GB500345A - Improvements in or relating to radio direction finding systems - Google Patents

Improvements in or relating to radio direction finding systems

Info

Publication number
GB500345A
GB500345A GB30418/38A GB3041838A GB500345A GB 500345 A GB500345 A GB 500345A GB 30418/38 A GB30418/38 A GB 30418/38A GB 3041838 A GB3041838 A GB 3041838A GB 500345 A GB500345 A GB 500345A
Authority
GB
United Kingdom
Prior art keywords
light
aerial
deflecting plates
voltage
indicator
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
GB30418/38A
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Publication of GB500345A publication Critical patent/GB500345A/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

Abstract

500,345. Directive wireless signalling. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. Oct. 20, 1938, No. 30418. Convention date, Oct. 20, 1937. Addition to 482,101. [Class 40 (v)] The parent Specification describes a continuoualy-rotating frame aerial which feeds signal-voltage to one pair of deflecting plates in a cathode-ray tube, whilst the other pair of deflecting plates is fed by a voltage derived from a light-control system to correct for quadrantal error. Part of the correcting voltage is related to the instantaneous orientation of the aerial, and part to the sine curve of error, both being derived from graded translucent masks which rotate with the aerial and pass rays of light from two independent sources of light to two photo-electric cells connected in parallel to the deflecting plates of the indicator. According to the present invention only one source of light d is used, the rays being split by a prism f and passed through two sets of mirrors t, k and h, n respectively, before being recombined at n and applied to a photo-electric cell o which supplies one pair of deflecting plates in the indicator p. One beam of light is controlled by the graded mask b, according to the instantaneous setting of the frame aerial, and the other by a superposed film, or a second mask C, which applies a sine-curve correction, both masks being mounted on the aerial shaft a. Signal voltage is supplied to the indicator from the receiver (not shown).
GB30418/38A 1937-10-20 1938-10-20 Improvements in or relating to radio direction finding systems Expired GB500345A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE500345X 1937-10-20

Publications (1)

Publication Number Publication Date
GB500345A true GB500345A (en) 1939-02-07

Family

ID=6545603

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30418/38A Expired GB500345A (en) 1937-10-20 1938-10-20 Improvements in or relating to radio direction finding systems

Country Status (1)

Country Link
GB (1) GB500345A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2543021A (en) * 1945-11-08 1951-02-27 Standard Telephones Cables Ltd Direction finder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2543021A (en) * 1945-11-08 1951-02-27 Standard Telephones Cables Ltd Direction finder

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