GB509940A - Improvements in or relating to magnetic compass devices - Google Patents

Improvements in or relating to magnetic compass devices

Info

Publication number
GB509940A
GB509940A GB302438A GB302438A GB509940A GB 509940 A GB509940 A GB 509940A GB 302438 A GB302438 A GB 302438A GB 302438 A GB302438 A GB 302438A GB 509940 A GB509940 A GB 509940A
Authority
GB
United Kingdom
Prior art keywords
centre
float
magnetic
gravity
relating
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
GB302438A
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.)
WILLIAM JOHN NORTHOVER
Original Assignee
WILLIAM JOHN NORTHOVER
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 WILLIAM JOHN NORTHOVER filed Critical WILLIAM JOHN NORTHOVER
Priority to GB302438A priority Critical patent/GB509940A/en
Publication of GB509940A publication Critical patent/GB509940A/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)
  • Level Indicators Using A Float (AREA)

Abstract

509,940. Magnetic compasses. NORTHOVER, W. J. Jan. 31, 1938, No. 3024. [Class 97 (ii)] The universally supported sensitive element of a liquid magnetic compass has its centre of gravity above the point of support and the centre of buoyancy of its float well above the centre of gravity. As shown, the magnetic needles 4 are universally mounted on the bottom weight of the float by means of gimbals 2, 3, and the movable system is retained on the pivot pin 6 by projections 6A, 6B. The compass may be read at the side from the card 5 and from above by means of the damping filaments 7, which may be associated with a grid steering system The float may be shaped at the top to form a pointer for indicating inclinations, a mirror being placed over the top glass of the casing G to facilitate reading.
GB302438A 1938-01-31 1938-01-31 Improvements in or relating to magnetic compass devices Expired GB509940A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB302438A GB509940A (en) 1938-01-31 1938-01-31 Improvements in or relating to magnetic compass devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB302438A GB509940A (en) 1938-01-31 1938-01-31 Improvements in or relating to magnetic compass devices

Publications (1)

Publication Number Publication Date
GB509940A true GB509940A (en) 1939-07-25

Family

ID=9750521

Family Applications (1)

Application Number Title Priority Date Filing Date
GB302438A Expired GB509940A (en) 1938-01-31 1938-01-31 Improvements in or relating to magnetic compass devices

Country Status (1)

Country Link
GB (1) GB509940A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3790882A (en) * 1972-11-30 1974-02-05 Coniagas Research Inc Dip magnet magnetometer having a damped pendulous support and temperature compensation
RU2748648C1 (en) * 2020-11-18 2021-05-28 Александр Борисович Маркин Inverted pendulum system with hypertrophied period of oscillation to determine angle of deviation from horizontal plane

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3790882A (en) * 1972-11-30 1974-02-05 Coniagas Research Inc Dip magnet magnetometer having a damped pendulous support and temperature compensation
RU2748648C1 (en) * 2020-11-18 2021-05-28 Александр Борисович Маркин Inverted pendulum system with hypertrophied period of oscillation to determine angle of deviation from horizontal plane

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