GB570547A - Improvements in or relating to magnetic compasses - Google Patents

Improvements in or relating to magnetic compasses

Info

Publication number
GB570547A
GB570547A GB1710043A GB1710043A GB570547A GB 570547 A GB570547 A GB 570547A GB 1710043 A GB1710043 A GB 1710043A GB 1710043 A GB1710043 A GB 1710043A GB 570547 A GB570547 A GB 570547A
Authority
GB
United Kingdom
Prior art keywords
scale
compass
aeroplane
pointer
cardinal points
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
GB1710043A
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.)
ROLAND EDWARD LESTER
Original Assignee
ROLAND EDWARD LESTER
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 ROLAND EDWARD LESTER filed Critical ROLAND EDWARD LESTER
Priority to GB1710043A priority Critical patent/GB570547A/en
Publication of GB570547A publication Critical patent/GB570547A/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)
  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

570,547. Magnetic compasses. LESTER, R.E. Oct. 18, 1943, No. 17100. [Class 97 (ii)] In order to correct for variation and deviation, a magnetic compass, mounted on an aeroplane is provided with a compass scale of elastic or flexible material which is capable of expansion and contraction and means are provided at predetermined points for so expanding and contracting it. A fixed flange 5 having marked thereon the eight cardinal points is provided and around this is mounted in a slightly stretched state an elastic annular compass scale 6 seated upon, and operatively connected with, eight supports 7 arranged to be circumferentially adjusted by screws 9 to expand or contract the compass scale 6 at those parts. A support 13 having a scale 14 is also provided to carry a pointer 12 adjustable by a screw 16 and to act as a variable lubber line. To set the scale, the variation of the district is set on the auxiliary scale 14 by moving the pointer. The aeroplane is headed to true north and the rotating ring is turned to bring the parallel wires 18 parallel to the needle 1 and the support 7 is adjusted to bring the zero of the scale 6 immediately under the pointer 12. The aeroplane is then headed successively to the other cardinal points and the process repeated so that the compass scale is corrected at each of these cardinal points.
GB1710043A 1943-10-18 1943-10-18 Improvements in or relating to magnetic compasses Expired GB570547A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1710043A GB570547A (en) 1943-10-18 1943-10-18 Improvements in or relating to magnetic compasses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1710043A GB570547A (en) 1943-10-18 1943-10-18 Improvements in or relating to magnetic compasses

Publications (1)

Publication Number Publication Date
GB570547A true GB570547A (en) 1945-07-11

Family

ID=10089249

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1710043A Expired GB570547A (en) 1943-10-18 1943-10-18 Improvements in or relating to magnetic compasses

Country Status (1)

Country Link
GB (1) GB570547A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2293239A (en) * 1994-09-15 1996-03-20 Fredun Ruston Correction of errors in a magnetic compass

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2293239A (en) * 1994-09-15 1996-03-20 Fredun Ruston Correction of errors in a magnetic compass
GB2293239B (en) * 1994-09-15 1999-03-10 Fredun Ruston True magnetic compass

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