GB665159A - Improvements in or relating to navigational devices - Google Patents
Improvements in or relating to navigational devicesInfo
- Publication number
- GB665159A GB665159A GB912649A GB912649A GB665159A GB 665159 A GB665159 A GB 665159A GB 912649 A GB912649 A GB 912649A GB 912649 A GB912649 A GB 912649A GB 665159 A GB665159 A GB 665159A
- Authority
- GB
- United Kingdom
- Prior art keywords
- film
- curves
- chart
- marked
- map
- 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)
- Drawing Aids And Blackboards (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
665,159. Navigational instruments. KELVIN & HUGHES, Ltd. April 4. 1950 [April 4, 1949], No. 9126/49. Class 97 (iii). A navigational device whereby a navigator can quickly locate his position after taking sextant readings from two or more heavenly bodies comprises a transparent film or strip provided with a straight centre-line 10 and on which is provided projections of curves 11 of approximately circular shape of equal altitudes on stereographic projections or other projections of like qualities to the scale of the map or chart being employed for navigation, the centres of the curves 11 being on the line 10. The film or strip is adapted for adjustment around an axis 13 perpendicular to the chart and for permitting the navigator to trace the appropriate curve on the chart whilst the film or strip is in position to indicate the curve on the chart. As shown, the curves 11 are in the form of slots so that a pencil can trace them. Alternatively the curves may be in the form of lines, means being provided to support the film at some distance above the map and for moving the film around the said perpendicular axis, and light means being provided for projecting the lines on to the map. The centre line 10 is marked with a scale to indicate nautical miles and a protractor 12 is marked on the film, and has a central protractor hole at 13. The edges of the film are marked off in degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB912649A GB665159A (en) | 1949-04-04 | 1949-04-04 | Improvements in or relating to navigational devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB912649A GB665159A (en) | 1949-04-04 | 1949-04-04 | Improvements in or relating to navigational devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB665159A true GB665159A (en) | 1952-01-16 |
Family
ID=9865860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB912649A Expired GB665159A (en) | 1949-04-04 | 1949-04-04 | Improvements in or relating to navigational devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB665159A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2131345A (en) * | 1982-12-03 | 1984-06-20 | John Stanley Holden | Cutter or scribe jig |
| GB2284700A (en) * | 1993-12-09 | 1995-06-14 | Rod Ward | Map marker and navigational aid |
-
1949
- 1949-04-04 GB GB912649A patent/GB665159A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2131345A (en) * | 1982-12-03 | 1984-06-20 | John Stanley Holden | Cutter or scribe jig |
| GB2284700A (en) * | 1993-12-09 | 1995-06-14 | Rod Ward | Map marker and navigational aid |
| GB2284700B (en) * | 1993-12-09 | 1997-08-06 | Rod Ward | Rodz mapmarker and navigation aid |
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