US2118929A - Slip-way beacon - Google Patents

Slip-way beacon Download PDF

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Publication number
US2118929A
US2118929A US9808A US980835A US2118929A US 2118929 A US2118929 A US 2118929A US 9808 A US9808 A US 9808A US 980835 A US980835 A US 980835A US 2118929 A US2118929 A US 2118929A
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US
United States
Prior art keywords
landing
slip
path
gliding path
dipole
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 - Lifetime
Application number
US9808A
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English (en)
Inventor
Kramar Ernst
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.)
Alcatel Lucent Deutschland AG
C Lorenz AG
Original Assignee
Standard Elektrik Lorenz AG
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 Standard Elektrik Lorenz AG filed Critical Standard Elektrik Lorenz AG
Application granted granted Critical
Publication of US2118929A publication Critical patent/US2118929A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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

Definitions

  • the invention is an improvement upon that disclosed in the copending patent application Ser. No. 722,470, led April 26, 1934:, ⁇ for System for landing aeroplanes.
  • a slipway beacon is described the essential features of which are that an additional signal is transmitted to the aeroplane as soon as this reaches the point where it should begin to descend, and that the landing is effected in accordance with the indication of eld intensity which the receiver shows at the moment of the reception of the additional signal.
  • This method has the advantage that the receiver need not at the commencement of the flight be adjusted to have a predetermined sensitivity, but that it is quite insignicant what a sensitivity the receiver may have.
  • the receiver should merely be of such a constancy that its sensitivity is not varied during landing, that is during the time which there is between the moment of beginning the descent and the moment of touching the ground.
  • the additional signal will preferably be transmitted by wireless on the same or approximately the same wavelength as is used for characterizing the gliding path. This path and the additional signal are differentiated from each other with the aid of different characteristic tones.
  • the invention described hereafter proposes in this connection to polarize the two radiations dierently with respect to one another. In this way, above all a considerable simplification of the entire arrangement is attained on the transmitter side.
  • a vertical polarization is employed, in order to create a good slip-way guide by means of a simple antenna arrangement comprising, for instance, a dipole continuously fed by a high-frequency generator, and two reflector dipoles keyed alternately. This is especially so if a dipole, fed continuously, and reflector dipoles are disposed in a position so high above the ground that a propagation curve suitable for the gliding path is obtained without additional devices being requisite. If according to the invention a horizontally disposed dipole is employed for the additional signal, then a discshaped radiation is attained without the aid of additional means, namely a radiation vertical to the direction in which the aircraft is moving, provided that the dipole is located in this. direction.
  • the application on the transmitter side of these different polarizations results on the receiving side (Cl. Z50-11) in the necessity for operating with receivingantennas polarized essentially in the same manner.
  • the antennas. employed on the receiving side which in most cases are dipoles, are in accordance with another feature of the invention preferably connected With separate audion stages.
  • the entire arrangement become as simple as possible, one could intend to produce gliding path and additional signal on the basis ⁇ of the same wavelength and to distinguish between them by different tones.
  • each carrier wave can be received by means of sharply tuned circuits in employing back coupling or dispensing with attenuation, a method that in the case of a wide resonance curve can of course not be adopted immediately.
  • the low frequency may then be gathered at a place after the audion, so that also here the expenditure on the receiving side will not be especially great.
  • Fig. 1 shows the gliding path in a horizontal section
  • Fig. 2 in a vertical section
  • Fig. 3 the appertaining receiving arrangement
  • Fig. 1 the landing ground is indicated b AP.
  • the gliding path is obtained by a transmission arrangement consisting of a continuously energized vertical dipole D and two alternately keyed reflectors Rl and R2. Two shifted ellipse diagrams are alternately eifective, said diagrams ranged in the landing direction.
  • a disc-shaped radiation diagram in the form of SI is effected vertically to the flying direction.
  • Fig. 2 represents a gliding path method in the vertical plane and marks the landing ground also with AP, the Vertical dipole for the gliding path radiation with D and the horizontal dipole with DI.
  • the gliding path curve GI, G2 and G3 are lines of equal field intensity of the vertically polarized gliding path radiation and the diagram ⁇ Si represents a horizontally polarized signal.
  • the airplane approaches e. g. at a height h, ascertained by means of the barometer-altimeter and intersects. the radiation of the presignal Si. The pilot knows thus that he may initiate the landing and flies e. g. on the curve of constant field intensities Gl.
  • Fig. 3 shows the receiving arrangement.
  • the vertically polarized gliding path radiation is received by means of a vertical dipole El, is ampliled in the high frequency amplier H, rectified inthe audion part Al, amplied at low frequency in the member N and conducted to the indicating instrument J or the telephone T respectively.
  • the horizontally polarized signals are received by means of the horizontal dipole E2, rectied in the second audion part A2 Vand conducted to the common low frequency amplifier N.
  • the method of aiding the landing of aircraft which comprises transmitting vertically polarized radiations for the gliding path and transmitting horizontally polarized radiations for the additional signal in a plane normal to the direction of landing of said aircraft.

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  • 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)
  • Radio Relay Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)
US9808A 1934-03-01 1935-03-07 Slip-way beacon Expired - Lifetime US2118929A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE445976X 1934-03-01

Publications (1)

Publication Number Publication Date
US2118929A true US2118929A (en) 1938-05-31

Family

ID=6537822

Family Applications (1)

Application Number Title Priority Date Filing Date
US9808A Expired - Lifetime US2118929A (en) 1934-03-01 1935-03-07 Slip-way beacon

Country Status (5)

Country Link
US (1) US2118929A (enrdf_load_stackoverflow)
BE (1) BE414416A (enrdf_load_stackoverflow)
FR (1) FR45850E (enrdf_load_stackoverflow)
GB (1) GB445976A (enrdf_load_stackoverflow)
NL (1) NL41272C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020010359A1 (en) 2018-07-06 2020-01-09 Allurion Technologies, Inc. Binary fluid control valve system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2444578A (en) * 1942-06-16 1948-07-06 Neufeld Jacob Navigational method and apparatus
US2516376A (en) * 1945-01-29 1950-07-25 Gen Railway Signal Co Airway traffic control system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020010359A1 (en) 2018-07-06 2020-01-09 Allurion Technologies, Inc. Binary fluid control valve system

Also Published As

Publication number Publication date
FR45850E (fr) 1935-12-09
BE414416A (enrdf_load_stackoverflow)
GB445976A (en) 1936-04-22
NL41272C (enrdf_load_stackoverflow)

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