CH498457A - Smoke detector with two ionization chambers - Google Patents

Smoke detector with two ionization chambers

Info

Publication number
CH498457A
CH498457A CH489170A CH489170A CH498457A CH 498457 A CH498457 A CH 498457A CH 489170 A CH489170 A CH 489170A CH 489170 A CH489170 A CH 489170A CH 498457 A CH498457 A CH 498457A
Authority
CH
Switzerland
Prior art keywords
smoke detector
ionization chambers
ionization
chambers
smoke
Prior art date
Application number
CH489170A
Other languages
German (de)
Inventor
Sasaki Koju
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 CH498457A publication Critical patent/CH498457A/en

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)
  • Emergency Alarm Devices (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
CH489170A 1969-04-04 1970-04-02 Smoke detector with two ionization chambers CH498457A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP44025730A JPS5147039B1 (en) 1969-04-04 1969-04-04

Publications (1)

Publication Number Publication Date
CH498457A true CH498457A (en) 1970-10-31

Family

ID=12173907

Family Applications (1)

Application Number Title Priority Date Filing Date
CH489170A CH498457A (en) 1969-04-04 1970-04-02 Smoke detector with two ionization chambers

Country Status (11)

Country Link
JP (1) JPS5147039B1 (en)
AT (1) AT297544B (en)
BE (1) BE732651A (en)
CH (1) CH498457A (en)
DE (1) DE2004584B2 (en)
ES (1) ES375686A1 (en)
FR (1) FR2042047A5 (en)
GB (1) GB1269911A (en)
IL (1) IL33654A (en)
NL (1) NL144410B (en)
SE (1) SE350634B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3904979A1 (en) * 1989-02-18 1990-08-23 Beyersdorf Hartwig METHOD FOR OPERATING AN IONIZATION SMOKE DETECTOR AND IONIZATION SMOKE DETECTOR
US5189399A (en) * 1989-02-18 1993-02-23 Hartwig Beyersdorf Method of operating an ionization smoke alarm and ionization smoke alarm
CN111951514A (en) * 2020-08-03 2020-11-17 深圳职业技术学院 A smoke detection device based on image recognition

Also Published As

Publication number Publication date
DE2004584A1 (en) 1970-11-26
IL33654A (en) 1973-08-29
BE732651A (en) 1969-10-16
ES375686A1 (en) 1972-05-16
FR2042047A5 (en) 1971-02-05
DE2004584B2 (en) 1971-12-23
NL144410B (en) 1974-12-16
IL33654A0 (en) 1970-03-22
SE350634B (en) 1972-10-30
JPS5147039B1 (en) 1976-12-13
NL7001934A (en) 1970-10-06
AT297544B (en) 1972-03-27
GB1269911A (en) 1972-04-06

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Legal Events

Date Code Title Description
PL Patent ceased