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FR358389A - Improvements to lenses - Google Patents

Improvements to lenses

Info

Publication number
FR358389A
FR358389A FR358389DA FR358389A FR 358389 A FR358389 A FR 358389A FR 358389D A FR358389D A FR 358389DA FR 358389 A FR358389 A FR 358389A
Authority
FR
France
Prior art keywords
lenses
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
Corning Glass Works
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.)
Corning Glass Works
Original Assignee
Corning Glass Works
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 Corning Glass Works filed Critical Corning Glass Works
Application granted granted Critical
Publication of FR358389A publication Critical patent/FR358389A/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)
FR358389D 1905-10-10 1905-10-10 Improvements to lenses Expired FR358389A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR358389T 1905-10-10

Publications (1)

Publication Number Publication Date
FR358389A true FR358389A (en) 1906-02-12

Family

ID=1406223

Family Applications (1)

Application Number Title Priority Date Filing Date
FR358389D Expired FR358389A (en) 1905-10-10 1905-10-10 Improvements to lenses

Country Status (1)

Country Link
FR (1) FR358389A (en)

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