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FR828568A - Improvements to automatic burglar and fire alarms - Google Patents

Improvements to automatic burglar and fire alarms

Info

Publication number
FR828568A
FR828568A FR828568DA FR828568A FR 828568 A FR828568 A FR 828568A FR 828568D A FR828568D A FR 828568DA FR 828568 A FR828568 A FR 828568A
Authority
FR
France
Prior art keywords
fire alarms
automatic burglar
burglar
automatic
alarms
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)
Inventor
Edred Rabjohn Mountstephen
William John Wood
Alexandre George Spence
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 filed Critical
Application granted granted Critical
Publication of FR828568A publication Critical patent/FR828568A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
    • H04M11/045—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems using recorded signals, e.g. speech

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Burglar Alarm Systems (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
FR828568D 1936-11-04 1937-10-30 Improvements to automatic burglar and fire alarms Expired FR828568A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB30013/36A GB484307A (en) 1936-11-04 1936-11-04 Improvements in automatic burglar and fire alarms

Publications (1)

Publication Number Publication Date
FR828568A true FR828568A (en) 1938-05-20

Family

ID=10300856

Family Applications (1)

Application Number Title Priority Date Filing Date
FR828568D Expired FR828568A (en) 1936-11-04 1937-10-30 Improvements to automatic burglar and fire alarms

Country Status (4)

Country Link
US (1) US2161526A (en)
BE (1) BE424391A (en)
FR (1) FR828568A (en)
GB (1) GB484307A (en)

Also Published As

Publication number Publication date
US2161526A (en) 1939-06-06
GB484307A (en) 1938-05-04
BE424391A (en)

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