FR703951A - Improvements to fire alarm systems - Google Patents

Improvements to fire alarm systems

Info

Publication number
FR703951A
FR703951A FR703951DA FR703951A FR 703951 A FR703951 A FR 703951A FR 703951D A FR703951D A FR 703951DA FR 703951 A FR703951 A FR 703951A
Authority
FR
France
Prior art keywords
fire alarm
alarm systems
systems
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
Other languages
French (fr)
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Application granted granted Critical
Publication of FR703951A publication Critical patent/FR703951A/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
    • G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
    • 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

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)
  • Alarm Systems (AREA)
FR703951D 1929-01-07 1930-01-04 Improvements to fire alarm systems Expired FR703951A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE703951X 1929-01-07

Publications (1)

Publication Number Publication Date
FR703951A true FR703951A (en) 1931-05-08

Family

ID=20315539

Family Applications (1)

Application Number Title Priority Date Filing Date
FR703951D Expired FR703951A (en) 1929-01-07 1930-01-04 Improvements to fire alarm systems

Country Status (4)

Country Link
DE (1) DE603437C (en)
DK (1) DK44500C (en)
FR (1) FR703951A (en)
GB (1) GB352037A (en)

Also Published As

Publication number Publication date
DE603437C (en) 1934-09-29
DK44500C (en) 1931-08-17
GB352037A (en) 1931-07-06

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