FR799250A - Improvements to magnetic compasses - Google Patents

Improvements to magnetic compasses

Info

Publication number
FR799250A
FR799250A FR799250DA FR799250A FR 799250 A FR799250 A FR 799250A FR 799250D A FR799250D A FR 799250DA FR 799250 A FR799250 A FR 799250A
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 Products Inc
Original Assignee
Sperry Products 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 Products Inc filed Critical Sperry Products Inc
Application granted granted Critical
Publication of FR799250A publication Critical patent/FR799250A/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)
  • Toys (AREA)
FR799250D 1934-12-07 1935-12-05 Improvements to magnetic compasses Expired FR799250A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US467735XA 1934-12-07 1934-12-07

Publications (1)

Publication Number Publication Date
FR799250A true FR799250A (en) 1936-06-09

Family

ID=21945319

Family Applications (1)

Application Number Title Priority Date Filing Date
FR799250D Expired FR799250A (en) 1934-12-07 1935-12-05 Improvements to magnetic compasses

Country Status (2)

Country Link
FR (1) FR799250A (en)
GB (1) GB467735A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2316579A1 (en) * 1975-06-17 1977-01-28 Laitram Corp REMOTE READING MAGNETIC COMPASS

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108104798B (en) * 2017-03-10 2021-09-21 苏州弘开传感科技有限公司 Tunnel positioning instrument based on magnetic field principle and using method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2316579A1 (en) * 1975-06-17 1977-01-28 Laitram Corp REMOTE READING MAGNETIC COMPASS

Also Published As

Publication number Publication date
GB467735A (en) 1937-06-22

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