FR847230A - Improvements to magnetic compasses - Google Patents

Improvements to magnetic compasses

Info

Publication number
FR847230A
FR847230A FR847230DA FR847230A FR 847230 A FR847230 A FR 847230A FR 847230D A FR847230D A FR 847230DA FR 847230 A FR847230 A FR 847230A
Authority
FR
France
Prior art keywords
magnetic compasses
compasses
magnetic
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.)
Sperry Gyroscope Co Ltd
Sperry Gyroscope Co Inc
Original Assignee
Sperry Gyroscope Co Ltd
Sperry Gyroscope Co Inc
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 Sperry Gyroscope Co Ltd, Sperry Gyroscope Co Inc filed Critical Sperry Gyroscope Co Ltd
Application granted granted Critical
Publication of FR847230A publication Critical patent/FR847230A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR847230D 1937-12-09 1938-12-07 Improvements to magnetic compasses Expired FR847230A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US847230XA 1937-12-09 1937-12-09

Publications (1)

Publication Number Publication Date
FR847230A true FR847230A (en) 1939-10-05

Family

ID=22186817

Family Applications (1)

Application Number Title Priority Date Filing Date
FR847230D Expired FR847230A (en) 1937-12-09 1938-12-07 Improvements to magnetic compasses

Country Status (1)

Country Link
FR (1) FR847230A (en)

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