GB756117A - Improvements in or relating to navigational course finders - Google Patents
Improvements in or relating to navigational course findersInfo
- Publication number
- GB756117A GB756117A GB2537954A GB2537954A GB756117A GB 756117 A GB756117 A GB 756117A GB 2537954 A GB2537954 A GB 2537954A GB 2537954 A GB2537954 A GB 2537954A GB 756117 A GB756117 A GB 756117A
- Authority
- GB
- United Kingdom
- Prior art keywords
- upper member
- course
- parallel
- parallel lines
- finders
- 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)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
756,117. Protractors. HARRIES, B. T. Sept. 1, 1954, No. 25379/54. Class 97 (3). A navigational course finder comprises a base member 1 pivoted at 16 to a transparent upper member 8 which bears one or more circular scales of degrees and a series of parallel lines 13 running parallel to the zero angular marking or alternatively or additionally a series of parallel lines 14 running at right angles to the zero angular marking, the base member having a reading line through the pivot. The latter line may be one such as 5, parallel to the straight edge 2, and there may be a second reading line 7, perpendicular to the first. The upper member may have a representation of the compass points. In use, the instrument is laid on a chart 17 with the straight edge 2 along the course AB, and the upper member is rotated so that one of the parallel lines 13 coincides with one of the meridian lines 18. The direction of the course is then read off on the upper member. Specification 677,346 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2537954A GB756117A (en) | 1954-09-01 | 1954-09-01 | Improvements in or relating to navigational course finders |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2537954A GB756117A (en) | 1954-09-01 | 1954-09-01 | Improvements in or relating to navigational course finders |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB756117A true GB756117A (en) | 1956-08-29 |
Family
ID=10226720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2537954A Expired GB756117A (en) | 1954-09-01 | 1954-09-01 | Improvements in or relating to navigational course finders |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB756117A (en) |
-
1954
- 1954-09-01 GB GB2537954A patent/GB756117A/en not_active Expired
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