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CH333751A - Automatic fire alarm system - Google Patents

Automatic fire alarm system

Info

Publication number
CH333751A
CH333751A CH333751DA CH333751A CH 333751 A CH333751 A CH 333751A CH 333751D A CH333751D A CH 333751DA CH 333751 A CH333751 A CH 333751A
Authority
CH
Switzerland
Prior art keywords
alarm system
fire alarm
automatic fire
automatic
fire
Prior art date
Application number
Other languages
German (de)
Inventor
Gustaf Lindgren Erik
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 CH333751A publication Critical patent/CH333751A/en

Links

Classifications

    • 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
    • G08B29/06—Monitoring of the line circuits, e.g. signalling of line faults
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire Alarms (AREA)
CH333751D 1954-04-01 1955-03-25 Automatic fire alarm system CH333751A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE333751X 1954-04-01

Publications (1)

Publication Number Publication Date
CH333751A true CH333751A (en) 1958-10-31

Family

ID=20308174

Family Applications (1)

Application Number Title Priority Date Filing Date
CH333751D CH333751A (en) 1954-04-01 1955-03-25 Automatic fire alarm system

Country Status (5)

Country Link
US (1) US2847662A (en)
CH (1) CH333751A (en)
DE (1) DE1022500B (en)
FR (1) FR1121427A (en)
GB (1) GB769249A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3083358A (en) * 1957-04-25 1963-03-26 Sound Diffusion Auto Thermatic Detecting and indicating apparatus, particularly for fire
US3066487A (en) * 1958-05-12 1962-12-04 Bendix Corp Combustion starter having overspeed safety
US3144589A (en) * 1959-09-16 1964-08-11 Gen Electric Control system
US5532675A (en) * 1994-12-29 1996-07-02 Linda Johnson Alarm tester
GB2308711A (en) * 1995-12-15 1997-07-02 Cga Direct Thatch temperature monitor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1537211A (en) * 1922-09-07 1925-05-12 John H Wootton Signaling system
DE748751C (en) * 1937-12-21 1944-11-09 Electrical alarm system with one or more monitoring loops
US2605342A (en) * 1948-12-10 1952-07-29 Sherman D Spurling Fire alarm system
US2695994A (en) * 1952-06-25 1954-11-30 Gen Sonics Corp Supervised signaling system
DE956117C (en) * 1954-10-23 1957-01-10 Olaf Ingemar Harald Ekman Alarm or control system

Also Published As

Publication number Publication date
US2847662A (en) 1958-08-12
GB769249A (en) 1957-03-06
DE1022500B (en) 1958-01-09
FR1121427A (en) 1956-08-14

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