FR912850A - Improvements to signaling devices - Google Patents

Improvements to signaling devices

Info

Publication number
FR912850A
FR912850A FR912850DA FR912850A FR 912850 A FR912850 A FR 912850A FR 912850D A FR912850D A FR 912850DA FR 912850 A FR912850 A FR 912850A
Authority
FR
France
Prior art keywords
signaling devices
signaling
devices
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
Thomas Herbert Ridley Emmerson
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 FR912850A publication Critical patent/FR912850A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L2/00—Systems of electric lighting devices

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
FR912850D 1942-02-06 1945-07-28 Improvements to signaling devices Expired FR912850A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB912850X 1942-02-06

Publications (1)

Publication Number Publication Date
FR912850A true FR912850A (en) 1946-08-21

Family

ID=10706972

Family Applications (1)

Application Number Title Priority Date Filing Date
FR912850D Expired FR912850A (en) 1942-02-06 1945-07-28 Improvements to signaling devices

Country Status (1)

Country Link
FR (1) FR912850A (en)

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