IT1077568B - Dispositivo di allarme e di rilevamento di fumo - Google Patents

Dispositivo di allarme e di rilevamento di fumo

Info

Publication number
IT1077568B
IT1077568B IT1920277A IT1920277A IT1077568B IT 1077568 B IT1077568 B IT 1077568B IT 1920277 A IT1920277 A IT 1920277A IT 1920277 A IT1920277 A IT 1920277A IT 1077568 B IT1077568 B IT 1077568B
Authority
IT
Italy
Prior art keywords
step level
ionisation chamber
level circuit
smoke detector
transistor
Prior art date
Application number
IT1920277A
Other languages
English (en)
Original Assignee
Emhart Ind
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 Emhart Ind filed Critical Emhart Ind
Priority to IT1920277A priority Critical patent/IT1077568B/it
Application granted granted Critical
Publication of IT1077568B publication Critical patent/IT1077568B/it

Links

Landscapes

  • Fire-Detection Mechanisms (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
IT1920277A 1977-01-12 1977-01-12 Dispositivo di allarme e di rilevamento di fumo IT1077568B (it)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IT1920277A IT1077568B (it) 1977-01-12 1977-01-12 Dispositivo di allarme e di rilevamento di fumo

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1920277A IT1077568B (it) 1977-01-12 1977-01-12 Dispositivo di allarme e di rilevamento di fumo

Publications (1)

Publication Number Publication Date
IT1077568B true IT1077568B (it) 1985-05-04

Family

ID=11155751

Family Applications (1)

Application Number Title Priority Date Filing Date
IT1920277A IT1077568B (it) 1977-01-12 1977-01-12 Dispositivo di allarme e di rilevamento di fumo

Country Status (1)

Country Link
IT (1) IT1077568B (it)

Similar Documents

Publication Publication Date Title
ES415905A1 (es) Perfeccionamientos en los avisadores de incendios por ioni-zacion.
US4091363A (en) Self-contained fire detector with interconnection circuitry
GB1295498A (it)
GB1291755A (en) Ionization fire alarm with insulation monitoring
US4138664A (en) Warning device
GB1527011A (en) Ionization smoke sensors
ES444964A1 (es) Un detector de ionizacion.
GB1394642A (en) Electrical alarm instruments
IE45520L (en) Smoke detector
NL7601261A (nl) Schakeling met een lage impedantie met ionisatie rook-sondes.
IT1077568B (it) Dispositivo di allarme e di rilevamento di fumo
NL7700428A (en) Smoke detector system with electrical operation of ionisation chamber - has step level circuit which includes programmable unijunction transistor
FR2377069A1 (fr) Detecteur de fumee avec dispositif d'alarme
US4109240A (en) Ionization-type fire sensing system
ATE11345T1 (de) Ionisationsrauchmelder mit erhoehter betriebssicherheit.
FR2314505A1 (fr) Radiametre
GB1212039A (en) Boundary value voltage or current sensors
GB1079360A (en) Improvements in leak detectors
US3582646A (en) Ionization fire detection device
FR2274982A1 (fr) Installation d'avertissement d'incendie
CA1064625A (en) Fire sensor device
GB1469267A (en) Fire sensing system including an ionization chamber
GB1512545A (en) Ionisation fire sensors
JPS5449197A (en) Ion type smoke sensor
GB1478952A (en) Fire alarm devices and in installations including such devices