GB2249427B - Ionization smoke detector - Google Patents

Ionization smoke detector

Info

Publication number
GB2249427B
GB2249427B GB9125000A GB9125000A GB2249427B GB 2249427 B GB2249427 B GB 2249427B GB 9125000 A GB9125000 A GB 9125000A GB 9125000 A GB9125000 A GB 9125000A GB 2249427 B GB2249427 B GB 2249427B
Authority
GB
United Kingdom
Prior art keywords
smoke detector
ionization smoke
ionization
detector
smoke
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 - Lifetime
Application number
GB9125000A
Other versions
GB2249427A (en
GB9125000D0 (en
Inventor
Yoshinori Kaminaka
Hiroshi Yashima
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.)
Hochiki Corp
Original Assignee
Hochiki Corp
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
Priority claimed from JP33054587A external-priority patent/JPH01171099A/en
Priority claimed from JP1988010896U external-priority patent/JP2504836Y2/en
Priority claimed from GB8829900A external-priority patent/GB2212656B/en
Application filed by Hochiki Corp filed Critical Hochiki Corp
Publication of GB9125000D0 publication Critical patent/GB9125000D0/en
Publication of GB2249427A publication Critical patent/GB2249427A/en
Application granted granted Critical
Publication of GB2249427B publication Critical patent/GB2249427B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J47/00—Tubes for determining the presence, intensity, density or energy of radiation or particles
    • H01J47/02—Ionisation chambers
    • 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)
GB9125000A 1987-12-26 1991-11-25 Ionization smoke detector Expired - Lifetime GB2249427B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP33054587A JPH01171099A (en) 1987-12-26 1987-12-26 Moisture-proof structure for ionization type smoke sensor
JP1988010896U JP2504836Y2 (en) 1988-01-29 1988-01-29 Ionized smoke detector intermediate electrode mounting structure
GB8829900A GB2212656B (en) 1987-12-26 1988-12-22 Ionization smoke detector

Publications (3)

Publication Number Publication Date
GB9125000D0 GB9125000D0 (en) 1992-01-22
GB2249427A GB2249427A (en) 1992-05-06
GB2249427B true GB2249427B (en) 1992-08-12

Family

ID=27264247

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9125000A Expired - Lifetime GB2249427B (en) 1987-12-26 1991-11-25 Ionization smoke detector

Country Status (1)

Country Link
GB (1) GB2249427B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201219488D0 (en) 2012-10-30 2012-12-12 Univ Sussex Apparatus for sensing ionic current and ionising radiation

Also Published As

Publication number Publication date
GB2249427A (en) 1992-05-06
GB9125000D0 (en) 1992-01-22

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Legal Events

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

Effective date: 20071222