GB495057A - Improvements in or relating to electric systems for giving air-raid warnings - Google Patents

Improvements in or relating to electric systems for giving air-raid warnings

Info

Publication number
GB495057A
GB495057A GB1310037A GB1310037A GB495057A GB 495057 A GB495057 A GB 495057A GB 1310037 A GB1310037 A GB 1310037A GB 1310037 A GB1310037 A GB 1310037A GB 495057 A GB495057 A GB 495057A
Authority
GB
United Kingdom
Prior art keywords
lights
key
relay
network
hooters
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
GB1310037A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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
Priority to BE427958D priority Critical patent/BE427958A/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB1310037A priority patent/GB495057A/en
Publication of GB495057A publication Critical patent/GB495057A/en
Expired legal-status Critical Current

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)
GB1310037A 1937-05-07 1937-05-07 Improvements in or relating to electric systems for giving air-raid warnings Expired GB495057A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE427958D BE427958A (enrdf_load_stackoverflow) 1937-05-07
GB1310037A GB495057A (en) 1937-05-07 1937-05-07 Improvements in or relating to electric systems for giving air-raid warnings

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
GB495057A true GB495057A (en) 1938-11-07

Family

ID=10016828

Family Applications (1)

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

Country Status (2)

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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2990537A (en) * 1957-09-13 1961-06-27 Mc Graw Edison Co Remote control system
US3025496A (en) * 1956-09-27 1962-03-13 Landis & Gyr Ag Receiver for remote control impulses
US7403096B2 (en) 1995-03-20 2008-07-22 Wheelock, Inc. Apparatus and method for synchronizing visual/audible alarm units in an alarm system
US7907047B2 (en) 1995-03-20 2011-03-15 Wheelock, Inc. Apparatus and method for synchronizing visual/audible alarm units in an alarm system

Cited By (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
US7403096B2 (en) 1995-03-20 2008-07-22 Wheelock, Inc. Apparatus and method for synchronizing visual/audible alarm units in an alarm system
US7907047B2 (en) 1995-03-20 2011-03-15 Wheelock, Inc. Apparatus and method for synchronizing visual/audible alarm units in an alarm system

Also Published As

Publication number Publication date
BE427958A (enrdf_load_stackoverflow)

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