CH519760A - Alarm circuit - Google Patents

Alarm circuit

Info

Publication number
CH519760A
CH519760A CH1930769A CH1930769A CH519760A CH 519760 A CH519760 A CH 519760A CH 1930769 A CH1930769 A CH 1930769A CH 1930769 A CH1930769 A CH 1930769A CH 519760 A CH519760 A CH 519760A
Authority
CH
Switzerland
Prior art keywords
alarm circuit
alarm
circuit
Prior art date
Application number
CH1930769A
Other languages
French (fr)
Inventor
Arima Takeo
Original Assignee
Tokyo Hochiki Kk
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 Tokyo Hochiki Kk filed Critical Tokyo Hochiki Kk
Publication of CH519760A publication Critical patent/CH519760A/en

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

Landscapes

  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Molecular Biology (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Fire Alarms (AREA)
  • Emergency Alarm Devices (AREA)
  • Alarm Systems (AREA)
CH1930769A 1968-12-26 1969-12-26 Alarm circuit CH519760A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9561468 1968-12-26
JP3401269 1969-05-03

Publications (1)

Publication Number Publication Date
CH519760A true CH519760A (en) 1972-02-29

Family

ID=26372801

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1930769A CH519760A (en) 1968-12-26 1969-12-26 Alarm circuit

Country Status (9)

Country Link
US (1) US3733596A (en)
CA (1) CA975856A (en)
CH (1) CH519760A (en)
DE (1) DE1964764B2 (en)
FI (1) FI55731C (en)
FR (1) FR2027150A1 (en)
GB (1) GB1298083A (en)
SE (1) SE355098B (en)
YU (1) YU32739B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50129292A (en) * 1974-03-30 1975-10-13
US3961195A (en) * 1974-08-26 1976-06-01 Timothy John Newington Fire detector having means for heating the support member of an electrode to prevent formation of moisture thereon
JPS5538000Y2 (en) * 1975-10-03 1980-09-05
DE2638068C3 (en) * 1976-08-24 1986-11-13 Siemens AG, 1000 Berlin und 8000 München Fire alarm system with several detectors that can be operated via a message loop
DE2641489C2 (en) * 1976-09-15 1984-05-30 Siemens AG, 1000 Berlin und 8000 München Method for the transmission of measured values in a fire alarm system
JPS5760147Y2 (en) * 1977-07-04 1982-12-22
US4207558A (en) * 1978-04-03 1980-06-10 Pittway Corporation Interconnection circuit for a plurality of alarm units
JPS5831275Y2 (en) * 1978-08-26 1983-07-11 ホーチキ株式会社 ionization smoke detector
US5898369A (en) * 1996-01-18 1999-04-27 Godwin; Paul K. Communicating hazardous condition detector
ATE371194T1 (en) * 2000-12-20 2007-09-15 Metrix Instr Company IMPACT TRANSDUCER FOR PISTON MACHINES

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2877453A (en) * 1956-01-17 1959-03-10 Jr Alfred L Mendenhall Smoke detecting device
BE564961A (en) * 1957-02-19
US3018376A (en) * 1957-11-29 1962-01-23 Nat Res Corp Gas density measurement
BE638121A (en) * 1962-10-12
US3555532A (en) * 1968-10-29 1971-01-12 Graham Stuart Corp Vapor or particle detection device

Also Published As

Publication number Publication date
DE1964764B2 (en) 1977-11-03
YU32739B (en) 1975-06-30
FR2027150A1 (en) 1970-09-25
FI55731B (en) 1979-05-31
DE1964764A1 (en) 1970-11-26
SE355098B (en) 1973-04-02
US3733596A (en) 1973-05-15
YU323069A (en) 1974-12-31
GB1298083A (en) 1972-11-29
FI55731C (en) 1979-09-10
CA975856A (en) 1975-10-07

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Legal Events

Date Code Title Description
PL Patent ceased