GB799405A - Improvements in ships' compasses - Google Patents

Improvements in ships' compasses

Info

Publication number
GB799405A
GB799405A GB3169655A GB3169655A GB799405A GB 799405 A GB799405 A GB 799405A GB 3169655 A GB3169655 A GB 3169655A GB 3169655 A GB3169655 A GB 3169655A GB 799405 A GB799405 A GB 799405A
Authority
GB
United Kingdom
Prior art keywords
compass
binnacle
periscope
ring
magnets
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
GB3169655A
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.)
JOHN CALDER GILLIE
John Lilley & Gillie Ltd
SIDNEY KENNEDY
Original Assignee
JOHN CALDER GILLIE
John Lilley & Gillie Ltd
SIDNEY KENNEDY
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 JOHN CALDER GILLIE, John Lilley & Gillie Ltd, SIDNEY KENNEDY filed Critical JOHN CALDER GILLIE
Priority to GB3169655A priority Critical patent/GB799405A/en
Publication of GB799405A publication Critical patent/GB799405A/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)
  • Telescopes (AREA)

Abstract

799,405. Magnetic compasses. GILLIE. J. C., KENNEDY, S., and LILLEY & GILLIE, Ltd., J. Oct. 22, 1956 [Nov. 5, 1955], No. 31696/55 Class 97(2) In a binnacle type compass of the kind wherein a periscope tube is provided on the underside of the binnacle to allow the compass (e.g. the lubber line and a portion of the compass card) to be viewed from below, the heeling magnet comprises a hollow cylinder or ring having holes at spaced intervals around its wall to receive magnets, the hollow cylinder or ring being positioned so that its bore affords a clear view of the compass. As shown, the binnacle comprises a non-magnetic cylinder 10 containing fore and aft correcting magnets and thwartship magnets 11 and the quadrantal spheres and Flinders bar. The binnacle assembly, having a transparent top 26 and containing a compass 12 having a shadow pin 27 to facilitate the taking of sun azimuths, is secured above a hole 13 in the wheelhouse roof 14 by an annular plate 15. A flanged cylinder 16 located in the hole 13 is provided with equally spaced axial bores each adapted to receive a cylindrical bar magnet 17. The ring 19 supports a magnifying lens and periscope assembly 20, 21, the periscope tube carrying an adjustable mirror 22 having locking means 25 to permit the compass card being viewed in the wheelhouse. A sighting means is attached to the periscope tube either above or below the mirror, and the tube is rotatable about its vertical axis.
GB3169655A 1955-11-05 1955-11-05 Improvements in ships' compasses Expired GB799405A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3169655A GB799405A (en) 1955-11-05 1955-11-05 Improvements in ships' compasses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3169655A GB799405A (en) 1955-11-05 1955-11-05 Improvements in ships' compasses

Publications (1)

Publication Number Publication Date
GB799405A true GB799405A (en) 1958-08-06

Family

ID=10327051

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3169655A Expired GB799405A (en) 1955-11-05 1955-11-05 Improvements in ships' compasses

Country Status (1)

Country Link
GB (1) GB799405A (en)

Similar Documents

Publication Publication Date Title
US1474394A (en) Magnetic compass
GB799405A (en) Improvements in ships' compasses
GB308584A (en)
US3261103A (en) Magnetic compass
GB1227130A (en)
US2638683A (en) Magnetic compass
US2558934A (en) Method for correcting magnetic compasses on carriers
GB624083A (en) Improvements in or relating to magnetic azimuthal direction-indicating apparatus
GB991531A (en) Mounting means for interchangeable magnetic compass
US2424254A (en) Device for determining compass errors
GB980531A (en) Levelling instrument
GB1095966A (en) Magnetic compass
GB554244A (en) Improvements in or relating to compensating means for magnetic compasses
GB1149167A (en) Compass
GB1422552A (en) Magnetic compasses
GB589901A (en) An instrument or device for use in navigational or survey work or instruction
US2971428A (en) Great circle guide
US2243512A (en) Navigating instrument
GB551880A (en) Improvements in or relating to observing or sighting devices
US2309269A (en) Compensating means for magnetic compasses
GB1439079A (en) Navigation instrument
GB1095817A (en) Meridian seeking gyroscopic instrument
GB1199197A (en) Improvements in Terrestrial Globes
Johnston Magnetic work at sea
BOICHUK et al. Errors of an inertial navigation system with a gyrohorizon compass and a directional gyroscope(Explicit expressions for inertial navigation system errors analysis derived as function of plant coordinates, gyrocompass fluctuations, external moments and initial conditions)