GB1255221A - Improvements in or relating to an alarm device and a supervising installation including said device - Google Patents

Improvements in or relating to an alarm device and a supervising installation including said device

Info

Publication number
GB1255221A
GB1255221A GB6224/69A GB622469A GB1255221A GB 1255221 A GB1255221 A GB 1255221A GB 6224/69 A GB6224/69 A GB 6224/69A GB 622469 A GB622469 A GB 622469A GB 1255221 A GB1255221 A GB 1255221A
Authority
GB
United Kingdom
Prior art keywords
alarm
counter
generator
radiation
thyristor
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
GB6224/69A
Other languages
English (en)
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.)
La Detection Electronique Francaise
Original Assignee
La Detection Electronique Francaise
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 La Detection Electronique Francaise filed Critical La Detection Electronique Francaise
Publication of GB1255221A publication Critical patent/GB1255221A/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
    • G08B17/12—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Molecular Biology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Alarm Systems (AREA)
GB6224/69A 1968-02-15 1969-02-05 Improvements in or relating to an alarm device and a supervising installation including said device Expired GB1255221A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR139945 1968-02-15

Publications (1)

Publication Number Publication Date
GB1255221A true GB1255221A (en) 1971-12-01

Family

ID=8646019

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6224/69A Expired GB1255221A (en) 1968-02-15 1969-02-05 Improvements in or relating to an alarm device and a supervising installation including said device

Country Status (11)

Country Link
US (1) US3621262A (ja)
AT (1) AT293920B (ja)
BE (1) BE727699A (ja)
CA (1) CA929251A (ja)
CH (1) CH486746A (ja)
DE (1) DE1906075C3 (ja)
ES (1) ES363669A1 (ja)
FR (1) FR1565498A (ja)
GB (1) GB1255221A (ja)
NL (1) NL164981C (ja)
SE (1) SE344254B (ja)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1353615A (en) * 1970-08-11 1974-05-22 Prucill P M Fire detection systems
JPS5136119B1 (ja) * 1971-04-15 1976-10-06
JPS5512635B2 (ja) * 1972-07-26 1980-04-03
US3775762A (en) * 1972-09-15 1973-11-27 Us Air Force Gas multiplication ultraviolet detector system for fire detection
FR2257118B1 (ja) * 1974-01-04 1976-11-26 Commissariat Energie Atomique
JPS5231699A (en) * 1975-07-25 1977-03-10 Hochiki Corp Fire senser
DE2614487C2 (de) * 1976-04-03 1983-06-23 Total Feuerschutz GmbH, 6802 Ladenburg Schaltungsanordnung zum Auswerten einer Zufallsimpulsfolge von einem strahlungsempfindlichen Gasentladungsdetektor
JPS52153759A (en) * 1976-06-17 1977-12-21 Hochiki Co Storage type detector
US4162425A (en) * 1977-06-30 1979-07-24 Detector Electronics Corporation Ultraviolet detection tube quenching circuitry
JPH0648293B2 (ja) * 1983-03-18 1994-06-22 和芙 橋本 放射能等の自動測定警報装置
US4521120A (en) * 1983-09-15 1985-06-04 The United States Of America As Represented By The Secretary Of Agriculture Forest fire rate of spread with timers method
GB2199656B (en) * 1987-01-07 1990-10-17 Graviner Ltd Detection of electromagnetic radiation
DE3706986A1 (de) * 1987-03-04 1988-09-15 Preussag Ag Feuerschutz Verfahren zur auswertung des uv-anteils im flammenspektrum durch einen elektronischen flammenmelder
US6600425B1 (en) * 2002-03-19 2003-07-29 Elite Access Systems, Inc. Method and apparatus for detecting and recording episodic overloads in a circuit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3175165A (en) * 1962-06-29 1965-03-23 Edward S Dayhoff Light controlled variable frequency pulse generator
US3393319A (en) * 1965-09-30 1968-07-16 Bausch & Lomb Photoelectric circuit for counting light pulses above a minimium value

Also Published As

Publication number Publication date
DE1906075B2 (de) 1973-07-26
CA929251A (en) 1973-06-26
NL164981C (nl) 1981-02-16
DE1906075A1 (de) 1969-09-04
ES363669A1 (es) 1971-01-01
NL6901997A (ja) 1969-08-19
FR1565498A (ja) 1969-05-02
SE344254B (ja) 1972-04-04
NL164981B (nl) 1980-09-15
AT293920B (de) 1971-10-25
DE1906075C3 (de) 1974-02-21
US3621262A (en) 1971-11-16
CH486746A (fr) 1970-02-28
BE727699A (ja) 1969-07-01

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