FR725142A - Improvements to automatic closing and opening gates for level crossings and track crossings - Google Patents

Improvements to automatic closing and opening gates for level crossings and track crossings

Info

Publication number
FR725142A
FR725142A FR725142DA FR725142A FR 725142 A FR725142 A FR 725142A FR 725142D A FR725142D A FR 725142DA FR 725142 A FR725142 A FR 725142A
Authority
FR
France
Prior art keywords
crossings
automatic closing
track
opening gates
level
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
Polak
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 FR725142A publication Critical patent/FR725142A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L29/00—Safety means for rail/road crossing traffic
    • B61L29/08—Operation of gates; Combined operation of gates and signals
    • B61L29/18—Operation by approaching rail vehicle or train
    • B61L29/22—Operation by approaching rail vehicle or train electrically
    • B61L29/222—Operation by approaching rail vehicle or train electrically using conductor circuits with separate contacts or conductors
    • B61L29/224—Operation by approaching rail vehicle or train electrically using conductor circuits with separate contacts or conductors using rail contacts

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
FR725142D 1930-09-17 1931-09-01 Improvements to automatic closing and opening gates for level crossings and track crossings Expired FR725142A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US725142XA 1930-09-17 1930-09-17

Publications (1)

Publication Number Publication Date
FR725142A true FR725142A (en) 1932-05-09

Family

ID=22108083

Family Applications (1)

Application Number Title Priority Date Filing Date
FR725142D Expired FR725142A (en) 1930-09-17 1931-09-01 Improvements to automatic closing and opening gates for level crossings and track crossings

Country Status (1)

Country Link
FR (1) FR725142A (en)

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