FI45139C - Device for fire alarm systems. - Google Patents

Device for fire alarm systems.

Info

Publication number
FI45139C
FI45139C FI652744A FI274465A FI45139C FI 45139 C FI45139 C FI 45139C FI 652744 A FI652744 A FI 652744A FI 274465 A FI274465 A FI 274465A FI 45139 C FI45139 C FI 45139C
Authority
FI
Finland
Prior art keywords
fire alarm
alarm systems
systems
fire
alarm
Prior art date
Application number
FI652744A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI45139B (en
Inventor
Lindgren Erik Gustaf
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of FI45139B publication Critical patent/FI45139B/fi
Application granted granted Critical
Publication of FI45139C publication Critical patent/FI45139C/en

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
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
    • G08B17/107—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device for detecting light-scattering due to smoke
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Emergency Lowering Means (AREA)
FI652744A 1965-01-11 1965-11-16 Device for fire alarm systems. FI45139C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE321/65A SE311306B (en) 1965-01-11 1965-01-11

Publications (2)

Publication Number Publication Date
FI45139B FI45139B (en) 1971-11-30
FI45139C true FI45139C (en) 1972-03-10

Family

ID=20256359

Family Applications (1)

Application Number Title Priority Date Filing Date
FI652744A FI45139C (en) 1965-01-11 1965-11-16 Device for fire alarm systems.

Country Status (5)

Country Link
CH (1) CH448815A (en)
DK (1) DK114678B (en)
FI (1) FI45139C (en)
NO (1) NO117679B (en)
SE (1) SE311306B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5993253B2 (en) 2012-09-06 2016-09-14 能美防災株式会社 smoke detector

Also Published As

Publication number Publication date
FI45139B (en) 1971-11-30
CH448815A (en) 1967-12-15
NO117679B (en) 1969-09-08
DK114678B (en) 1969-07-21
SE311306B (en) 1969-06-02

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