US3521281A - Supervisory apparatus - Google Patents

Supervisory apparatus Download PDF

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Publication number
US3521281A
US3521281A US775360A US3521281DA US3521281A US 3521281 A US3521281 A US 3521281A US 775360 A US775360 A US 775360A US 3521281D A US3521281D A US 3521281DA US 3521281 A US3521281 A US 3521281A
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US
United States
Prior art keywords
conductor
conductors
switch
pulses
tilt
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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
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US775360A
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English (en)
Inventor
Harold S Jewitt
Delbert E Marker
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Honeywell Inc
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Honeywell Inc
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Filing date
Publication date
Application filed by Honeywell Inc filed Critical Honeywell Inc
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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

  • This invention relates to the field of supervisory apparatus, and more particularly to apparatus for use in controlling the movements of one or more aircraft to follow a predetermined path in space. It is customary to do this by means of directional antennas properly located and oriented with respect to one another to make up a directional array.
  • a convenient arrangement is one in which a first pair of antennas provide signals which cooperate to define the path in elevation, and a second pair of antennas provide signals which cooperate to define the path in azimuth.
  • the signals may be jointly referred to as guidance signals.
  • the path thereafter by defined by the antennas is no longer that desired, and may indeed be dangerous because it is now too steep or too close to a hazard such as a tall structure adjacent the landing area.
  • the present invention adds to the known ground equipment means for detecting tilt of the antenna assembly and means actuated thereby for preventing any radiation from the directional antennas, while at the same time adding to the omnidirectionally radiated signal, a signal indicating tilt of the antenna.
  • the added signal actuates a Warning lamp, indicating that any directional indications are not to be relied on.
  • FIG. 1 the ground based portion of a system embodying our invention is shown in block diagram to comprise as major elements a signal generator 10, a receiver 11 including an omnidirection receiving antenna 12, a station code and range reply generator 13, a modulator 14, a tilt alarm 15, a lobe selector 16, a transmitter 17, a two-position RF switch 20, a four-position RF switch 21, an omnidirectional transmitting antenna 22, and Up, Down, Left, and Right directional antennas 23, 24, 25 and 26.
  • Conductors 30 and 31 are connected to fixed contacts 84 and 85 and movable contacts 82 and 83 are connected to conductors 32 and 33.
  • Positive source 60 is connected to movable contact 65 through switch 89 and conductor 91, to fixed contact 75 through switch 89 and conductor 92, and to fixed contact 87 through switch 89 and conductor 93.
  • Negative source 62 is connected to fixed contact 86 through conductor 94.
  • Fixed contact 76 is connected to delay generator 90 by conductor 95.
  • Fixed contact 64 is connected to one end of winding 67 through a path made up of conductors 96, 97 and 100; the other end of winding 67 is grounded.
  • Generator 13 supplies a pulse through conductor 40, tilt alarm 15 and conductor 41 to lobe selector 16, which supplies a further delayed guidance pulse to modulator 14 through conductor 43 and also supplies a signal on one of connections 44, 45, 46 and 47 to actuate switch 21 so that a selected one of antennas 23, 24, and 26 is connected to conductor 52.
  • Modulator 14 acts through conductor 50 to modulate transmitter 17 with the station code and guidance pulses, and the transmitter supplies a train of four bursts of RF energy through conductor 51, switch 20, conductor 52, and switch 21 to the selected antenna.
  • the tilt alarm circuitry is shown in more detail in FIG. 4 to comprise a delay circuit 171, a gate generator 172, an inverter 173, a second AND circuit 174, a driver 175, an amplifier 176, a source 177 of voltage positive with respect to ground 180, a relay 181 having a winding 182 which energizes an armature 183 to actuate a movable contact 184 out of normal engagement with a first fixed contact 185 and into engagement with a second fixed contact 186, and a transient suppressing diode 187.
  • the gating arrangement also accepts the output of decoder 128 on conductor 160 and supplies it to the proper cross-pointer meter in indicator 131 through conductors 161 and 162 or conductors 163 and 164. As long as signals are being supplied on these four conductors the warning flags on the cross-pointer meters are withdrawn.
  • antenna 121 of FIG. 3 receives no angle pulses. No inputs are supplied on conductors 161-164, the cross-pointers return to their central zero positions, and the warning flags appear. Since this may take some time, an immediate signal is supplied to warn the pilot.
  • the tilt alarm pulses which have replaced the angle pulses are so timed, with respect to delay 171, FIG. 4, that simultaneous signals now reach AND circuit 174 on conductors 151 and 193, and relay 184 is energized to light warning lamp 133.
  • means providing a first radio signal means directionally radiating said first signal; means responsive to the displacement of the radiating means from a predetermined orientation; and

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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)
  • Radar Systems Or Details Thereof (AREA)
US775360A 1968-11-13 1968-11-13 Supervisory apparatus Expired - Lifetime US3521281A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US77536068A 1968-11-13 1968-11-13

Publications (1)

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US3521281A true US3521281A (en) 1970-07-21

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ID=25104156

Family Applications (1)

Application Number Title Priority Date Filing Date
US775360A Expired - Lifetime US3521281A (en) 1968-11-13 1968-11-13 Supervisory apparatus

Country Status (6)

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US (1) US3521281A (enrdf_load_stackoverflow)
CH (1) CH499840A (enrdf_load_stackoverflow)
DE (1) DE1956311A1 (enrdf_load_stackoverflow)
FR (1) FR2023173A1 (enrdf_load_stackoverflow)
GB (1) GB1258996A (enrdf_load_stackoverflow)
NL (1) NL6916849A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4656477A (en) * 1981-10-06 1987-04-07 Selenia Industrie Elettroniche Associate--S.p.A. Perfectioning in reply type radar systems, in particular the SSR type

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19756364A1 (de) * 1997-12-18 1999-06-24 Cit Alcatel Überwachung der Phasenlage von Course- und Clearance-Signalen bei einem Instrumentenlandesystem
DE202009006912U1 (de) 2009-05-13 2010-04-22 Hera Gmbh & Co. Kg Reflektor an Leuchtstoffröhre

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2412703A (en) * 1941-08-29 1946-12-17 Rca Corp Radio locator device
US3095538A (en) * 1960-10-28 1963-06-25 Silberstein Richard Satellite relay station using antenna diversity selection
US3230348A (en) * 1951-09-01 1966-01-18 Sperry Rand Corp Missile guidance system
US3336591A (en) * 1964-12-21 1967-08-15 Sierra Research Corp One-way range and azimuth system for stationkeeping

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2412703A (en) * 1941-08-29 1946-12-17 Rca Corp Radio locator device
US3230348A (en) * 1951-09-01 1966-01-18 Sperry Rand Corp Missile guidance system
US3095538A (en) * 1960-10-28 1963-06-25 Silberstein Richard Satellite relay station using antenna diversity selection
US3336591A (en) * 1964-12-21 1967-08-15 Sierra Research Corp One-way range and azimuth system for stationkeeping

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4656477A (en) * 1981-10-06 1987-04-07 Selenia Industrie Elettroniche Associate--S.p.A. Perfectioning in reply type radar systems, in particular the SSR type

Also Published As

Publication number Publication date
FR2023173A1 (enrdf_load_stackoverflow) 1970-08-07
DE1956311A1 (de) 1970-05-27
GB1258996A (enrdf_load_stackoverflow) 1972-01-05
CH499840A (de) 1970-11-30
NL6916849A (enrdf_load_stackoverflow) 1970-05-15

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