GB323699A - Improvements in magnetic compasses - Google Patents

Improvements in magnetic compasses

Info

Publication number
GB323699A
GB323699A GB1232629A GB1232629A GB323699A GB 323699 A GB323699 A GB 323699A GB 1232629 A GB1232629 A GB 1232629A GB 1232629 A GB1232629 A GB 1232629A GB 323699 A GB323699 A GB 323699A
Authority
GB
United Kingdom
Prior art keywords
bowl
wires
pivot
card
diameter
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
GB1232629A
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 GB1232629A priority Critical patent/GB323699A/en
Publication of GB323699A publication Critical patent/GB323699A/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)
  • Mechanical Light Control Or Optical Switches (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

323,699. Field, M. B. April 20, 1929. Magnetic compasses.-In a quick acting, dead beat, liquid magnetic compass an annular card, of small diameter in relation to the diameter of the bowl, is supported by wires which are extended to bear damping blades operating in the liquid surrounding the card. These wires are bent downwards to clear a lubber wire attached to the bowl and the damping blades are generally about midway between the card and the bowl. The cover consists of a plano convex lens inclined to the horizontal. The annulus 1 is supported by wires 4 projecting radially outwards from the pivot carrying dome 5 and carrying the damping blades 3 which can be of other shapes besides that shown. The magnets 2 are circularly bent forming in effect interrupted rings with N and S poles at opposite ends of a diameter. The bends in the wires clear the lubber wire 7. To prevent displacement of the pivot the cup shaped member 12 surmounts the pivot and is sustained from the bowl 6 by a cross member 13. The bowl 6 is suspended in the housing 10 by resilient pads and an expansive chamber 9 allows for liquid expansion. The lens 8 gives a magnified image of the annulus visible over a wide angle. Specification 127,135 is referred to.
GB1232629A 1929-04-20 1929-04-20 Improvements in magnetic compasses Expired GB323699A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1232629A GB323699A (en) 1929-04-20 1929-04-20 Improvements in magnetic compasses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1232629A GB323699A (en) 1929-04-20 1929-04-20 Improvements in magnetic compasses

Publications (1)

Publication Number Publication Date
GB323699A true GB323699A (en) 1930-01-09

Family

ID=10002432

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1232629A Expired GB323699A (en) 1929-04-20 1929-04-20 Improvements in magnetic compasses

Country Status (1)

Country Link
GB (1) GB323699A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3594911A (en) * 1969-12-17 1971-07-27 Ritchie & Sons Inc E S Compass

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3594911A (en) * 1969-12-17 1971-07-27 Ritchie & Sons Inc E S Compass

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