CA2010105A1 - Method of operating an ionization smoke alarm and ionization smoke alarm - Google Patents

Method of operating an ionization smoke alarm and ionization smoke alarm

Info

Publication number
CA2010105A1
CA2010105A1 CA2010105A CA2010105A CA2010105A1 CA 2010105 A1 CA2010105 A1 CA 2010105A1 CA 2010105 A CA2010105 A CA 2010105A CA 2010105 A CA2010105 A CA 2010105A CA 2010105 A1 CA2010105 A1 CA 2010105A1
Authority
CA
Canada
Prior art keywords
smoke alarm
smoke
ionization smoke
potential
measuring chamber
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.)
Granted
Application number
CA2010105A
Other languages
French (fr)
Other versions
CA2010105C (en
Inventor
Hartwig Beyersdorf
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2010105A1 publication Critical patent/CA2010105A1/en
Application granted granted Critical
Publication of CA2010105C publication Critical patent/CA2010105C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • G08B25/002—Generating a prealarm to the central station
    • 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
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/04—Monitoring of the detection circuits
    • G08B29/043—Monitoring of the detection circuits of fire detection circuits
    • 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
    • G08B17/113—Constructional details

Abstract

This detector exhibits a measuring chamber which can be ionised by a radioactive source, is accessible to the environmental air and has a first electrode connected to a d.c. feed voltage and a measuring electrode, the potential of which changes as a function of the density of the smoke when smoke enters the measuring chamber, and is measured for the purpose of generating a smoke alarm signal when it reaches a predetermined value, the potential of the measuring electrode being measured for at least one further electrical field strength and being compared with at least one second potential value which occurs at the second field strength in accordance with the law of small ion deposition when there are smoke aerosols in the measuring chamber. <IMAGE>
CA002010105A 1989-02-18 1990-02-15 Method of operating an ionization smoke alarm and ionization smoke alarm Expired - Fee Related CA2010105C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3904979A DE3904979A1 (en) 1989-02-18 1989-02-18 METHOD FOR OPERATING AN IONIZATION SMOKE DETECTOR AND IONIZATION SMOKE DETECTOR
DEP3904979.5 1989-02-18

Publications (2)

Publication Number Publication Date
CA2010105A1 true CA2010105A1 (en) 1990-08-18
CA2010105C CA2010105C (en) 1996-11-12

Family

ID=6374392

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002010105A Expired - Fee Related CA2010105C (en) 1989-02-18 1990-02-15 Method of operating an ionization smoke alarm and ionization smoke alarm

Country Status (7)

Country Link
EP (1) EP0384209B1 (en)
JP (1) JPH02251748A (en)
AT (1) ATE98798T1 (en)
CA (1) CA2010105C (en)
DE (2) DE3904979A1 (en)
DK (1) DK0384209T3 (en)
ES (1) ES2048332T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5212470A (en) * 1989-09-15 1993-05-18 Cerberus Ltd. Supervised fire alarm system
US6094135A (en) * 1992-11-26 2000-07-25 Secom Co., Ltd. Antitheft system and antitheft apparatus

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH681932A5 (en) * 1990-12-04 1993-06-15 Cerberus Ag
EP0911774B1 (en) * 1997-10-21 2003-07-09 Siemens Aktiengesellschaft Space monitoring sensor
JP4550320B2 (en) * 2001-06-11 2010-09-22 理研計器株式会社 Ionized gas sensor
FR3017232B1 (en) * 2014-02-03 2017-09-01 Finsecur SECURITY HOUSING OF A LOCAL, SECURING AND CONTROL SYSTEMS OF A LOCAL AND METHOD OF CONSTRUCTING A WALL
DE102015004458B4 (en) 2014-06-26 2016-05-12 Elmos Semiconductor Aktiengesellschaft Apparatus and method for a classifying, smokeless air condition sensor for predicting a following operating condition
DE102014019773B4 (en) 2014-12-17 2023-12-07 Elmos Semiconductor Se Device and method for distinguishing between solid objects, cooking fumes and smoke using the display of a mobile telephone
DE102014019172B4 (en) 2014-12-17 2023-12-07 Elmos Semiconductor Se Device and method for distinguishing between solid objects, cooking fumes and smoke using a compensating optical measuring system

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5147039B1 (en) * 1969-04-04 1976-12-13
JPS529998B1 (en) * 1969-04-25 1977-03-19
CH497755A (en) * 1969-06-24 1970-10-15 Cerberus Ag Ionization fire alarms
DE2121382A1 (en) * 1971-04-30 1972-12-21 Preussag Ag Feuerschutz Iomsations fire alarm
DE2257931B2 (en) * 1972-11-25 1978-03-30 Hochiki Corp., Tokio Device for constant function monitoring of a fire alarm system or the like
CH1866172A4 (en) * 1972-12-21 1975-10-15
CH583445A5 (en) * 1974-06-14 1976-12-31 Cerberus Ag
CH572644A5 (en) * 1974-06-24 1976-02-13 Cerberus Ag Ionisation chamber fire detector - with threshold cct. monitoring ionisation current connected to switch cct. for further chamber
CH617280A5 (en) * 1976-08-16 1980-05-14 Hartwig Beyersdorf Ionisation fire detector
CH629905A5 (en) * 1978-07-17 1982-05-14 Cerberus Ag GAS AND / OR FIRE DETECTING SYSTEM.
ZA786519B (en) * 1978-11-20 1980-02-27 Anglo Amer Corp South Africa Detector
DE3004753C2 (en) * 1980-02-08 1983-12-22 Hartwig Dipl.-Ing. 2409 Scharbeutz Beyersdorf Fire alarm device
DE3050185A1 (en) * 1980-02-08 1982-12-02 Hartwig Dipl.-Ing. 2409 Scharbeutz Beyersdorf Ionisation fire detector circuit - has fault monitor releasing alarm when supply voltage or isolation of chamber drops
CH657222A5 (en) * 1981-01-12 1986-08-15 Pyrotector Inc IONIZATION DETECTOR AND USE THEREOF.
DE3123451A1 (en) * 1981-06-12 1982-12-30 Siemens AG, 1000 Berlin und 8000 München METHOD AND ARRANGEMENT FOR DETECTING FAULTS IN DANGEROUS, IN PARTICULAR FIRE DETECTING PLANTS
DE3127324A1 (en) * 1981-07-10 1983-01-27 Siemens AG, 1000 Berlin und 8000 München METHOD AND ARRANGEMENT FOR INCREASING THE SENSITIVITY AND EMERGENCY SAFETY IN A DANGER, IN PARTICULAR FIRE DETECTING SYSTEM
DE3463582D1 (en) * 1983-03-04 1987-06-11 Cerberus Ag Circuit arrangement for the interference level control of detectors, arranged in a danger detection device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5212470A (en) * 1989-09-15 1993-05-18 Cerberus Ltd. Supervised fire alarm system
US6094135A (en) * 1992-11-26 2000-07-25 Secom Co., Ltd. Antitheft system and antitheft apparatus

Also Published As

Publication number Publication date
DE59003821D1 (en) 1994-01-27
DK0384209T3 (en) 1994-02-14
EP0384209A3 (en) 1991-05-08
DE3904979C2 (en) 1992-01-09
ES2048332T3 (en) 1994-03-16
CA2010105C (en) 1996-11-12
EP0384209A2 (en) 1990-08-29
ATE98798T1 (en) 1994-01-15
DE3904979A1 (en) 1990-08-23
EP0384209B1 (en) 1993-12-15
JPH02251748A (en) 1990-10-09

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Legal Events

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EEER Examination request
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