GB663589A - Improvements in or relating to magnetic compass - Google Patents

Improvements in or relating to magnetic compass

Info

Publication number
GB663589A
GB663589A GB1775449A GB1775449A GB663589A GB 663589 A GB663589 A GB 663589A GB 1775449 A GB1775449 A GB 1775449A GB 1775449 A GB1775449 A GB 1775449A GB 663589 A GB663589 A GB 663589A
Authority
GB
United Kingdom
Prior art keywords
damping element
bearings
support
spindle
magnet
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
GB1775449A
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.)
Reece Corp
Original Assignee
Reece Corp
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 Reece Corp filed Critical Reece Corp
Priority to GB1775449A priority Critical patent/GB663589A/en
Publication of GB663589A publication Critical patent/GB663589A/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)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

663,589. Magnetic compasses. REECE CORPORATION. July 5,1949, No. 17754/49. Class 97 (ii). A magnetic compass comprises a support 10, a magnet element 30, 31 and an eddy-current damping element 15, 16, 17, the magnet element being pivotally mounted by bearings 48 on spindle 18 for free rotation relatively to the support 10 and the damping element being pivotally mounted by bearings 24 for free rotation relatively to both the support and the magnet element. Preferably the magnet element and damping element. pivot axes are coaxial, being constituted, as shown, by a single spindle 18. A limited amount of clearance may be provided between the bearings 24, 48 respectively, and the spindle 18. Another embodiment is described suitable for aircraft and having a side-reading compass-card. In both embodiments the freedom of movement about the pivot axis and the inertia of the damping element is such as to resist the tendency for the damping element to rotate in space and thereby to prevent the tendency for the magnetic elements to be moved away from their normal position by oscillatory movements of the damping element.
GB1775449A 1949-07-05 1949-07-05 Improvements in or relating to magnetic compass Expired GB663589A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1775449A GB663589A (en) 1949-07-05 1949-07-05 Improvements in or relating to magnetic compass

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1775449A GB663589A (en) 1949-07-05 1949-07-05 Improvements in or relating to magnetic compass

Publications (1)

Publication Number Publication Date
GB663589A true GB663589A (en) 1951-12-27

Family

ID=10100639

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1775449A Expired GB663589A (en) 1949-07-05 1949-07-05 Improvements in or relating to magnetic compass

Country Status (1)

Country Link
GB (1) GB663589A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110954079A (en) * 2019-12-19 2020-04-03 中国电建集团华东勘测设计研究院有限公司 Three-dimensional geological compass and measuring method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110954079A (en) * 2019-12-19 2020-04-03 中国电建集团华东勘测设计研究院有限公司 Three-dimensional geological compass and measuring method
CN110954079B (en) * 2019-12-19 2023-06-30 中国电建集团华东勘测设计研究院有限公司 Three-dimensional geological compass and measuring method

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