FR519017A - Improvements in light signals - Google Patents

Improvements in light signals

Info

Publication number
FR519017A
FR519017A FR519017A FR519017DA FR519017A FR 519017 A FR519017 A FR 519017A FR 519017 A FR519017 A FR 519017A FR 519017D A FR519017D A FR 519017DA FR 519017 A FR519017 A FR 519017A
Authority
FR
France
Prior art keywords
light signals
signals
light
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
FR519017A
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.)
POSITION LIGHT SIGNAL Co
Original Assignee
POSITION LIGHT SIGNAL Co
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 POSITION LIGHT SIGNAL Co filed Critical POSITION LIGHT SIGNAL Co
Application granted granted Critical
Publication of FR519017A publication Critical patent/FR519017A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L9/00—Illumination specially adapted for points, form signals, or gates
    • B61L9/04—Illumination specially adapted for points, form signals, or gates electric

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
FR519017A 1914-07-13 1920-06-22 Improvements in light signals Expired FR519017A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US519017XA 1914-07-13 1914-07-13

Publications (1)

Publication Number Publication Date
FR519017A true FR519017A (en) 1921-06-03

Family

ID=21974062

Family Applications (1)

Application Number Title Priority Date Filing Date
FR519017A Expired FR519017A (en) 1914-07-13 1920-06-22 Improvements in light signals

Country Status (1)

Country Link
FR (1) FR519017A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1047684B (en) * 1955-11-03 1958-12-24 Siemens Ag Optical arrangement for light signals, in particular daylight signals, with diffusion discs and depth diffusion mirrors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1047684B (en) * 1955-11-03 1958-12-24 Siemens Ag Optical arrangement for light signals, in particular daylight signals, with diffusion discs and depth diffusion mirrors

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