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ES415905A1 - Ionization-type fire sensor - Google Patents

Ionization-type fire sensor

Info

Publication number
ES415905A1
ES415905A1 ES415905A ES415905A ES415905A1 ES 415905 A1 ES415905 A1 ES 415905A1 ES 415905 A ES415905 A ES 415905A ES 415905 A ES415905 A ES 415905A ES 415905 A1 ES415905 A1 ES 415905A1
Authority
ES
Spain
Prior art keywords
threshold
signal
ionization
threshold level
warning signal
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
ES415905A
Other languages
Spanish (es)
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.)
Cerberus AG
Original Assignee
Cerberus AG
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 Cerberus AG filed Critical Cerberus AG
Publication of ES415905A1 publication Critical patent/ES415905A1/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/04—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using a single signalling line, e.g. in a closed loop

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Fire Alarms (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Printing Plates And Materials Therefor (AREA)

Abstract

An ionization chamber includes an ionizing element which, in combination with an electrical circuit, is so arranged that the electrical resistance of the chamber increases when smoke, or fire aerosols are detected the sensor further includes an electrical circuit which has a first threshold detector responsive to a first threshold value of increase of resistance to permit generation of a warning signal, and a second threshold level with a second threshold detector, which responds upon exceeding of the second threshold level to provide an alarm signal different from the first warning signal arising at the first threshold level. Preferably, the warning signal is a constantly arising current, and the alarm signal is a signal of varying intensity.
ES415905A 1972-07-17 1973-06-14 Ionization-type fire sensor Expired ES415905A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1065572 1972-07-17

Publications (1)

Publication Number Publication Date
ES415905A1 true ES415905A1 (en) 1976-02-01

Family

ID=4365446

Family Applications (1)

Application Number Title Priority Date Filing Date
ES415905A Expired ES415905A1 (en) 1972-07-17 1973-06-14 Ionization-type fire sensor

Country Status (19)

Country Link
US (1) US3909813A (en)
JP (1) JPS4970691A (en)
AT (1) AT339777B (en)
AU (1) AU474603B2 (en)
BE (1) BE801719A (en)
BR (1) BR7305317D0 (en)
CA (1) CA1018680A (en)
CH (1) CH547532A (en)
DE (1) DE2328872C3 (en)
DK (1) DK138714B (en)
ES (1) ES415905A1 (en)
FI (1) FI59498C (en)
FR (1) FR2193224B1 (en)
GB (1) GB1412164A (en)
HK (1) HK57380A (en)
IT (1) IT988800B (en)
NO (1) NO136269C (en)
SE (1) SE392357B (en)
ZA (1) ZA734853B (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5617815Y2 (en) * 1974-07-10 1981-04-24
JPS5150786A (en) * 1974-10-29 1976-05-04 Mitsubishi Electric Corp IONKASHIKIKE MURITANCHIKI
JPS52142999A (en) * 1976-05-24 1977-11-29 Nohmi Bosai Kogyo Co Ltd Fire alarm facility
DE2707409C2 (en) * 1977-02-21 1985-02-21 Hartwig Dipl.-Ing. 2409 Scharbeutz Beyersdorf Ionization fire detector
US4207558A (en) * 1978-04-03 1980-06-10 Pittway Corporation Interconnection circuit for a plurality of alarm units
USRE30620E (en) * 1978-07-03 1981-05-19 P. R. Mallory & Co. Inc. High output smoke and heat detector alarm system utilizing a piezoelectric transducer and a voltage doubling means
CH629905A5 (en) * 1978-07-17 1982-05-14 Cerberus Ag GAS AND / OR FIRE DETECTING SYSTEM.
JPS5555752U (en) * 1978-10-12 1980-04-15
US4223303A (en) * 1978-12-11 1980-09-16 General Electric Company Alarm devices for interconnected multi-device systems
US4401978A (en) * 1979-02-21 1983-08-30 The Gamewell Corporation Combination detector
EP0039761A3 (en) * 1980-05-09 1981-11-25 Cerberus Ag Fire annunciating arrangement and method
JPH079680B2 (en) * 1985-04-01 1995-02-01 ホーチキ株式会社 Analog fire alarm
CH669859A5 (en) * 1986-06-03 1989-04-14 Cerberus Ag
EP0338218B1 (en) * 1988-03-30 1993-09-15 Cerberus Ag Early fire detection method
JPH0259461U (en) * 1988-10-21 1990-05-01
RU2182366C2 (en) * 2000-03-29 2002-05-10 Институт физико-технических проблем Ionization fire alarm
US6753786B1 (en) 2000-08-11 2004-06-22 Walter Kidde Portable Equipment, Inc. Microprocessor-based combination smoke and carbon monoxide detector having intelligent hush feature
US7068177B2 (en) * 2002-09-19 2006-06-27 Honeywell International, Inc. Multi-sensor device and methods for fire detection
US20080030352A1 (en) * 2006-02-27 2008-02-07 Thorn Security Limited Methods and systems for gas detection
WO2015054225A1 (en) 2013-10-07 2015-04-16 Google Inc. Smart-home hazard detector providing non-alarm status signals at opportune moments
US9685061B2 (en) * 2015-05-20 2017-06-20 Google Inc. Event prioritization and user interfacing for hazard detection in multi-room smart-home environment

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3665441A (en) * 1970-09-14 1972-05-23 Gen Signal Corp Method and apparatus for detecting aerosols

Also Published As

Publication number Publication date
CA1018680A (en) 1977-10-04
HK57380A (en) 1980-10-16
NO136269B (en) 1977-05-02
ATA456073A (en) 1977-02-15
FR2193224B1 (en) 1978-12-29
FI59498B (en) 1981-04-30
AT339777B (en) 1977-11-10
DK138714B (en) 1978-10-16
GB1412164A (en) 1975-10-29
AU5798673A (en) 1975-01-16
DE2328872C3 (en) 1981-01-08
FR2193224A1 (en) 1974-02-15
SE392357B (en) 1977-03-21
ZA734853B (en) 1974-06-26
US3909813A (en) 1975-09-30
DK138714C (en) 1979-03-19
FI59498C (en) 1981-08-10
CH547532A (en) 1974-03-29
DE2328872A1 (en) 1974-01-31
JPS4970691A (en) 1974-07-09
AU474603B2 (en) 1976-07-29
IT988800B (en) 1975-04-30
BE801719A (en) 1973-10-15
BR7305317D0 (en) 1974-08-22
DE2328872B2 (en) 1980-05-14
NO136269C (en) 1977-08-17

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