FR639277A - Improvements in light signals - Google Patents

Improvements in light signals

Info

Publication number
FR639277A
FR639277A FR639277DA FR639277A FR 639277 A FR639277 A FR 639277A FR 639277D A FR639277D A FR 639277DA FR 639277 A FR639277 A FR 639277A
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
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.)
Compagnie Generale de Signalisation
Original Assignee
Compagnie Generale de Signalisation
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 Compagnie Generale de Signalisation filed Critical Compagnie Generale de Signalisation
Application granted granted Critical
Publication of FR639277A publication Critical patent/FR639277A/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)
FR639277D 1926-10-27 1927-08-10 Improvements in light signals Expired FR639277A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US639277XA 1926-10-27 1926-10-27

Publications (1)

Publication Number Publication Date
FR639277A true FR639277A (en) 1928-06-18

Family

ID=22052415

Family Applications (1)

Application Number Title Priority Date Filing Date
FR639277D Expired FR639277A (en) 1926-10-27 1927-08-10 Improvements in light signals

Country Status (1)

Country Link
FR (1) FR639277A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2953961A (en) * 1957-02-01 1960-09-27 Gen Motors Corp Rear vision means
US4269168A (en) * 1978-12-18 1981-05-26 Johnson Steven A Focusing reflector solar energy collector apparatus and method
US4284839A (en) * 1978-12-18 1981-08-18 Johnson Steven A Internal refractor focusing solar energy collector apparatus and method
US4297521A (en) * 1978-12-18 1981-10-27 Johnson Steven A Focusing cover solar energy collector apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2953961A (en) * 1957-02-01 1960-09-27 Gen Motors Corp Rear vision means
US4269168A (en) * 1978-12-18 1981-05-26 Johnson Steven A Focusing reflector solar energy collector apparatus and method
US4284839A (en) * 1978-12-18 1981-08-18 Johnson Steven A Internal refractor focusing solar energy collector apparatus and method
US4297521A (en) * 1978-12-18 1981-10-27 Johnson Steven A Focusing cover solar energy collector apparatus

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