FR346173A - Device for correcting road errors on the compass - Google Patents

Device for correcting road errors on the compass

Info

Publication number
FR346173A
FR346173A FR346173DA FR346173A FR 346173 A FR346173 A FR 346173A FR 346173D A FR346173D A FR 346173DA FR 346173 A FR346173 A FR 346173A
Authority
FR
France
Prior art keywords
compass
correcting road
errors
road errors
correcting
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
George Ira Herrick
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR346173A publication Critical patent/FR346173A/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)
FR346173D 1903-09-12 1904-09-12 Device for correcting road errors on the compass Expired FR346173A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US346173XA 1903-09-12 1903-09-12

Publications (1)

Publication Number Publication Date
FR346173A true FR346173A (en) 1905-01-06

Family

ID=1394911

Family Applications (1)

Application Number Title Priority Date Filing Date
FR346173D Expired FR346173A (en) 1903-09-12 1904-09-12 Device for correcting road errors on the compass

Country Status (1)

Country Link
FR (1) FR346173A (en)

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