FR707574A - Perfectionnements aux indicateurs de direction - Google Patents

Perfectionnements aux indicateurs de direction

Info

Publication number
FR707574A
FR707574A FR707574DA FR707574A FR 707574 A FR707574 A FR 707574A FR 707574D A FR707574D A FR 707574DA FR 707574 A FR707574 A FR 707574A
Authority
FR
France
Prior art keywords
direction indicators
indicators
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
English (en)
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.)
PERRYMAN ELECTRIC CO Inc
Original Assignee
PERRYMAN ELECTRIC 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 PERRYMAN ELECTRIC CO Inc filed Critical PERRYMAN ELECTRIC CO Inc
Application granted granted Critical
Publication of FR707574A publication Critical patent/FR707574A/fr
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
    • G01C17/28—Electromagnetic compasses
    • G01C17/32—Electron compasses

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
FR707574D 1929-11-02 1930-10-31 Perfectionnements aux indicateurs de direction Expired FR707574A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US707574XA 1929-11-02 1929-11-02

Publications (1)

Publication Number Publication Date
FR707574A true FR707574A (fr) 1931-07-09

Family

ID=22097205

Family Applications (1)

Application Number Title Priority Date Filing Date
FR707574D Expired FR707574A (fr) 1929-11-02 1930-10-31 Perfectionnements aux indicateurs de direction

Country Status (1)

Country Link
FR (1) FR707574A (fr)

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