GB494997A - Improvements in nautical course correctors - Google Patents
Improvements in nautical course correctorsInfo
- Publication number
- GB494997A GB494997A GB3231337A GB3231337A GB494997A GB 494997 A GB494997 A GB 494997A GB 3231337 A GB3231337 A GB 3231337A GB 3231337 A GB3231337 A GB 3231337A GB 494997 A GB494997 A GB 494997A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ring
- plate
- graduation
- bring
- adjusted
- 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
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/20—Instruments for performing navigational calculations
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Drawing Aids And Blackboards (AREA)
Abstract
494,997. Navigational plotting-instruments. FLADMARK, T. Nov. 24, 1937, No. 32313. [Class 97 (iii)] An instrument for plotting and reading off bearings comprises a plate 1, 2, having a circular opening around which rotate a ring 7, carrying a guide rod 10 for a sliding ruler 11, 12, and a ring 8. The plate is also provided with a stationary scale 17 and a graduated arc 20 movable in a peripheral direction. In use, the arc 20 is adjusted to bring the central zero graduation 21 opposite the graduation on the scale 17 corresponding to the magnetic variation. The graduated ring 8 is then adjusted to bring the 180‹ graduation opposite the graduation on the arc 20 corresponding to the deviation of the compass. The instrument is applied to a chart with the edge 6 of the plate 2 perpendicular to the meridian line and the ring 7 is adjusted to bring the diameter 13, 14 parallel to the desired course on the chart. The mark 13 then indicates the compass course corrected for variation and deviation on the ring 8 and the true course on a scale 23 marked on the plate I and exposed by openings 24, 25 in the ring 7. The foot piece 2 comprises several parts 3, 4, 5, 6 which are hinged together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3231337A GB494997A (en) | 1937-11-24 | 1937-11-24 | Improvements in nautical course correctors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3231337A GB494997A (en) | 1937-11-24 | 1937-11-24 | Improvements in nautical course correctors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB494997A true GB494997A (en) | 1938-11-04 |
Family
ID=10336652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3231337A Expired GB494997A (en) | 1937-11-24 | 1937-11-24 | Improvements in nautical course correctors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB494997A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319035A (en) * | 2014-10-30 | 2015-01-28 | 成都峰达科技有限公司 | Convenient and practical grading ring |
-
1937
- 1937-11-24 GB GB3231337A patent/GB494997A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319035A (en) * | 2014-10-30 | 2015-01-28 | 成都峰达科技有限公司 | Convenient and practical grading ring |
| CN104319035B (en) * | 2014-10-30 | 2016-08-24 | 福建逢兴机电设备有限公司 | A kind of convenient and practical grading ring |
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