FR799250A - Improvements to magnetic compasses - Google Patents
Improvements to magnetic compassesInfo
- Publication number
- FR799250A FR799250A FR799250DA FR799250A FR 799250 A FR799250 A FR 799250A FR 799250D A FR799250D A FR 799250DA FR 799250 A FR799250 A FR 799250A
- Authority
- FR
- France
- Prior art keywords
- magnetic compasses
- compasses
- magnetic
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Toys (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US467735XA | 1934-12-07 | 1934-12-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR799250A true FR799250A (en) | 1936-06-09 |
Family
ID=21945319
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR799250D Expired FR799250A (en) | 1934-12-07 | 1935-12-05 | Improvements to magnetic compasses |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR799250A (en) |
GB (1) | GB467735A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2316579A1 (en) * | 1975-06-17 | 1977-01-28 | Laitram Corp | REMOTE READING MAGNETIC COMPASS |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108104798B (en) * | 2017-03-10 | 2021-09-21 | 苏州弘开传感科技有限公司 | Tunnel positioning instrument based on magnetic field principle and using method thereof |
-
1935
- 1935-11-22 GB GB32430/35A patent/GB467735A/en not_active Expired
- 1935-12-05 FR FR799250D patent/FR799250A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2316579A1 (en) * | 1975-06-17 | 1977-01-28 | Laitram Corp | REMOTE READING MAGNETIC COMPASS |
Also Published As
Publication number | Publication date |
---|---|
GB467735A (en) | 1937-06-22 |
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