GB378560A - Improvements in fire alarm systems - Google Patents

Improvements in fire alarm systems

Info

Publication number
GB378560A
GB378560A GB15071/31A GB1507131A GB378560A GB 378560 A GB378560 A GB 378560A GB 15071/31 A GB15071/31 A GB 15071/31A GB 1507131 A GB1507131 A GB 1507131A GB 378560 A GB378560 A GB 378560A
Authority
GB
United Kingdom
Prior art keywords
relay
fire
alarm
winding
circuit
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
GB15071/31A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB378560A publication Critical patent/GB378560A/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

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Fire Alarms (AREA)
GB15071/31A 1930-06-04 1931-05-21 Improvements in fire alarm systems Expired GB378560A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR697086T 1930-06-04

Publications (1)

Publication Number Publication Date
GB378560A true GB378560A (en) 1932-08-18

Family

ID=9046983

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15071/31A Expired GB378560A (en) 1930-06-04 1931-05-21 Improvements in fire alarm systems

Country Status (3)

Country Link
BE (1) BE379981A (fr)
FR (1) FR697086A (fr)
GB (1) GB378560A (fr)

Also Published As

Publication number Publication date
BE379981A (fr)
FR697086A (fr) 1931-01-12

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