GB648713A - Improvements in or relating to radio direction finders - Google Patents
Improvements in or relating to radio direction findersInfo
- Publication number
- GB648713A GB648713A GB6817/48A GB681748A GB648713A GB 648713 A GB648713 A GB 648713A GB 6817/48 A GB6817/48 A GB 6817/48A GB 681748 A GB681748 A GB 681748A GB 648713 A GB648713 A GB 648713A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contacts
- output
- receiver
- switching
- cardioid
- 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
- 230000001360 synchronised effect Effects 0.000 abstract 2
- 238000004804 winding Methods 0.000 abstract 2
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)
- Mobile Radio Communication Systems (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
648,713. Automatic control systems for radio direction finders. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. March 4, 1948, No. 6817. [Class 38 (iv)] [Also in Group XL (c)] In a switched cardioid radio direction finder synchronous input and output switching is effected by two pairs of contacts on an electromagnetic vibrator and two further pairs of contacts producing an alternating potential synchronous with the cardioid switching may be used to provide one input to an electric motor used to automatically align the aerial system with the incoming signal. The vibrator may be of the type used in car radio receivers, the armature 7 being earthed and being actuated by a coil 1 connected to the lowtension source 3 in series with contact 6. Contacts 8 serve to provide a square switching wave-form applied to device 16 to alternate the polarity in which the output of omnidirectional A is applied to receiver 17 to which the loop aerial L is also coupled. One output of receiver 17 is applied for alternate half cycles of the switching frequency to indicator 22 under control of contacts 9, this arrangement is described in Specification 647,804, [Group XL (c)]. Further contacts 23<SP>1</SP>, 24 generate a wave of the cardioid switching frequency across the secondary 30 of a transformer which is fed to one phase winding 33 of a motor 32, the other winding 34 being fed with the output of receiver 17. Motor 32 provides the drive to rotate loop aerial L until the receiver 17 gives zero output when the motor stops.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB6817/48A GB648713A (en) | 1948-03-04 | 1948-03-04 | Improvements in or relating to radio direction finders |
FR979439D FR979439A (en) | 1948-03-04 | 1949-01-25 | Improvements to direction finders |
DEP32628A DE862030C (en) | 1948-03-04 | 1949-01-28 | Switching device for a radio direction finder with field strength comparison |
US77922A US2605465A (en) | 1948-03-04 | 1949-02-23 | Radio direction finder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB6817/48A GB648713A (en) | 1948-03-04 | 1948-03-04 | Improvements in or relating to radio direction finders |
Publications (1)
Publication Number | Publication Date |
---|---|
GB648713A true GB648713A (en) | 1951-01-10 |
Family
ID=9821292
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB6817/48A Expired GB648713A (en) | 1948-03-04 | 1948-03-04 | Improvements in or relating to radio direction finders |
Country Status (4)
Country | Link |
---|---|
US (1) | US2605465A (en) |
DE (1) | DE862030C (en) |
FR (1) | FR979439A (en) |
GB (1) | GB648713A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2762002A (en) * | 1952-05-29 | 1956-09-04 | Bendix Aviat Corp | Power amplifier for servo mechanisms |
US2724115A (en) * | 1952-09-25 | 1955-11-15 | Collins Radio Co | Tracking system |
US2820963A (en) * | 1953-11-27 | 1958-01-21 | Aircraft Specialty Lines | Radio direction finding circuit |
US2968035A (en) * | 1956-01-26 | 1961-01-10 | Janis A Sirons | Radio compass |
US3534368A (en) * | 1968-09-16 | 1970-10-13 | Electro Technical Analysis Cor | Dual mode automatic direction finders |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2054160A (en) * | 1931-07-16 | 1936-09-15 | Telefunken Gmbh | Directional receiver |
US2360810A (en) * | 1938-03-19 | 1944-10-17 | Rca Corp | Self-orienting radio direction finder |
US2216708A (en) * | 1938-11-19 | 1940-10-01 | Frederick A Kolster | Directional radio system |
US2276235A (en) * | 1939-10-23 | 1942-03-10 | Weston Electrical Instr Corp | Radio compass |
US2279021A (en) * | 1939-11-30 | 1942-04-07 | Rca Corp | Directional receiver |
US2310052A (en) * | 1940-10-16 | 1943-02-02 | Westinghouse Electric & Mfg Co | Radio direction finding system |
-
1948
- 1948-03-04 GB GB6817/48A patent/GB648713A/en not_active Expired
-
1949
- 1949-01-25 FR FR979439D patent/FR979439A/en not_active Expired
- 1949-01-28 DE DEP32628A patent/DE862030C/en not_active Expired
- 1949-02-23 US US77922A patent/US2605465A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US2605465A (en) | 1952-07-29 |
DE862030C (en) | 1953-01-08 |
FR979439A (en) | 1951-04-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2812427A (en) | Passive radio communication system | |
GB519351A (en) | Systems for indicating the direction of propagation of electro-magnetic waves | |
GB663859A (en) | Improvements in or relating to selective calling systems | |
US2428966A (en) | Unifrequency radio beacon system | |
GB648713A (en) | Improvements in or relating to radio direction finders | |
GB670703A (en) | Improvements in or relating to a selective control system | |
GB793983A (en) | ||
GB651453A (en) | Improvements in signalling system and apparatus | |
US2950478A (en) | Automatic antenna positioning unit | |
GB608657A (en) | Improvements in or relating to automatic gain-control systems for amplifiers | |
US1975932A (en) | Sound-receiving and transmitting system | |
US2419987A (en) | Direction finder | |
GB619478A (en) | Improvements in or relating to high frequency transmission and receiving systems | |
SU100532A1 (en) | Device for remotely turning on and off the loudspeakers | |
US2968035A (en) | Radio compass | |
US2480118A (en) | Direction finder | |
GB614409A (en) | Radio direction finder systems | |
GB637473A (en) | Improvements in and relating to carrier telegraph systems | |
RU2025900C1 (en) | System of simplex operation with subscribers in mobile objects | |
US2158821A (en) | Program phase reverser | |
GB615417A (en) | Improvements in radio direction-finding systems | |
GB732320A (en) | Improvements in and relating to remote control systems | |
GB613605A (en) | Improvements in or relating to control arrangements for telegraph transmitters | |
GB630200A (en) | Improvements in and relating to radio signalling systems | |
GB807859A (en) | Improvements relating to remote angular position control systems |