GB1254839A - Improved ionization smoke detectors - Google Patents

Improved ionization smoke detectors

Info

Publication number
GB1254839A
GB1254839A GB27795/70A GB2779570A GB1254839A GB 1254839 A GB1254839 A GB 1254839A GB 27795/70 A GB27795/70 A GB 27795/70A GB 2779570 A GB2779570 A GB 2779570A GB 1254839 A GB1254839 A GB 1254839A
Authority
GB
United Kingdom
Prior art keywords
leakage current
ionization smoke
gate leakage
smoke detectors
drain
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
GB27795/70A
Other languages
English (en)
Inventor
Koju Sasaki
Akihiro Kobayashi
Naoki Takahashi
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 GB1254839A publication Critical patent/GB1254839A/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

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)
GB27795/70A 1969-06-16 1970-06-09 Improved ionization smoke detectors Expired GB1254839A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4688769 1969-06-16
JP4688669 1969-06-16

Publications (1)

Publication Number Publication Date
GB1254839A true GB1254839A (en) 1971-11-24

Family

ID=26387034

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27795/70A Expired GB1254839A (en) 1969-06-16 1970-06-09 Improved ionization smoke detectors

Country Status (9)

Country Link
US (1) US3718919A (de)
AT (1) AT301398B (de)
DE (1) DE2029752B2 (de)
ES (1) ES378081A1 (de)
FR (1) FR2054574B1 (de)
GB (1) GB1254839A (de)
IL (1) IL34107A (de)
NL (1) NL150595B (de)
SE (1) SE348576B (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2130445C3 (de) * 1971-06-19 1981-06-04 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Schaltungsanordnung für zur Meldung und Signalisierung dienende Linienstromkreise
US4020415A (en) * 1974-12-30 1977-04-26 Unitec, Inc. Combustion product indicator
CH586941A5 (de) * 1975-07-25 1977-04-15 Cerberus Ag
USRE30117E (en) * 1975-07-25 1979-10-16 Cerberus Ag Ionization-type fire or smoke sensing system
US4083037A (en) * 1975-12-08 1978-04-04 Patent Development & Management Company Detection circuit

Also Published As

Publication number Publication date
NL7004720A (de) 1970-12-18
IL34107A0 (en) 1970-05-21
DE2029752B2 (de) 1971-12-02
NL150595B (nl) 1976-08-16
FR2054574A1 (de) 1971-04-23
AT301398B (de) 1972-09-11
DE2029752A1 (de) 1971-01-07
US3718919A (en) 1973-02-27
FR2054574B1 (de) 1973-03-16
ES378081A1 (es) 1972-12-01
IL34107A (en) 1972-09-28
SE348576B (de) 1972-09-04

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