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
Other languages
English (en)
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 Alarms (AREA)
  • Fire-Detection Mechanisms (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 (cs)
CA (1) CA975856A (cs)
CH (1) CH519760A (cs)
DE (1) DE1964764B2 (cs)
FI (1) FI55731C (cs)
FR (1) FR2027150A1 (cs)
GB (1) GB1298083A (cs)
SE (1) SE355098B (cs)
YU (1) YU32739B (cs)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50129292A (cs) * 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 (cs) * 1975-10-03 1980-09-05
DE2638068C3 (de) * 1976-08-24 1986-11-13 Siemens AG, 1000 Berlin und 8000 München Brandmeldeanlage mit mehreren über eine Meldeschleife betreibbaren Meldern
DE2641489C2 (de) * 1976-09-15 1984-05-30 Siemens AG, 1000 Berlin und 8000 München Verfahren zur Übertragung von Meßwerten in einem Brandmeldesystem
JPS5760147Y2 (cs) * 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 (ja) * 1978-08-26 1983-07-11 ホーチキ株式会社 イオン化式煙感知器
US5898369A (en) * 1996-01-18 1999-04-27 Godwin; Paul K. Communicating hazardous condition detector
US6588279B2 (en) * 2000-12-20 2003-07-08 Metrix Instruments Co. 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
NL108575C (cs) * 1957-02-19
US3018376A (en) * 1957-11-29 1962-01-23 Nat Res Corp Gas density measurement
BE638121A (cs) * 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
GB1298083A (en) 1972-11-29
DE1964764B2 (de) 1977-11-03
DE1964764A1 (de) 1970-11-26
YU32739B (en) 1975-06-30
YU323069A (en) 1974-12-31
US3733596A (en) 1973-05-15
SE355098B (cs) 1973-04-02
CH519760A (fr) 1972-02-29
FI55731C (fi) 1979-09-10
FI55731B (fi) 1979-05-31
FR2027150A1 (cs) 1970-09-25

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