GB191210212A - Improvements in Instruments for Determining the Compass Course of a Ship from the True Course, or for Determining the True Course from the Compass Course. - Google Patents
Improvements in Instruments for Determining the Compass Course of a Ship from the True Course, or for Determining the True Course from the Compass Course.Info
- Publication number
- GB191210212A GB191210212A GB191210212DA GB191210212A GB 191210212 A GB191210212 A GB 191210212A GB 191210212D A GB191210212D A GB 191210212DA GB 191210212 A GB191210212 A GB 191210212A
- Authority
- GB
- United Kingdom
- Prior art keywords
- course
- pointer
- compass
- deviation
- variation
- 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
Landscapes
- Navigation (AREA)
Abstract
10,212. Trant, E. L. April 30. Adding and subtracting apparatus.-In apparatus for determining the compass course of a ship t from the true course, or vice-versa, means are provided for the correction of errors due to the earth's magnetism or variation and to the ship's magnetism or deviation. In one form a continuous band 5, passing over rollers and visible through a slot 2 in the casing 1, is graduated to represent the 360 degrees of a compass card, and is movable relatively to a fixed ' true course ' pointer 8. On the front of the casing is marked a variation scale 12 with its zero graduation opposite the pointer 8, and a double pointer 10, 11 is provided to transfer and add variation to the band reading. The pointer 10, 11 is mounted on a cursor 14 which slides in a slot in the side of the casing and is guided in slots 3, 4. The cursor 14 has marked thereon, in fixed relation to the pointer 10, 11, a scale 16 to represent the deviation and this scale is provided with a cursor 17 and pointer 18, 19 whereby the deviation is set, the final compass course being read on the band 5 by the pointer 18. The variation and deviation scales may be differently coloured for east and west graduations. In a modified form the continuous band and scales are replaced by a circular disk and corresponding scales.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB191210212T | 1912-04-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB191210212A true GB191210212A (en) | 1913-04-03 |
Family
ID=32640757
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB191210212D Expired GB191210212A (en) | 1912-04-30 | 1912-04-30 | Improvements in Instruments for Determining the Compass Course of a Ship from the True Course, or for Determining the True Course from the Compass Course. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB191210212A (en) |
-
1912
- 1912-04-30 GB GB191210212D patent/GB191210212A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Michelson | Experimental determination of the velocity of light: made at the US Naval Academy, Annapolis | |
GB342757A (en) | Improvements in or relating to measuring and indicating instruments | |
GB191210212A (en) | Improvements in Instruments for Determining the Compass Course of a Ship from the True Course, or for Determining the True Course from the Compass Course. | |
US2239959A (en) | Course converter for conveyances | |
US1755106A (en) | Meter for compressed gas | |
US2299444A (en) | Navigational computer | |
GB825228A (en) | Improvements in and relating to navigational calculating instruments | |
GB191322117A (en) | A Plotting Board for use in Manoeuvring Ships. | |
US946043A (en) | Navigator's calculating instrument. | |
US2026538A (en) | Noon interval calculator | |
US1490210A (en) | Meter | |
GB224258A (en) | Improved level | |
GB1094765A (en) | Improvements in or relating to linear measuring instruments | |
SU9089A1 (en) | Tool for counting the result of showing two measuring instruments | |
GB191506942A (en) | Trigonometrical Measuring Instrument. | |
US3320924A (en) | Measuring instrument | |
KMP et al. | PLANE SURVEYING | |
US1833345A (en) | Device for correcting for magnetic declination, deviation, and drift | |
GB142894A (en) | Improvements in or relating to gyro-compasses | |
GB357925A (en) | Improvements in drawing and like squares | |
GB199389A (en) | Improvements in instruments for determining the resultant of two vector quantities | |
GB263187A (en) | Improvements relating to electric repeating instruments or systems | |
GB136180A (en) | Range Calculator. | |
GB191128132A (en) | An Improved Tachymetric Calculator. | |
GB283346A (en) | Improvements in scales for angle measuring instruments |