FR472133A - Improvements to signal systems - Google Patents

Improvements to signal systems

Info

Publication number
FR472133A
FR472133A FR472133DA FR472133A FR 472133 A FR472133 A FR 472133A FR 472133D A FR472133D A FR 472133DA FR 472133 A FR472133 A FR 472133A
Authority
FR
France
Prior art keywords
signal systems
systems
signal
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
Fay H Webster
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR472133A publication Critical patent/FR472133A/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
    • G08B5/24—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane
    • G08B5/28—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane with hinged flap or arm

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
FR472133D 1914-05-12 1914-05-12 Improvements to signal systems Expired FR472133A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR472133T 1914-05-12

Publications (1)

Publication Number Publication Date
FR472133A true FR472133A (en) 1914-11-24

Family

ID=1510335

Family Applications (1)

Application Number Title Priority Date Filing Date
FR472133D Expired FR472133A (en) 1914-05-12 1914-05-12 Improvements to signal systems

Country Status (1)

Country Link
FR (1) FR472133A (en)

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