FR542896A - Electrical alarm signal - Google Patents

Electrical alarm signal

Info

Publication number
FR542896A
FR542896A FR542896DA FR542896A FR 542896 A FR542896 A FR 542896A FR 542896D A FR542896D A FR 542896DA FR 542896 A FR542896 A FR 542896A
Authority
FR
France
Prior art keywords
alarm signal
electrical alarm
electrical
signal
alarm
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
Heinrich Weeke
August Huther
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 FR542896A publication Critical patent/FR542896A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR542896D 1920-11-08 1921-10-29 Electrical alarm signal Expired FR542896A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE542896X 1920-11-08

Publications (1)

Publication Number Publication Date
FR542896A true FR542896A (en) 1922-08-23

Family

ID=6559837

Family Applications (1)

Application Number Title Priority Date Filing Date
FR542896D Expired FR542896A (en) 1920-11-08 1921-10-29 Electrical alarm signal

Country Status (1)

Country Link
FR (1) FR542896A (en)

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