GB1322299A - Ionization smoke detector - Google Patents

Ionization smoke detector

Info

Publication number
GB1322299A
GB1322299A GB1914272A GB1914272A GB1322299A GB 1322299 A GB1322299 A GB 1322299A GB 1914272 A GB1914272 A GB 1914272A GB 1914272 A GB1914272 A GB 1914272A GB 1322299 A GB1322299 A GB 1322299A
Authority
GB
United Kingdom
Prior art keywords
electrode
detector
radioactive source
radioactive
supported
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
GB1914272A
Other languages
English (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.)
Nittan Co Ltd
Original Assignee
Nittan 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 Nittan Co Ltd filed Critical Nittan Co Ltd
Publication of GB1322299A publication Critical patent/GB1322299A/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)
  • Fire-Detection Mechanisms (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
GB1914272A 1971-05-13 1972-04-25 Ionization smoke detector Expired GB1322299A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3773971U JPS5537999Y2 (de) 1971-05-13 1971-05-13

Publications (1)

Publication Number Publication Date
GB1322299A true GB1322299A (en) 1973-07-04

Family

ID=12505844

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1914272A Expired GB1322299A (en) 1971-05-13 1972-04-25 Ionization smoke detector

Country Status (7)

Country Link
JP (1) JPS5537999Y2 (de)
AU (1) AU431572B2 (de)
CA (1) CA948333A (de)
CH (1) CH537067A (de)
DE (1) DE2223360C3 (de)
FR (1) FR2139246A5 (de)
GB (1) GB1322299A (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49117169A (de) * 1973-02-03 1974-11-08
JPS5531416Y2 (de) * 1975-01-28 1980-07-26
JPS5260766A (en) * 1975-11-11 1977-05-19 Sankyo Seisakushiyo Kk Piezooelectric element lighter

Also Published As

Publication number Publication date
AU431572B2 (en) 1973-01-25
JPS5537999Y2 (de) 1980-09-05
DE2223360B2 (de) 1973-07-12
CA948333A (en) 1974-05-28
DE2223360A1 (de) 1972-11-23
AU4105272A (en) 1973-01-25
FR2139246A5 (de) 1973-01-05
CH537067A (de) 1973-06-29
JPS4736292U (de) 1972-12-22
DE2223360C3 (de) 1974-02-07

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Legal Events

Date Code Title Description
414F Notice of opposition given (sect. 14/1949)
414A Case decided by the comptroller ** specification amended (sect. 14/1949)
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee