ES410210A1 - Ionization fire alarm - Google Patents

Ionization fire alarm

Info

Publication number
ES410210A1
ES410210A1 ES410210A ES410210A ES410210A1 ES 410210 A1 ES410210 A1 ES 410210A1 ES 410210 A ES410210 A ES 410210A ES 410210 A ES410210 A ES 410210A ES 410210 A1 ES410210 A1 ES 410210A1
Authority
ES
Spain
Prior art keywords
electrodes
ionization
current
hole
fire alarm
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
ES410210A
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.)
Preussag AG Feuerschutz
Original Assignee
Preussag AG Feuerschutz
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
Priority claimed from DE19712165619 external-priority patent/DE2165619C2/en
Priority claimed from DE2230932A external-priority patent/DE2230932C2/en
Application filed by Preussag AG Feuerschutz filed Critical Preussag AG Feuerschutz
Publication of ES410210A1 publication Critical patent/ES410210A1/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
    • G08B17/113—Constructional details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J41/00—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas; Discharge tubes for evacuation by diffusion of ions
    • H01J41/02—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas
    • H01J41/06—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas with ionisation by means of cold cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J41/00—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas; Discharge tubes for evacuation by diffusion of ions
    • H01J41/02—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas
    • H01J41/08—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas with ionisation by means of radioactive substances, e.g. alphatrons

Abstract

Ionization fire alarm, equipped with an ionization chamber with at least one inlet hole for the surrounding air, two electrodes installed in the ionization chamber and connected to an electrical voltage, and at least one radioactive source that produces a ionization current between the electrodes, characterized by the fact that at least one of the electrodes has a hole on its side turned towards another electrode and because the depth of the hole and the minimum distance between the electrodes are calculated in such a way that produce at least partially turbulent current in the area between the electrodes when the velocities of the surrounding air are at least of the order of the speed of movement of the ions between the electrodes and a practically laminar current in the case of lower velocities. (Machine-translation by Google Translate, not legally binding)
ES410210A 1971-12-30 1972-12-29 Ionization fire alarm Expired ES410210A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19712165619 DE2165619C2 (en) 1971-12-30 Ionization fire alarms
DE2230932A DE2230932C2 (en) 1972-06-23 1972-06-23 Ionization fire alarms

Publications (1)

Publication Number Publication Date
ES410210A1 true ES410210A1 (en) 1975-12-01

Family

ID=25762258

Family Applications (1)

Application Number Title Priority Date Filing Date
ES410210A Expired ES410210A1 (en) 1971-12-30 1972-12-29 Ionization fire alarm

Country Status (9)

Country Link
JP (1) JPS4879998A (en)
AT (1) AT332762B (en)
BE (1) BE793205A (en)
CH (1) CH558059A (en)
ES (1) ES410210A1 (en)
FR (1) FR2166005B3 (en)
GB (1) GB1407639A (en)
IT (1) IT976193B (en)
NL (1) NL7217843A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH551057A (en) * 1973-04-17 1974-06-28 Cerberus Ag IONIZATION ALARM.
AT378431B (en) * 1983-06-30 1985-08-12 Siemens Ag Oesterreich SAMPLE CHAMBER OF CONVENTIONAL SIZE FOR INSTALLATION OF AN IONIZATION SMOKE DETECTOR INSERT

Also Published As

Publication number Publication date
NL7217843A (en) 1973-07-03
FR2166005A1 (en) 1973-08-10
JPS4879998A (en) 1973-10-26
GB1407639A (en) 1975-09-24
IT976193B (en) 1974-08-20
AT332762B (en) 1976-10-11
FR2166005B3 (en) 1976-02-13
ATA1095272A (en) 1976-01-15
BE793205A (en) 1973-04-16
CH558059A (en) 1975-01-15

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