GB1310169A - Alarm systems - Google Patents

Alarm systems

Info

Publication number
GB1310169A
GB1310169A GB1415470A GB1415470A GB1310169A GB 1310169 A GB1310169 A GB 1310169A GB 1415470 A GB1415470 A GB 1415470A GB 1415470 A GB1415470 A GB 1415470A GB 1310169 A GB1310169 A GB 1310169A
Authority
GB
United Kingdom
Prior art keywords
detector
smoke
central station
signal
march
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
GB1415470A
Other languages
English (en)
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.)
Siemens AG
Original Assignee
Siemens 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
Application filed by Siemens AG filed Critical Siemens AG
Publication of GB1310169A publication Critical patent/GB1310169A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/04—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using a single signalling line, e.g. in a closed loop

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire Alarms (AREA)
  • Alarm Systems (AREA)
  • Fire-Detection Mechanisms (AREA)
GB1415470A 1969-03-25 1970-03-24 Alarm systems Expired GB1310169A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691915184 DE1915184A1 (de) 1969-03-25 1969-03-25 In Schleifen angeordnete Melder,vorzugsweise Ionisationsfeuermelder

Publications (1)

Publication Number Publication Date
GB1310169A true GB1310169A (en) 1973-03-14

Family

ID=5729253

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1415470A Expired GB1310169A (en) 1969-03-25 1970-03-24 Alarm systems

Country Status (3)

Country Link
CH (1) CH508252A (de)
DE (1) DE1915184A1 (de)
GB (1) GB1310169A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2321747A (en) * 1997-01-30 1998-08-05 Rafiki Protection Limited Fire alarm system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2321747A (en) * 1997-01-30 1998-08-05 Rafiki Protection Limited Fire alarm system
GB2321747B (en) * 1997-01-30 2000-10-18 Rafiki Protection Limited Alarm system

Also Published As

Publication number Publication date
CH508252A (de) 1971-05-31
DE1915184A1 (de) 1970-10-01

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees