JPS5023697A - - Google Patents

Info

Publication number
JPS5023697A
JPS5023697A JP6246074A JP6246074A JPS5023697A JP S5023697 A JPS5023697 A JP S5023697A JP 6246074 A JP6246074 A JP 6246074A JP 6246074 A JP6246074 A JP 6246074A JP S5023697 A JPS5023697 A JP S5023697A
Authority
JP
Japan
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.)
Granted
Application number
JP6246074A
Other languages
Japanese (ja)
Other versions
JPS5829459B2 (en
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 US00372552A external-priority patent/US3832552A/en
Priority claimed from US00372557A external-priority patent/US3849685A/en
Priority claimed from US00376011A external-priority patent/US3812362A/en
Application filed filed Critical
Publication of JPS5023697A publication Critical patent/JPS5023697A/ja
Publication of JPS5829459B2 publication Critical patent/JPS5829459B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T7/00—Details of radiation-measuring instruments
    • G01T7/12—Provision for actuation of an alarm
    • G01T7/125—Alarm- or controlling circuits using ionisation chambers, proportional counters or Geiger-Mueller tubes, also functioning as UV detectors
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J41/00—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas; Discharge tubes for evacuation by diffusion of ions
    • H01J41/02—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas
    • H01J41/08—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas with ionisation by means of radioactive substances, e.g. alphatrons

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Management (AREA)
  • Business, Economics & Management (AREA)
  • Analytical Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Molecular Biology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
JP49062460A 1973-06-22 1974-06-01 Aeon Shiki Kemuri Kantiki Expired JPS5829459B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US00372552A US3832552A (en) 1973-06-22 1973-06-22 Dual chamber ionization smoke detector
US00372557A US3849685A (en) 1973-06-22 1973-06-22 Ionization chamber with recessed radioactive body
US00376011A US3812362A (en) 1973-07-02 1973-07-02 Smoke detector circuit

Publications (2)

Publication Number Publication Date
JPS5023697A true JPS5023697A (en) 1975-03-13
JPS5829459B2 JPS5829459B2 (en) 1983-06-22

Family

ID=27409086

Family Applications (1)

Application Number Title Priority Date Filing Date
JP49062460A Expired JPS5829459B2 (en) 1973-06-22 1974-06-01 Aeon Shiki Kemuri Kantiki

Country Status (2)

Country Link
JP (1) JPS5829459B2 (en)
GB (1) GB1439448A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5136554A (en) * 1974-07-31 1976-03-27 Hewlett Packard Yokogawa
JP2002365264A (en) * 2001-06-11 2002-12-18 Riken Keiki Co Ltd Ionizing type gas sensor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5136554A (en) * 1974-07-31 1976-03-27 Hewlett Packard Yokogawa
JPS5737972B2 (en) * 1974-07-31 1982-08-12
JP2002365264A (en) * 2001-06-11 2002-12-18 Riken Keiki Co Ltd Ionizing type gas sensor
JP4550320B2 (en) * 2001-06-11 2010-09-22 理研計器株式会社 Ionized gas sensor

Also Published As

Publication number Publication date
JPS5829459B2 (en) 1983-06-22
GB1439448A (en) 1976-06-16

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