FR888142A - Mode of illumination of the opaque roses of the magnetic navigation compasses - Google Patents
Mode of illumination of the opaque roses of the magnetic navigation compassesInfo
- Publication number
- FR888142A FR888142A FR888142DA FR888142A FR 888142 A FR888142 A FR 888142A FR 888142D A FR888142D A FR 888142DA FR 888142 A FR888142 A FR 888142A
- Authority
- FR
- France
- Prior art keywords
- roses
- compasses
- opaque
- illumination
- mode
- 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
- 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
- G01C17/20—Observing the compass card or needle
- G01C17/24—Illumination
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR888142T | 1942-07-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR888142A true FR888142A (en) | 1943-12-03 |
Family
ID=9376590
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR888142D Expired FR888142A (en) | 1942-07-16 | 1942-07-16 | Mode of illumination of the opaque roses of the magnetic navigation compasses |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR888142A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2738412A (en) * | 1952-11-07 | 1956-03-13 | Nye S Spencer | Compass illuminating assembly |
-
1942
- 1942-07-16 FR FR888142D patent/FR888142A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2738412A (en) * | 1952-11-07 | 1956-03-13 | Nye S Spencer | Compass illuminating assembly |
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