BE427958A - - Google Patents

Info

Publication number
BE427958A
BE427958A BE427958DA BE427958A BE 427958 A BE427958 A BE 427958A BE 427958D A BE427958D A BE 427958DA BE 427958 A BE427958 A BE 427958A
Authority
BE
Belgium
Application number
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.)
Publication of BE427958A publication Critical patent/BE427958A/xx

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B27/00—Alarm systems in which the alarm condition is signalled from a central station to a plurality of substations
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Electromagnetism (AREA)
  • Relay Circuits (AREA)
  • Emergency Alarm Devices (AREA)
BE427958D 1937-05-07 BE427958A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1310037A GB495057A (en) 1937-05-07 1937-05-07 Improvements in or relating to electric systems for giving air-raid warnings

Publications (1)

Publication Number Publication Date
BE427958A true BE427958A (enrdf_load_stackoverflow)

Family

ID=10016828

Family Applications (1)

Application Number Title Priority Date Filing Date
BE427958D BE427958A (enrdf_load_stackoverflow) 1937-05-07

Country Status (2)

Country Link
BE (1) BE427958A (enrdf_load_stackoverflow)
GB (1) GB495057A (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3025496A (en) * 1956-09-27 1962-03-13 Landis & Gyr Ag Receiver for remote control impulses
US2990537A (en) * 1957-09-13 1961-06-27 Mc Graw Edison Co Remote control system
US6906616B1 (en) 1995-03-20 2005-06-14 Wheelock, Inc. Apparatus and method for synchronizing visual/audible alarm units in an alarm system
US5608375A (en) 1995-03-20 1997-03-04 Wheelock Inc. Synchronized visual/audible alarm system

Also Published As

Publication number Publication date
GB495057A (en) 1938-11-07

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