GB327769A - Radio direction finder - Google Patents
Radio direction finderInfo
- Publication number
- GB327769A GB327769A GB172929A GB172929A GB327769A GB 327769 A GB327769 A GB 327769A GB 172929 A GB172929 A GB 172929A GB 172929 A GB172929 A GB 172929A GB 327769 A GB327769 A GB 327769A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- magnet
- rotated
- galvanometer
- transmitter
- 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
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
327,769. Standard Telephones & Cables, Ltd., (Busignies, H. G.). Jan. 17. 1929. Directive signalling.-In a direction finder, a visual indication of the direction of the transmitter is obtained from a galvanometer, the magnet of which is rotated with the goniometer coil. The goniometer coil C, Fig. 1, is successively coupled to each pair of aerial inductances B1, B2 as C is rotated, a vertical aerial A being utilized to eliminate the 180‹ ambiguity. The combined output from A and C is passed to the galvanometer coil D through a series of valves acting as highfrequency amplifiers; a local heterodyne is used for C, W. The galvanometer magnet V and search coil C are mounted on a common shaft Q, Fig. 3, which is rotated by an electric motor coupled to the sleeve M. The coil D is made in two parts, the pivots of the coil being at p p. Laminations F are mounted inside the coil and in the air gap between the poles of the magnet V. For each complete revolution of the shaft Q the received signal intensity will pass through a maximum when the plane of C coincides with the direction of the transmitter, the magnet V being arranged so that its field also coincides with this direction. The rectified current supplied to the coil D will be a maximum at the same moment: if the magnet is rotated at a sufficient speed, and the coil D has sufficient inertia. which is increased by damping, the effects combine, D taking up a position in which its field coincides with that of the magnet at the moment of maximum signal intensity. Coil D carries a circular scale e, Fig. 3, calibrated with a fixed index I, a direct visual indication of the direction of the transmitter being thus obtained. If the vertical antenna A is omitted, the magnet V must be rotated at twice the speed of coil C for the apparatus to function correctly.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR34480D FR34480E (en) | 1929-01-17 | ||
NL27320D NL27320C (en) | 1929-01-17 | ||
GB172929A GB327769A (en) | 1929-01-17 | 1929-01-17 | Radio direction finder |
DEI36834D DE525750C (en) | 1929-01-17 | 1929-01-25 | Radio direction finder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB172929A GB327769A (en) | 1929-01-17 | 1929-01-17 | Radio direction finder |
Publications (1)
Publication Number | Publication Date |
---|---|
GB327769A true GB327769A (en) | 1930-04-17 |
Family
ID=9726971
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB172929A Expired GB327769A (en) | 1929-01-17 | 1929-01-17 | Radio direction finder |
Country Status (3)
Country | Link |
---|---|
FR (1) | FR34480E (en) |
GB (1) | GB327769A (en) |
NL (1) | NL27320C (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU761267C (en) | 1998-09-09 | 2007-08-09 | Metabasis Therapeutics, Inc. | Novel heteroaromatic inhibitors of fructose 1,6-bisphosphatase |
-
0
- NL NL27320D patent/NL27320C/xx active
- FR FR34480D patent/FR34480E/fr not_active Expired
-
1929
- 1929-01-17 GB GB172929A patent/GB327769A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL27320C (en) | |
FR34480E (en) | 1929-06-19 |
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