CA1115860A - Smoke detectors - Google Patents

Smoke detectors

Info

Publication number
CA1115860A
CA1115860A CA316,184A CA316184A CA1115860A CA 1115860 A CA1115860 A CA 1115860A CA 316184 A CA316184 A CA 316184A CA 1115860 A CA1115860 A CA 1115860A
Authority
CA
Canada
Prior art keywords
electrode
detector
collector electrode
smoke
collector
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
CA316,184A
Other languages
English (en)
French (fr)
Inventor
Dennis W.S. Smout
Jack Bryant
John H. Howes
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.)
GE Healthcare Ltd
Original Assignee
Radiochemical Centre 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 Radiochemical Centre Ltd filed Critical Radiochemical Centre Ltd
Application granted granted Critical
Publication of CA1115860A publication Critical patent/CA1115860A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL 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)
CA316,184A 1977-11-18 1978-11-14 Smoke detectors Expired CA1115860A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB4815477 1977-11-18
GB48154/77 1977-11-18
GB32913/78 1978-08-10
GB7832913 1978-08-10

Publications (1)

Publication Number Publication Date
CA1115860A true CA1115860A (en) 1982-01-05

Family

ID=26266218

Family Applications (1)

Application Number Title Priority Date Filing Date
CA316,184A Expired CA1115860A (en) 1977-11-18 1978-11-14 Smoke detectors

Country Status (3)

Country Link
US (1) US4361763A (oth)
JP (1) JPS5494094A (oth)
CA (1) CA1115860A (oth)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58186463U (ja) * 1982-06-07 1983-12-10 能美防災株式会社 イオン化式煙感知器
US4937562A (en) * 1987-12-26 1990-06-26 Hochiki Corp. Moisture-proof ionization smoke detector
JPH0263207A (ja) * 1988-08-30 1990-03-02 Fujitsu Ltd 静磁波デバイス
JPH02307198A (ja) * 1989-05-22 1990-12-20 Hochiki Corp イオン化式煙感知器
US6151189A (en) * 1998-12-28 2000-11-21 Western Digital Corporation Disk drive spindle motor with embedded ionizing source for static charge dissipation
US6953936B2 (en) * 2002-06-27 2005-10-11 Honeywell International, Inc. Ionization type smoke sensing chamber
US8004782B1 (en) 2009-03-19 2011-08-23 Western Digital Technologies, Inc. Tester with virtual ground
US11385212B2 (en) * 2020-09-25 2022-07-12 Honeywell International Inc. Smoke detection sample point

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4012729A (en) * 1975-06-19 1977-03-15 Statitrol Corporation Multi-element ionization chamber
US4150373A (en) * 1977-01-27 1979-04-17 Ried Jr Louis Ionization particle detector
US4286160A (en) * 1977-01-27 1981-08-25 Ried Jr Louis Ionization particle detector
US4185197A (en) * 1978-01-13 1980-01-22 General Electric Company Arrangement for inhibiting the effect of extraneous electric fields on an improved ionization smoke detector

Also Published As

Publication number Publication date
JPS622267B2 (oth) 1987-01-19
JPS5494094A (en) 1979-07-25
US4361763A (en) 1982-11-30

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Legal Events

Date Code Title Description
MKEX Expiry