GB648713A - Improvements in or relating to radio direction finders - Google Patents

Improvements in or relating to radio direction finders

Info

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
Application number
GB6817/48A
Inventor
Joseph Douglas Brailsford
Eric Burnett Vass
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Priority to GB6817/48A priority Critical patent/GB648713A/en
Priority to FR979439D priority patent/FR979439A/en
Priority to DEP32628A priority patent/DE862030C/en
Priority to US77922A priority patent/US2605465A/en
Publication of GB648713A publication Critical patent/GB648713A/en
Expired legal-status Critical Current

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)
  • Near-Field Transmission Systems (AREA)
  • Mobile Radio Communication 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.
GB6817/48A 1948-03-04 1948-03-04 Improvements in or relating to radio direction finders Expired GB648713A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
FR979439A (en) 1951-04-26
US2605465A (en) 1952-07-29
DE862030C (en) 1953-01-08

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