GB146613A - Improvements in and relating to apparatus for use in solving nautical problems or plane and spherical trigonometry - Google Patents
Improvements in and relating to apparatus for use in solving nautical problems or plane and spherical trigonometryInfo
- Publication number
- GB146613A GB146613A GB913919A GB913919A GB146613A GB 146613 A GB146613 A GB 146613A GB 913919 A GB913919 A GB 913919A GB 913919 A GB913919 A GB 913919A GB 146613 A GB146613 A GB 146613A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solving
- triangle
- angles
- nautical
- spherical
- 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
- G01C21/02—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by astronomical means
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Astronomy & Astrophysics (AREA)
- Automation & Control Theory (AREA)
- General Physics & Mathematics (AREA)
- Instructional Devices (AREA)
Abstract
146,613. Arimitsu, T. April 10, 1919. Spherical and plane trigonometry calculators for use, for example, in nautical astronomy, consist of a quadrant comprising a graduated arc a and two arms b, c at right-angles, a bar d adapted to slide on the surface and to pivot about the centre l of the arc, and a, pointer f mounted at right-angles to and adapted to slide along the bar d. The arm c is fitted with a sliding scale k in order to ascertain the distance between the centre of the are and a point j which serves as a base length when performing calculations. The Specification describes the method of solving, with the apparatus, a spherical triangle so as to obtain an angle from one of the remaining angles and the sides opposite both, for which purpose the triangle is assumed to be divided by means of a perpendicular into two triangles, and the calculation proceeds in two stages, one for each rightanglecl triangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB913919A GB146613A (en) | 1919-04-10 | 1919-04-10 | Improvements in and relating to apparatus for use in solving nautical problems or plane and spherical trigonometry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB913919A GB146613A (en) | 1919-04-10 | 1919-04-10 | Improvements in and relating to apparatus for use in solving nautical problems or plane and spherical trigonometry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB146613A true GB146613A (en) | 1920-07-12 |
Family
ID=9866109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB913919A Expired GB146613A (en) | 1919-04-10 | 1919-04-10 | Improvements in and relating to apparatus for use in solving nautical problems or plane and spherical trigonometry |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB146613A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068312A (en) * | 2019-05-08 | 2019-07-30 | 中国人民解放军火箭军工程大学 | A kind of digital zenith instrument localization method based on spherical triangle |
-
1919
- 1919-04-10 GB GB913919A patent/GB146613A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068312A (en) * | 2019-05-08 | 2019-07-30 | 中国人民解放军火箭军工程大学 | A kind of digital zenith instrument localization method based on spherical triangle |
| CN110068312B (en) * | 2019-05-08 | 2021-04-06 | 中国人民解放军火箭军工程大学 | Digital zenith instrument positioning method based on spherical triangle |
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