GB149241A - Improvements in magnetic compasses - Google Patents

Improvements in magnetic compasses

Info

Publication number
GB149241A
GB149241A GB21021/20A GB2102120A GB149241A GB 149241 A GB149241 A GB 149241A GB 21021/20 A GB21021/20 A GB 21021/20A GB 2102120 A GB2102120 A GB 2102120A GB 149241 A GB149241 A GB 149241A
Authority
GB
United Kingdom
Prior art keywords
graduations
card
liquid
aircraft
sets
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
GB21021/20A
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.)
CHARLES HERBERT COLVIN
Original Assignee
CHARLES HERBERT COLVIN
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 CHARLES HERBERT COLVIN filed Critical CHARLES HERBERT COLVIN
Publication of GB149241A publication Critical patent/GB149241A/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)
  • Toys (AREA)

Abstract

149,241. Colvin, C. H. July 19, 1919, [Convention date]. Magnetic compasses.-In a liquid compass, particularly for use on aircraft, the card is provided with two sets of graduations one set 16 being on the upper surface and the other set 15 on the cylindrical surface of the card, and the two sets of graduations being so arranged that the north point of the one set coincides with the south point of the other. The graduations 15, 16 are read against diametrically opposite lubber lines 17, 18 respectively so that either reading indicates the course of the aircraft. The card is mounted on a pivot 14 in a liquid-containing bowl, the graduations 15, 16 being respectively read through the transparent side 9 and the transparent cover 10. The liquid in the bowl serves to damp out erratic movements of the card.
GB21021/20A 1919-07-19 1920-07-12 Improvements in magnetic compasses Expired GB149241A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US149241XA 1919-07-19 1919-07-19

Publications (1)

Publication Number Publication Date
GB149241A true GB149241A (en) 1922-01-12

Family

ID=21768574

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21021/20A Expired GB149241A (en) 1919-07-19 1920-07-12 Improvements in magnetic compasses

Country Status (1)

Country Link
GB (1) GB149241A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995006233A1 (en) * 1993-08-24 1995-03-02 Diodoro Soto Garcia Manual compass-clinometer
EP2572161A4 (en) * 2010-05-17 2016-05-11 Paul Chapman An improved magnetic compass

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995006233A1 (en) * 1993-08-24 1995-03-02 Diodoro Soto Garcia Manual compass-clinometer
EP2572161A4 (en) * 2010-05-17 2016-05-11 Paul Chapman An improved magnetic compass

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