FR699621A - yellow screens for signage - Google Patents

yellow screens for signage

Info

Publication number
FR699621A
FR699621A FR699621DA FR699621A FR 699621 A FR699621 A FR 699621A FR 699621D A FR699621D A FR 699621DA FR 699621 A FR699621 A FR 699621A
Authority
FR
France
Prior art keywords
signage
screens
yellow
yellow screens
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
Georges Avril
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 FR699621A publication Critical patent/FR699621A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
    • B61L5/12—Visible signals
    • B61L5/18—Light signals; Mechanisms associated therewith, e.g. blinders
    • B61L5/1809—Daylight signals
    • B61L5/1845—Optical systems, lenses

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
FR699621D 1930-07-18 1930-07-18 yellow screens for signage Expired FR699621A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR699621T 1930-07-18

Publications (1)

Publication Number Publication Date
FR699621A true FR699621A (en) 1931-02-18

Family

ID=9048327

Family Applications (1)

Application Number Title Priority Date Filing Date
FR699621D Expired FR699621A (en) 1930-07-18 1930-07-18 yellow screens for signage

Country Status (1)

Country Link
FR (1) FR699621A (en)

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