GB645366A - Improvements in or relating to frequency modulated radio altimeters - Google Patents

Improvements in or relating to frequency modulated radio altimeters

Info

Publication number
GB645366A
GB645366A GB2766747A GB2766747A GB645366A GB 645366 A GB645366 A GB 645366A GB 2766747 A GB2766747 A GB 2766747A GB 2766747 A GB2766747 A GB 2766747A GB 645366 A GB645366 A GB 645366A
Authority
GB
United Kingdom
Prior art keywords
ranges
switching
modulated radio
indicators
display
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
GB2766747A
Inventor
Bernard Anselm Sharpe
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.)
Minister of Supply In Her Majesty S Government
Original Assignee
Minister of Supply In Her Majesty S Government
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 Minister of Supply In Her Majesty S Government filed Critical Minister of Supply In Her Majesty S Government
Priority to GB2766747A priority Critical patent/GB645366A/en
Publication of GB645366A publication Critical patent/GB645366A/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)
  • Toys (AREA)

Abstract

645,366. Radiolocation. MINISTER OF SUPPLY. Oct. 15, 1947, No. 27667. Drawings to Specification. [Class 40 (vii)] In a frequency modulated radio altimeter the need for range changing by the pilot is eliminated by modulating the frequency over two or more ranges in succession cyclically and switching the beat frequency signals (representative of height) to respective indicating means for each of said ranges. This may be performed by a rotating condenser having two diametrically opposed sets of rotor vanes of different areas with a ganged commutator for switching the beat frequency signals to the respective indicators. Masks may be operated by a relay to cover the unwanted display at any given altitude. To reduce the complexity of the display and the space required on the instrument panel the indicators may be concentrically pivoted pointers readable against respective concentric scales on a common dial, the unwanted indication being obscured by a mask arranged as in the Figure (not shown).
GB2766747A 1947-10-15 1947-10-15 Improvements in or relating to frequency modulated radio altimeters Expired GB645366A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2766747A GB645366A (en) 1947-10-15 1947-10-15 Improvements in or relating to frequency modulated radio altimeters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2766747A GB645366A (en) 1947-10-15 1947-10-15 Improvements in or relating to frequency modulated radio altimeters

Publications (1)

Publication Number Publication Date
GB645366A true GB645366A (en) 1950-11-01

Family

ID=10263304

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2766747A Expired GB645366A (en) 1947-10-15 1947-10-15 Improvements in or relating to frequency modulated radio altimeters

Country Status (1)

Country Link
GB (1) GB645366A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126863A (en) * 1964-03-31 du feu

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126863A (en) * 1964-03-31 du feu

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