DE298455C - - Google Patents
Info
- Publication number
- DE298455C DE298455C DENDAT298455D DE298455DA DE298455C DE 298455 C DE298455 C DE 298455C DE NDAT298455 D DENDAT298455 D DE NDAT298455D DE 298455D A DE298455D A DE 298455DA DE 298455 C DE298455 C DE 298455C
- Authority
- DE
- Germany
- Prior art keywords
- ring
- north
- circle
- needle
- division
- 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
- 238000005259 measurement Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 3
- 230000008676 import Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41G—WEAPON SIGHTS; AIMING
- F41G3/00—Aiming or laying means
- F41G3/14—Indirect aiming means
- F41G3/16—Sighting devices adapted for indirect laying of fire
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C1/00—Measuring angles
-
- 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)
- General Engineering & Computer Science (AREA)
- Eye Examination Apparatus (AREA)
Publications (1)
Publication Number | Publication Date |
---|---|
DE298455C true DE298455C (enrdf_load_stackoverflow) |
Family
ID=552660
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT298455D Active DE298455C (enrdf_load_stackoverflow) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE298455C (enrdf_load_stackoverflow) |
-
0
- DE DENDAT298455D patent/DE298455C/de active Active
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