SE379874B - - Google Patents

Info

Publication number
SE379874B
SE379874B SE7217074A SE1707472A SE379874B SE 379874 B SE379874 B SE 379874B SE 7217074 A SE7217074 A SE 7217074A SE 1707472 A SE1707472 A SE 1707472A SE 379874 B SE379874 B SE 379874B
Authority
SE
Sweden
Application number
SE7217074A
Inventor
H Beyersdorf
G Bering
L Rims
Original Assignee
Preussag 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
Priority claimed from DE19712165619 external-priority patent/DE2165619C2/en
Priority claimed from DE2230932A external-priority patent/DE2230932C2/en
Application filed by Preussag Ag filed Critical Preussag Ag
Publication of SE379874B publication Critical patent/SE379874B/xx

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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
SE7217074A 1971-12-30 1972-12-28 SE379874B (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19712165619 DE2165619C2 (en) 1971-12-30 Ionization fire alarms
DE7149470 1971-12-30
DE7223616 1972-06-23
DE2230932A DE2230932C2 (en) 1972-06-23 1972-06-23 Ionization fire alarms

Publications (1)

Publication Number Publication Date
SE379874B true SE379874B (en) 1975-10-20

Family

ID=27431379

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7217074A SE379874B (en) 1971-12-30 1972-12-28

Country Status (2)

Country Link
DK (1) DK139546C (en)
SE (1) SE379874B (en)

Also Published As

Publication number Publication date
DK139546C (en) 1979-08-13
DK139546B (en) 1979-03-05

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