FR1019258A - Improvements to sound-controlled signaling systems - Google Patents

Improvements to sound-controlled signaling systems

Info

Publication number
FR1019258A
FR1019258A FR1019258DA FR1019258A FR 1019258 A FR1019258 A FR 1019258A FR 1019258D A FR1019258D A FR 1019258DA FR 1019258 A FR1019258 A FR 1019258A
Authority
FR
France
Prior art keywords
sound
signaling systems
controlled signaling
controlled
systems
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)
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 by Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR1019258A publication Critical patent/FR1019258A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
FR1019258D 1950-03-28 1950-03-28 Improvements to sound-controlled signaling systems Expired FR1019258A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1019258T 1950-03-28

Publications (1)

Publication Number Publication Date
FR1019258A true FR1019258A (en) 1953-01-20

Family

ID=9575538

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1019258D Expired FR1019258A (en) 1950-03-28 1950-03-28 Improvements to sound-controlled signaling systems

Country Status (1)

Country Link
FR (1) FR1019258A (en)

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