FR620570A - Automatic warning signal - Google Patents

Automatic warning signal

Info

Publication number
FR620570A
FR620570A FR620570DA FR620570A FR 620570 A FR620570 A FR 620570A FR 620570D A FR620570D A FR 620570DA FR 620570 A FR620570 A FR 620570A
Authority
FR
France
Prior art keywords
warning signal
automatic warning
automatic
signal
warning
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
Marcel Duhard
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 FR620570A publication Critical patent/FR620570A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/02—Detecting movement of traffic to be counted or controlled using treadles built into the road

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR620570D 1926-08-24 1926-08-24 Automatic warning signal Expired FR620570A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR620570T 1926-08-24

Publications (1)

Publication Number Publication Date
FR620570A true FR620570A (en) 1927-04-25

Family

ID=8984486

Family Applications (1)

Application Number Title Priority Date Filing Date
FR620570D Expired FR620570A (en) 1926-08-24 1926-08-24 Automatic warning signal

Country Status (1)

Country Link
FR (1) FR620570A (en)

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