GB539817A - Improvements in or relating to direction indicating instruments - Google Patents
Improvements in or relating to direction indicating instrumentsInfo
- Publication number
- GB539817A GB539817A GB339240A GB339240A GB539817A GB 539817 A GB539817 A GB 539817A GB 339240 A GB339240 A GB 339240A GB 339240 A GB339240 A GB 339240A GB 539817 A GB539817 A GB 539817A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- phase
- secondary winding
- transformer
- earth
- 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
- G01C17/28—Electromagnetic compasses
- G01C17/30—Earth-inductor compasses
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Gyroscopes (AREA)
Abstract
539,817. Earth-inductor compasses; phasedifference measurements. SCOPHONY, Ltd., WIKKENHAUSER, G., and JONES, P. L. F. Feb. 23, 1940, No. 3392. [Class 40 (i)] In an earth-inductor compass in which the phase of the voltage generated in a coil rotating in the earth's field is compared with that generated by a generator rotating synchronously therewith, the generated current is applied to the rotor coil of the phase indicator through a transformer the secondary winding of which rotates with and is connected to the rotor coil. On the vertical shaft 1, Fig. 1, of a motor 2 is a permanent magnet 3 which generates three-phase currents in windings 4, 5, 6, the phase of these currents being independent of the movement of the vehicle to which the windings are fixed. On the shaft 1 are also fixed an earth-inductor coil 7 and a coil 8 connected in series therewith. The coil 8 forms the primary winding of a transformer having a fixed secondary winding 9. The iron core of the transformer is formed by a part of the shaft 1, the magnetic circuit being completed by a stationary outer frame 10. Current from the stationary secondary winding 9 is fed after amplification if necessary, to the phase indicator shown in Fig. 2. This consists of a second transformer having a rotatable secondary winding 11 and a stationary primary winding 12, to which is fed the current from the winding 9, Fig. 1. The secondary winding 11 is connected to an air cored coil 13 moving in the field of three stator windings 14, 15, 16, to which are fed currents from the windings 4, 5, 6 of the generator. The coil 13 takes up a position dependent on the difference in phase between the currents generated in the coil 1, Fig. 1, and in the coils 4, 5, 6, and therefore indicates the compass direction of the vehicle. The iron parts of the transformers 8, 9, 11, 12 may be provided with air-gaps, for example an axial slot, or may be segmented. The rotor coil 13 may be damped by means of a small gyroscope or by immersing the instrument in a damping liquid.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB339240A GB539817A (en) | 1940-02-23 | 1940-02-23 | Improvements in or relating to direction indicating instruments |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB339240A GB539817A (en) | 1940-02-23 | 1940-02-23 | Improvements in or relating to direction indicating instruments |
Publications (1)
Publication Number | Publication Date |
---|---|
GB539817A true GB539817A (en) | 1941-09-25 |
Family
ID=9757472
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB339240A Expired GB539817A (en) | 1940-02-23 | 1940-02-23 | Improvements in or relating to direction indicating instruments |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB539817A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2593973A (en) * | 1947-06-20 | 1952-04-22 | C Electronics Developments Ltd | Remote control device |
US2611191A (en) * | 1945-05-29 | 1952-09-23 | Bendix Aviat Corp | Telemetric or repeater system |
US2641060A (en) * | 1951-09-04 | 1953-06-09 | Kenneth W Sweeton | Earth inductor compass assembly |
US3793737A (en) * | 1970-10-09 | 1974-02-26 | M Alth | Self-timed reaction-mass compass |
US4442609A (en) * | 1980-09-25 | 1984-04-17 | Nissan Motor Company, Limited | Vehicle orientation detecting device for an automotive vehicle or another vehicle |
CN113985279A (en) * | 2021-11-01 | 2022-01-28 | 华北电力大学(保定) | Asymmetric fault diagnosis method and system for stator winding of permanent magnet wind driven generator |
-
1940
- 1940-02-23 GB GB339240A patent/GB539817A/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2611191A (en) * | 1945-05-29 | 1952-09-23 | Bendix Aviat Corp | Telemetric or repeater system |
US2593973A (en) * | 1947-06-20 | 1952-04-22 | C Electronics Developments Ltd | Remote control device |
US2641060A (en) * | 1951-09-04 | 1953-06-09 | Kenneth W Sweeton | Earth inductor compass assembly |
US3793737A (en) * | 1970-10-09 | 1974-02-26 | M Alth | Self-timed reaction-mass compass |
US4442609A (en) * | 1980-09-25 | 1984-04-17 | Nissan Motor Company, Limited | Vehicle orientation detecting device for an automotive vehicle or another vehicle |
CN113985279A (en) * | 2021-11-01 | 2022-01-28 | 华北电力大学(保定) | Asymmetric fault diagnosis method and system for stator winding of permanent magnet wind driven generator |
CN113985279B (en) * | 2021-11-01 | 2023-06-20 | 华北电力大学(保定) | Asymmetric fault diagnosis method and system for stator winding of permanent magnet wind driven generator |
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