GB426328A - Improvements in wireless direction and position finding - Google Patents

Improvements in wireless direction and position finding

Info

Publication number
GB426328A
GB426328A GB2169533A GB2169533A GB426328A GB 426328 A GB426328 A GB 426328A GB 2169533 A GB2169533 A GB 2169533A GB 2169533 A GB2169533 A GB 2169533A GB 426328 A GB426328 A GB 426328A
Authority
GB
United Kingdom
Prior art keywords
switches
screen
received
aeroplane
aerials
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
GB2169533A
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.)
JAMES FLEMING HERD
LABOUCHERE HILLYER BAINBRIDGE
Original Assignee
JAMES FLEMING HERD
LABOUCHERE HILLYER BAINBRIDGE
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 JAMES FLEMING HERD, LABOUCHERE HILLYER BAINBRIDGE filed Critical JAMES FLEMING HERD
Priority to GB2169533A priority Critical patent/GB426328A/en
Publication of GB426328A publication Critical patent/GB426328A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S1/00Beacons 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
    • G01S1/02Beacons 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

Abstract

426,328. Directive wireless signalling. WATT, R. A. W., HERD, J. F., and BELL, L. H. BAINBRIDGE-, National Physical Laboratory, Teddington, Middlesex. Aug. 2, 1933, No. 21695. [Class 40 (v)] The position of a moving craft is shown on the screen 6 of a cathode-ray tube as the intersection 14 of two lines formed by the track of the electron stream under the control of the radiation received from two land transmitters 8, 9 spaced apart. The screen of the tube is associated with a map of the locality. The deflection of the electron stream is due to the directional effect of two frame aerials, tuned to the transmitting stations. The spot on the screen formed by the impact of the electron stream when no signals are being received is rapidly and alternately zeroized at the points 8 and 9 (corresponding to the two radio transmitters) by the application of suitable control voltages. The received signals then produce the visible intersecting tracks 8, 12 and 9, 13 owing to the persistence of vision. As shown in Fig. 3, the two frame aerials 15, 151 are tuned first to one and then to the other transmitter by switches 18, 18<1>, which simultaneously change the zeroizing voltages for the spot by means of switches 27, 26 which apply different control to the electrodes 25, 24 of the cathode ray tube from a potentiometer 28. The switches are operated from a rotating disc 31 and connecting-rod 30. The two frame aerials are connected across the deflecting electrodes 21, 22, as shown. The zeroizing voltages are automatically changed, when the map of a new locality is inserted over the fluorescent screen. This is effected by means of projections such as 34, 38, Fig. 4, on the underside of the maps 33, 37, which close contacts associated with the potentiometer switches 27, 26. The method can be used at a ground station to locate the position of an aeroplane in flight. The elevation of aeroplane can also be determined from the ground by observation of the " error of bearing or " aeroplane effect," or as shown in Fig. 6 by measuring the elliptical trace produced on a cathode-ray indicator 41 by the phase-difference in the signals received on the two spaced aerials 39, 39'. Or it can be obtained on the craft by ascertaining the incident angle at which horizontally-polarized radiation from a ground transmitter reaches the machine. Specification 252,263, [Class 40 (v)], is referred to.
GB2169533A 1933-08-02 1933-08-02 Improvements in wireless direction and position finding Expired GB426328A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2169533A GB426328A (en) 1933-08-02 1933-08-02 Improvements in wireless direction and position finding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2169533A GB426328A (en) 1933-08-02 1933-08-02 Improvements in wireless direction and position finding

Publications (1)

Publication Number Publication Date
GB426328A true GB426328A (en) 1935-04-02

Family

ID=10167279

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2169533A Expired GB426328A (en) 1933-08-02 1933-08-02 Improvements in wireless direction and position finding

Country Status (1)

Country Link
GB (1) GB426328A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2415094A (en) * 1938-01-17 1947-02-04 Board Radio measurement of distances and velocities

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2415094A (en) * 1938-01-17 1947-02-04 Board Radio measurement of distances and velocities

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