1450819 A GB1450819 A GB 1450819A GB 288274 A GB288274 A GB 288274A GB 288274 A GB288274 A GB 288274A GB 1450819 A GB1450819 A GB 1450819A
Authority
GB
United Kingdom
Prior art keywords
cup
electrode
ionization
ionization smoke
aerosol detection
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
GB288274A
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.)
Hamm J E
Jensen R S
Original Assignee
Hamm J E
Jensen R S
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 Hamm J E, Jensen R S filed Critical Hamm J E
Publication of GB1450819A publication Critical patent/GB1450819A/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
    • G08B17/11—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
    • 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)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

1450819 Ionization smoke detectors J E HAMM and R S JENSON 22 Jan 1974 [2 Feb 1973] 02882/74 Heading G1N In an ionization smoke detector the radiation source 46 is mounted centrally in a cup-shaped housing 48 to emit particles 45 towards a negatively biased electrode 44. The electrostatic field between the electrode and the positively charged housing, tends to focus the particle beam. Focusing may also be assisted by a cup round the source and an electromagnetic field. A circuit for controlling an SCR/buzzer alarm is illustrated in Figs. 4, 5, (not shown) and is substantially self explanatory.
GB288274A 1973-02-02 1974-01-22 Ionization aerosol detection Expired GB1450819A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US329285A US3913082A (en) 1973-02-02 1973-02-02 Ionization aerosol detector

Publications (1)

Publication Number Publication Date
GB1450819A true GB1450819A (en) 1976-09-29

Family

ID=23284702

Family Applications (1)

Application Number Title Priority Date Filing Date
GB288274A Expired GB1450819A (en) 1973-02-02 1974-01-22 Ionization aerosol detection

Country Status (4)

Country Link
US (1) US3913082A (en)
JP (1) JPS49107794A (en)
CA (1) CA1012261A (en)
GB (1) GB1450819A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091364A (en) * 1974-09-09 1978-05-23 Unitec, Inc. Combustion detection device
US4185196A (en) * 1978-01-13 1980-01-22 General Electric Company Ionization smoke detector having improved stability and sensitivity
US4213047A (en) * 1978-10-25 1980-07-15 General Signal Corporation Smoke detector having unipolar ionization chamber
US4401979A (en) * 1981-02-11 1983-08-30 General Signal Corporation Electrical controls for ionization smoke detector
US4513202A (en) * 1982-05-14 1985-04-23 Firetek Corporation Self compensating fire detection device
TW563010B (en) 2001-06-25 2003-11-21 Em Microelectronic Marin Sa High-voltage regulator including an external regulating device
EP1271440B1 (en) * 2001-06-25 2005-11-30 EM Microelectronic-Marin SA High-voltage regulator with external control
US10161905B2 (en) * 2017-05-19 2018-12-25 The Boeing Company Smoke detector having a magnet
US10593192B1 (en) 2018-11-19 2020-03-17 The Boeing Company Smoke detector having a magnet
CN111402540B (en) * 2020-02-25 2021-08-24 王勇强 Air-breathing smoke-sensing fire detection device, method and equipment

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU48167A1 (en) * 1965-03-11 1966-09-12 Applic Electroniques Ets
CH446131A (en) * 1966-02-22 1967-10-31 Cerberus Ag Ionization fire alarm system
US3673586A (en) * 1970-02-19 1972-06-27 Statitrol Corp Resistance controlled timed pulse generator

Also Published As

Publication number Publication date
JPS49107794A (en) 1974-10-14
CA1012261A (en) 1977-06-14
US3913082A (en) 1975-10-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee