GB327769A - Radio direction finder - Google Patents

Radio direction finder

Info

Publication number
GB327769A
GB327769A GB172929A GB172929A GB327769A GB 327769 A GB327769 A GB 327769A GB 172929 A GB172929 A GB 172929A GB 172929 A GB172929 A GB 172929A GB 327769 A GB327769 A GB 327769A
Authority
GB
United Kingdom
Prior art keywords
coil
magnet
rotated
galvanometer
transmitter
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
GB172929A
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.)
Individual
Original Assignee
Individual
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
Priority to FR34480D priority Critical patent/FR34480E/fr
Priority to NL27320D priority patent/NL27320C/xx
Application filed by Individual filed Critical Individual
Priority to GB172929A priority patent/GB327769A/en
Priority to DEI36834D priority patent/DE525750C/en
Publication of GB327769A publication Critical patent/GB327769A/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)
  • Radar Systems Or Details Thereof (AREA)

Abstract

327,769. Standard Telephones & Cables, Ltd., (Busignies, H. G.). Jan. 17. 1929. Directive signalling.-In a direction finder, a visual indication of the direction of the transmitter is obtained from a galvanometer, the magnet of which is rotated with the goniometer coil. The goniometer coil C, Fig. 1, is successively coupled to each pair of aerial inductances B1, B2 as C is rotated, a vertical aerial A being utilized to eliminate the 180‹ ambiguity. The combined output from A and C is passed to the galvanometer coil D through a series of valves acting as highfrequency amplifiers; a local heterodyne is used for C, W. The galvanometer magnet V and search coil C are mounted on a common shaft Q, Fig. 3, which is rotated by an electric motor coupled to the sleeve M. The coil D is made in two parts, the pivots of the coil being at p p. Laminations F are mounted inside the coil and in the air gap between the poles of the magnet V. For each complete revolution of the shaft Q the received signal intensity will pass through a maximum when the plane of C coincides with the direction of the transmitter, the magnet V being arranged so that its field also coincides with this direction. The rectified current supplied to the coil D will be a maximum at the same moment: if the magnet is rotated at a sufficient speed, and the coil D has sufficient inertia. which is increased by damping, the effects combine, D taking up a position in which its field coincides with that of the magnet at the moment of maximum signal intensity. Coil D carries a circular scale e, Fig. 3, calibrated with a fixed index I, a direct visual indication of the direction of the transmitter being thus obtained. If the vertical antenna A is omitted, the magnet V must be rotated at twice the speed of coil C for the apparatus to function correctly.
GB172929A 1929-01-17 1929-01-17 Radio direction finder Expired GB327769A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR34480D FR34480E (en) 1929-01-17
NL27320D NL27320C (en) 1929-01-17
GB172929A GB327769A (en) 1929-01-17 1929-01-17 Radio direction finder
DEI36834D DE525750C (en) 1929-01-17 1929-01-25 Radio direction finder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB172929A GB327769A (en) 1929-01-17 1929-01-17 Radio direction finder

Publications (1)

Publication Number Publication Date
GB327769A true GB327769A (en) 1930-04-17

Family

ID=9726971

Family Applications (1)

Application Number Title Priority Date Filing Date
GB172929A Expired GB327769A (en) 1929-01-17 1929-01-17 Radio direction finder

Country Status (3)

Country Link
FR (1) FR34480E (en)
GB (1) GB327769A (en)
NL (1) NL27320C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU761267C (en) 1998-09-09 2007-08-09 Metabasis Therapeutics, Inc. Novel heteroaromatic inhibitors of fructose 1,6-bisphosphatase

Also Published As

Publication number Publication date
NL27320C (en)
FR34480E (en) 1929-06-19

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