GB191698A - Improvements in magnetic compasses for marine or aerial navigation - Google Patents
Improvements in magnetic compasses for marine or aerial navigationInfo
- 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
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)
- 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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4184267A (en) * | 1977-06-07 | 1980-01-22 | Rustan Lenberg | Compass having a course directing pointer |
-
1922
- 1922-06-15 GB GB16588/22A patent/GB191698A/en not_active Expired
Cited By (1)
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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