FR888142A - Mode of illumination of the opaque roses of the magnetic navigation compasses - Google Patents

Mode of illumination of the opaque roses of the magnetic navigation compasses

Info

Publication number
FR888142A
FR888142A FR888142DA FR888142A FR 888142 A FR888142 A FR 888142A FR 888142D A FR888142D A FR 888142DA FR 888142 A FR888142 A FR 888142A
Authority
FR
France
Prior art keywords
roses
compasses
opaque
illumination
mode
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.)
L DOIGNON ATEL
Original Assignee
L DOIGNON ATEL
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 L DOIGNON ATEL filed Critical L DOIGNON ATEL
Application granted granted Critical
Publication of FR888142A publication Critical patent/FR888142A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
    • G01C17/02—Magnetic compasses
    • G01C17/04—Magnetic compasses with north-seeking magnetic elements, e.g. needles
    • G01C17/20—Observing the compass card or needle
    • G01C17/24—Illumination

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR888142D 1942-07-16 1942-07-16 Mode of illumination of the opaque roses of the magnetic navigation compasses Expired FR888142A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR888142T 1942-07-16

Publications (1)

Publication Number Publication Date
FR888142A true FR888142A (en) 1943-12-03

Family

ID=9376590

Family Applications (1)

Application Number Title Priority Date Filing Date
FR888142D Expired FR888142A (en) 1942-07-16 1942-07-16 Mode of illumination of the opaque roses of the magnetic navigation compasses

Country Status (1)

Country Link
FR (1) FR888142A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2738412A (en) * 1952-11-07 1956-03-13 Nye S Spencer Compass illuminating assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2738412A (en) * 1952-11-07 1956-03-13 Nye S Spencer Compass illuminating assembly

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