CA975856A - Alarm circuit - Google Patents

Alarm circuit

Info

Publication number
CA975856A
CA975856A CA070,740A CA70740A CA975856A CA 975856 A CA975856 A CA 975856A CA 70740 A CA70740 A CA 70740A CA 975856 A CA975856 A CA 975856A
Authority
CA
Canada
Prior art keywords
alarm circuit
alarm
circuit
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
CA070,740A
Inventor
Takeo Arima
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.)
Hochiki Corp
Original Assignee
Hochiki Corp
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 Hochiki Corp filed Critical Hochiki Corp
Application granted granted Critical
Publication of CA975856A publication Critical patent/CA975856A/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

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)
CA070,740A 1968-12-26 1969-12-23 Alarm circuit Expired CA975856A (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
CA975856A true CA975856A (en) 1975-10-07

Family

ID=26372801

Family Applications (1)

Application Number Title Priority Date Filing Date
CA070,740A Expired CA975856A (en) 1968-12-26 1969-12-23 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
EP1344069B1 (en) * 2000-12-20 2007-08-22 Metrix Instrument Company Impact transmitter for reciprocating 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
NL298945A (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
SE355098B (en) 1973-04-02
DE1964764A1 (en) 1970-11-26
YU323069A (en) 1974-12-31
CH519760A (en) 1972-02-29
FI55731B (en) 1979-05-31
US3733596A (en) 1973-05-15
GB1298083A (en) 1972-11-29
FR2027150A1 (en) 1970-09-25
FI55731C (en) 1979-09-10
YU32739B (en) 1975-06-30
DE1964764B2 (en) 1977-11-03

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