GB610954A - Improvements in or relating to indicating systems for electrical signals, particularly for use with radio beacons - Google Patents

Improvements in or relating to indicating systems for electrical signals, particularly for use with radio beacons

Info

Publication number
GB610954A
GB610954A GB1155646A GB1155646A GB610954A GB 610954 A GB610954 A GB 610954A GB 1155646 A GB1155646 A GB 1155646A GB 1155646 A GB1155646 A GB 1155646A GB 610954 A GB610954 A GB 610954A
Authority
GB
United Kingdom
Prior art keywords
wave
resistance
rectifiers
galvanometer
load
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
GB1155646A
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.)
WILLIAM JOSEPH O BRIEN
Decca Record Co Ltd
Original Assignee
WILLIAM JOSEPH O BRIEN
Decca Record 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 WILLIAM JOSEPH O BRIEN, Decca Record Co Ltd filed Critical WILLIAM JOSEPH O BRIEN
Priority to GB1155646A priority Critical patent/GB610954A/en
Publication of GB610954A publication Critical patent/GB610954A/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)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Traffic Control Systems (AREA)

Abstract

610,954. Current-direction indicators. DECCA RECORD CO., Ltd., and O'BRIEN, W. J. April 15, 1946, No. 11556. [Class 37] [Also in Group XL (c)] An arrangement for ascertaining the polarity of the maximum peak of an alternating potential of asymmetric waveform comprises a pair of halfwave rectifiers which rectify separately the alternating potential and its image, a load resistance connected to each of the rectifiers, and a low-resistance centre zero galvanometer connected between the load sides of the rectifiers. The arrangement is described for use in the receiver of an aircraft flying towards a beacon of the overlapping- beam type, in which the two sides of the course-line are characterized by dots and dashes respectively. The received radio signals such as 49, Fig. 3 (corresponding to a preponderance of dots over dashes) are heterodyned at 12 and rectified at 29, 31 to produce the pulsating direct-current wave 50, Fig. 3, across load resistance 33. This wave is passed through filter 35, 38 to resistance 34 and the direct-current component of the voltage across this resistance is removed by condenser 40 so that the wave-form impressed on the primary of auto-transformer 39 is of the form shown at 51, Fig. 3, and the wave-form existing at the other end of the winding is the image of this (53, Fig. 4). These two voltages are impressed on the half-wave rectifiers 42, 43, provided with load resistances 44, 45, shunted by smoothing condensers 46, 47. The galvanometer 48 is connected across the loads as shown. That rectifier which is fed with the wave having the larger positive peak value conducts and produces a voltage as indicated at 54, .Fig. 4, across its associated load circuit and also blocks the other rectifier owing to the low resistance of the galvanometer. The galvanometer thus deflects to the right or the left in dependence upon the relative amplitudes of the dots and dashes.
GB1155646A 1946-04-15 1946-04-15 Improvements in or relating to indicating systems for electrical signals, particularly for use with radio beacons Expired GB610954A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1155646A GB610954A (en) 1946-04-15 1946-04-15 Improvements in or relating to indicating systems for electrical signals, particularly for use with radio beacons

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1155646A GB610954A (en) 1946-04-15 1946-04-15 Improvements in or relating to indicating systems for electrical signals, particularly for use with radio beacons

Publications (1)

Publication Number Publication Date
GB610954A true GB610954A (en) 1948-10-22

Family

ID=9988411

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1155646A Expired GB610954A (en) 1946-04-15 1946-04-15 Improvements in or relating to indicating systems for electrical signals, particularly for use with radio beacons

Country Status (1)

Country Link
GB (1) GB610954A (en)

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