DE297648C - - Google Patents
Info
- Publication number
- DE297648C DE297648C DENDAT297648D DE297648DA DE297648C DE 297648 C DE297648 C DE 297648C DE NDAT297648 D DENDAT297648 D DE NDAT297648D DE 297648D A DE297648D A DE 297648DA DE 297648 C DE297648 C DE 297648C
- Authority
- DE
- Germany
- Prior art keywords
- prism
- bussole
- line
- rulers
- hollow
- 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.)
- Active
Links
- 241000182341 Cubitermes group Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
- G01C17/02—Magnetic compasses
- G01C17/04—Magnetic compasses with north-seeking magnetic elements, e.g. needles
- G01C17/10—Comparing observed direction with north indication
- G01C17/12—Comparing observed direction with north indication by sighting means, e.g. for surveyors' compasses
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Lenses (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE297648C true DE297648C (Direct) |
Family
ID=551926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT297648D Active DE297648C (Direct) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE297648C (Direct) |
-
0
- DE DENDAT297648D patent/DE297648C/de active Active
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