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GB139920A - Improvements in and relating to magnetic compasses - Google Patents

Improvements in and relating to magnetic compasses

Info

Publication number
GB139920A
GB139920A GB931519A GB931519A GB139920A GB 139920 A GB139920 A GB 139920A GB 931519 A GB931519 A GB 931519A GB 931519 A GB931519 A GB 931519A GB 139920 A GB139920 A GB 139920A
Authority
GB
United Kingdom
Prior art keywords
cup
secured
springs
bowl
mass
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
GB931519A
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
Priority to GB931519A priority Critical patent/GB139920A/en
Publication of GB139920A publication Critical patent/GB139920A/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)
  • Vibration Prevention Devices (AREA)
  • Pivots And Pivotal Connections (AREA)

Abstract

139,920. Gardiner, W. C. April 11, 1919. Mariners' compasses.-The compass-bowl pivot member is so mounted as to be resilient both axially and laterally. In the form shown in Fig. 1, the mounting comprises an open helical spring 1 suporting the cup 3 and secured at 5 to the bowl 2; this spring is surrounded by a closed helical spring 4 also secured to the member 5 and having a bush 6 through which the spring 1 passes. Attached to the cup 3 is a mass 7 so arranged that the centre of gravity of the mass and cup is approximately at the point of the pivot 8. A light framework 9, which may be secured to the bowl by springs 10, is also secured to the cup 3; this framework may carry a light annular cylinder 14, and its side-members may be used as lubber-lines. The springs and the mass 7 are so adjusted that vibration does not produce relative movements of the two pivot members. The springs 1, 4 may be replaced by a single cylindrical or conical helix.
GB931519A 1919-04-11 1919-04-11 Improvements in and relating to magnetic compasses Expired GB139920A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB931519A GB139920A (en) 1919-04-11 1919-04-11 Improvements in and relating to magnetic compasses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB931519A GB139920A (en) 1919-04-11 1919-04-11 Improvements in and relating to magnetic compasses

Publications (1)

Publication Number Publication Date
GB139920A true GB139920A (en) 1920-03-18

Family

ID=9869597

Family Applications (1)

Application Number Title Priority Date Filing Date
GB931519A Expired GB139920A (en) 1919-04-11 1919-04-11 Improvements in and relating to magnetic compasses

Country Status (1)

Country Link
GB (1) GB139920A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2422960A (en) * 1944-09-26 1947-06-24 Autoflight Corp Elimination of vibration errors in magnetic compasses and the like
US2487809A (en) * 1944-09-28 1949-11-15 George W Hoover Combined attitude and directional instrument for aircraft
US2653390A (en) * 1949-01-05 1953-09-29 White Ezekiel Field Gun compass
US3234657A (en) * 1957-04-29 1966-02-15 Walter E Hull Magnetic compass

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2422960A (en) * 1944-09-26 1947-06-24 Autoflight Corp Elimination of vibration errors in magnetic compasses and the like
US2487809A (en) * 1944-09-28 1949-11-15 George W Hoover Combined attitude and directional instrument for aircraft
US2653390A (en) * 1949-01-05 1953-09-29 White Ezekiel Field Gun compass
US3234657A (en) * 1957-04-29 1966-02-15 Walter E Hull Magnetic compass

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