GB191698A - Improvements in magnetic compasses for marine or aerial navigation - Google Patents

Improvements in magnetic compasses for marine or aerial navigation

Info

Publication number
GB191698A
GB191698A GB16588/22A GB1658822A GB191698A GB 191698 A GB191698 A GB 191698A GB 16588/22 A GB16588/22 A GB 16588/22A GB 1658822 A GB1658822 A GB 1658822A GB 191698 A GB191698 A GB 191698A
Authority
GB
United Kingdom
Prior art keywords
compass
pointer
card
tube
marine
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
GB16588/22A
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
Publication of GB191698A publication Critical patent/GB191698A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C17/00Compasses; 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)
  • Emergency Lowering Means (AREA)

Abstract

191,698. Doignon, A. L. Jan. 12, 1922, [Convention date]. Void [Published under Sect. 91 of the Act]. Mariners' and aeronautical compasses.-In a liquid compass, for use in marine and aerial navigation, expansion and contraction of the liquid are counteracted by the provision of an annular air cushion around a downwardly-projecting tube T, and air bubbles which form beneath the glass G<1> are transferred to the annular air space by suitable manipulation of the container. A course-setting pointer A is adjustable about the pivotal axis of the compass-oard P as follows. A tube g, mounted for sliding vertically without turning, is adapted to be raised by operating a handle on a shaft a carrying a crank arm m engaging a groove r formed on the tube. The tube lifts the compass-card from its pivot without turning it until the upper end of a socket on the card abuts on a centre piece on the glass G'. While the compass-card is thus held stationary a milled knob n is turned to operate a spindle L carrying at its lower end a finger c which engages a finger i on the pointer A to adjust the pointer. The handle is then released to lower the compass-card on to its pivot. The. end of the pointer A and the lubber line are rendered self-luminous.
GB16588/22A 1922-01-12 1922-06-15 Improvements in magnetic compasses for marine or aerial navigation Expired GB191698A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR191698X 1922-01-12

Publications (1)

Publication Number Publication Date
GB191698A true GB191698A (en) 1923-07-26

Family

ID=8879108

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16588/22A Expired GB191698A (en) 1922-01-12 1922-06-15 Improvements in magnetic compasses for marine or aerial navigation

Country Status (1)

Country Link
GB (1) GB191698A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184267A (en) * 1977-06-07 1980-01-22 Rustan Lenberg Compass having a course directing pointer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184267A (en) * 1977-06-07 1980-01-22 Rustan Lenberg Compass having a course directing pointer

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