FR1005568A - Electrical signaling and alarm device - Google Patents

Electrical signaling and alarm device

Info

Publication number
FR1005568A
FR1005568A FR1005568DA FR1005568A FR 1005568 A FR1005568 A FR 1005568A FR 1005568D A FR1005568D A FR 1005568DA FR 1005568 A FR1005568 A FR 1005568A
Authority
FR
France
Prior art keywords
alarm device
electrical signaling
signaling
electrical
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
Paul Lieser
Gustav Zahnow
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 FR1005568A publication Critical patent/FR1005568A/en
Expired legal-status Critical Current

Links

Classifications

    • 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)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
FR1005568D 1947-08-12 1947-08-12 Electrical signaling and alarm device Expired FR1005568A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1005568T 1947-08-12

Publications (1)

Publication Number Publication Date
FR1005568A true FR1005568A (en) 1952-04-11

Family

ID=9564907

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1005568D Expired FR1005568A (en) 1947-08-12 1947-08-12 Electrical signaling and alarm device

Country Status (1)

Country Link
FR (1) FR1005568A (en)

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