GB500592A - Improvements in or relating to radio receiving and direction finding apparatus - Google Patents

Improvements in or relating to radio receiving and direction finding apparatus

Info

Publication number
GB500592A
GB500592A GB22812/37A GB2281237A GB500592A GB 500592 A GB500592 A GB 500592A GB 22812/37 A GB22812/37 A GB 22812/37A GB 2281237 A GB2281237 A GB 2281237A GB 500592 A GB500592 A GB 500592A
Authority
GB
United Kingdom
Prior art keywords
directional
characteristic
frequency
signal
omni
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
GB22812/37A
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.)
JOHN PARKYN JEFFCOCK
Original Assignee
JOHN PARKYN JEFFCOCK
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 JOHN PARKYN JEFFCOCK filed Critical JOHN PARKYN JEFFCOCK
Priority to GB22812/37A priority Critical patent/GB500592A/en
Priority to US225994A priority patent/US2186867A/en
Publication of GB500592A publication Critical patent/GB500592A/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)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

500,592. Directive wireless systems. JEFFCOCK, J. P. Aug. 20, 1937, No. 22812. [Class 40 (v)] A highly selective cathode-ray tube direction finder is provided with an omni-directional aural monitoring device having a band-pass characteristic with a sharp projecting peak coinciding with the peak of the directional circuit characteristic whereby signals transmitted on frequencies adjacent to the indicating signal frequency can also be heard, thus facilitating the tuning. In Fig. 1, two components 1, 2 of a directive aerial system, e.g. Adcock or Bellini-Tosi, are fed to the two pairs of deflecting plates of a cathode-ray tube 3 through two sets of frequency changers and through the highly selective amplifiers A and B. The bearing " sense " is obtained by feeding the signal from the omni-directional aerial 4 through 'similar frequency changers and the selective amplifier C to the modulating or focusing cylinder 8. After the first stage of frequency conversion, the non-directional signal is also fed through the parallel connected monitor amplifier D having a flat-topped band-pass characteristic. The outputs from the " sense " and monitor amplifiers are combined after detection to produce the characteristic of Fig. 4. For C.W. reception a variable heterodyne note is produced by means of oscillator 6.
GB22812/37A 1937-08-20 1937-08-20 Improvements in or relating to radio receiving and direction finding apparatus Expired GB500592A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB22812/37A GB500592A (en) 1937-08-20 1937-08-20 Improvements in or relating to radio receiving and direction finding apparatus
US225994A US2186867A (en) 1937-08-20 1938-08-20 Radio receiving and direction finding apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB22812/37A GB500592A (en) 1937-08-20 1937-08-20 Improvements in or relating to radio receiving and direction finding apparatus

Publications (1)

Publication Number Publication Date
GB500592A true GB500592A (en) 1939-02-13

Family

ID=10185449

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22812/37A Expired GB500592A (en) 1937-08-20 1937-08-20 Improvements in or relating to radio receiving and direction finding apparatus

Country Status (2)

Country Link
US (1) US2186867A (en)
GB (1) GB500592A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2524851A (en) * 1943-06-24 1950-10-10 Edwin K Stodola Radio receiver with pulse sharpening system
US2883663A (en) * 1955-03-11 1959-04-21 William J Kessler Means for direction finding and ranging on atmospherics
US4087817A (en) * 1977-01-17 1978-05-02 The Bendix Corporation ADF antenna

Also Published As

Publication number Publication date
US2186867A (en) 1940-01-09

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