AU8539975A - Compasses - Google Patents
CompassesInfo
- Publication number
- AU8539975A AU8539975A AU85399/75A AU8539975A AU8539975A AU 8539975 A AU8539975 A AU 8539975A AU 85399/75 A AU85399/75 A AU 85399/75A AU 8539975 A AU8539975 A AU 8539975A AU 8539975 A AU8539975 A AU 8539975A
- Authority
- AU
- Australia
- Prior art keywords
- compasses
- 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
- G01C17/26—Observing the compass card or needle using electric pick-offs for transmission to final indicator, e.g. photocell
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Magnetic Variables (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7434195A FR2287681A1 (fr) | 1974-10-11 | 1974-10-11 | Compas magnetique numerique |
Publications (1)
Publication Number | Publication Date |
---|---|
AU8539975A true AU8539975A (en) | 1977-04-07 |
Family
ID=9143968
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU85399/75A Expired AU8539975A (en) | 1974-10-11 | 1975-10-02 | Compasses |
Country Status (4)
Country | Link |
---|---|
AU (1) | AU8539975A (de) |
DE (1) | DE2536140A1 (de) |
FR (1) | FR2287681A1 (de) |
SE (1) | SE7508624L (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3515978A1 (de) * | 1984-05-04 | 1985-11-07 | Canon K.K., Tokio/Tokyo | Bilderzeugungsvorrichtung |
EP0434884A1 (de) * | 1989-12-29 | 1991-07-03 | Detra Sa | Richtungsanzeigegerät |
US5526022A (en) | 1993-01-06 | 1996-06-11 | Virtual I/O, Inc. | Sourceless orientation sensor |
US5991085A (en) | 1995-04-21 | 1999-11-23 | I-O Display Systems Llc | Head-mounted personal visual display apparatus with image generator and holder |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2201559A (en) * | 1937-05-12 | 1940-05-21 | Sperry Gyroscope Co Inc | Earth induction compass |
US3634946A (en) * | 1969-02-10 | 1972-01-18 | Lundy Electronics & Syst Inc | Digital compass |
FR2146554A5 (de) * | 1971-07-19 | 1973-03-02 | France Etat |
-
1974
- 1974-10-11 FR FR7434195A patent/FR2287681A1/fr active Granted
-
1975
- 1975-07-30 SE SE7508624A patent/SE7508624L/xx unknown
- 1975-08-13 DE DE19752536140 patent/DE2536140A1/de active Pending
- 1975-10-02 AU AU85399/75A patent/AU8539975A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2536140A1 (de) | 1976-04-22 |
SE7508624L (sv) | 1976-04-12 |
FR2287681A1 (fr) | 1976-05-07 |
FR2287681B1 (de) | 1977-03-18 |
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