GB1024640A - Improvements in radio direction finding instruments - Google Patents

Improvements in radio direction finding instruments

Info

Publication number
GB1024640A
GB1024640A GB4602863A GB4602863A GB1024640A GB 1024640 A GB1024640 A GB 1024640A GB 4602863 A GB4602863 A GB 4602863A GB 4602863 A GB4602863 A GB 4602863A GB 1024640 A GB1024640 A GB 1024640A
Authority
GB
United Kingdom
Prior art keywords
compass
casing
receiver
energizes
nov
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
GB4602863A
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.)
DONALD CHARLES ALFRED CROWHURS
Original Assignee
DONALD CHARLES ALFRED CROWHURS
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 DONALD CHARLES ALFRED CROWHURS filed Critical DONALD CHARLES ALFRED CROWHURS
Priority to GB4602863A priority Critical patent/GB1024640A/en
Publication of GB1024640A publication Critical patent/GB1024640A/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)
  • Structure Of Receivers (AREA)

Abstract

1,024,640. Radio direction finders. D. C. A. CROWHURST. Nov. 12, 1964 [Nov. 21, 1963], No. 46028/63. Heading H4D. A hand-held self-contained null position direction finding apparatus comprises, within a casing 10, Fig. 1, a ferrite rod directional aerial 18 feeding a transistorized printed circuit radio receiver 20, and a compass 34 whereby the bearing of the received radio signal may be indicated. The aerial 18 is housed in an upper elongated portion 14 of the casing and the receiver and compass are contained in a cylindrical portion 12 of the casing. The receiver, which is powered by batteries 39, has a tuning condenser 22 with movable vanes moved by gear-wheel 24 and a disc 28, the disc protruding through the casing so as to be externally adjustable. The frequency to which the receiver is tuned is indicated on a scale 26 fixed to gear-wheel 24 and viewable through a window 32 having a vertical-cursor inscribed thereon. The compass has a compass and 35 fixed to the magnets 34 and provided with a transparent graduated turned-down edge 36 which is also viewed through window 26. A push button switch 50 energizes a lamp 54 behind the compass and frequency scales so that they may be viewed in the dark. The audio output of the receiver is listened to by means of ear plug 46, two such plugs being provided for noisy external conditions. A switch 52 energizes a beat frequency oscillator so that audible signals can be heated from received C.W. beacon signals. A volume control is also provided. A pair of sights is provided on top of the elongated portion 14 of the casing.
GB4602863A 1963-11-21 1963-11-21 Improvements in radio direction finding instruments Expired GB1024640A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4602863A GB1024640A (en) 1963-11-21 1963-11-21 Improvements in radio direction finding instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4602863A GB1024640A (en) 1963-11-21 1963-11-21 Improvements in radio direction finding instruments

Publications (1)

Publication Number Publication Date
GB1024640A true GB1024640A (en) 1966-03-30

Family

ID=10439547

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4602863A Expired GB1024640A (en) 1963-11-21 1963-11-21 Improvements in radio direction finding instruments

Country Status (1)

Country Link
GB (1) GB1024640A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3683384A (en) * 1969-07-22 1972-08-08 Vec Trak Research & Dev Corp Radio direction finder
FR2451588A1 (en) * 1979-03-14 1980-10-10 Clausin Jacques Laying of nautical navigation bearing - uses radio-goniometer with coloured LED indicating presence of beacon signal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3683384A (en) * 1969-07-22 1972-08-08 Vec Trak Research & Dev Corp Radio direction finder
FR2451588A1 (en) * 1979-03-14 1980-10-10 Clausin Jacques Laying of nautical navigation bearing - uses radio-goniometer with coloured LED indicating presence of beacon signal

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