VOICE-DIRECTED AIRCRAFT NAVIGATION SYSTEM
First Claim
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1. In combination with an Instrument Landing System having a glide slope angle of about 3* for take-off and landing to the runway, an aircraft runway distance monitor system for providing an audible and vocal indication 0f the longitudinal position of the aircraft along the runway, said monitor system comprising:
- a plurality of low-power voice modulated portable transmitters with half wave antenna each positioned at marker locations fitted with lights on each side of said runway, said marker locations being spaced at regular intervals along said runway and opposite each other serving as runway marker lights with a power source and switching means for energizing and actuating said lights;
said low-power voice modulated transmitter including endless magnetic tape reproducer means for playing selected words for transmission at each of said transmitters which indicate by the word and repeating of said words, the longitudinal position of the aircraft when received by a receiver in the aircraft;
said low-power transmitter broadcasting a distance of about 200 feet in the radiospectrum and being a voice modulated crystal controlled unit having less than 100 milliwatts power to the r - f stage whereby the weak audio signals of all of the transmitters in the same row permit a clear repetition of the voice signal for a short distance of about 200 feed and less than 300 feet within a succession of said signals along the runway, this distance defining a proximate range for each transmitter;
receiver means in the aircraft including an audio indicator means for successively receiving the radiated voice signals from said transmitter within the proximate range for each transmitter, the voice signal received first increasing in volume as the aircraft approaches the selected transmitter and then decreasing in volume as the aircraft passes beyond the proximate range of said transmitter; and
, a selector switch means for the rows of said runway transmitters having two positions, one for take-off and one for landing, the setting of said switch energizing words for transmission from said endless tape reproducers selected either for aircraft take-off or selected for aircraft landing.
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Abstract
A navigation-by-communication system for informing the pilot of an aircraft as to the location of the aircraft along the approach-landing path, and along the runway during the critical period of landing and during take-off, especially during conditions of light and/or weather which prevent outside visual reference to terrestrial or celestial fixes.
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Citations
1 Claim
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1. In combination with an Instrument Landing System having a glide slope angle of about 3* for take-off and landing to the runway, an aircraft runway distance monitor system for providing an audible and vocal indication 0f the longitudinal position of the aircraft along the runway, said monitor system comprising:
- a plurality of low-power voice modulated portable transmitters with half wave antenna each positioned at marker locations fitted with lights on each side of said runway, said marker locations being spaced at regular intervals along said runway and opposite each other serving as runway marker lights with a power source and switching means for energizing and actuating said lights;
said low-power voice modulated transmitter including endless magnetic tape reproducer means for playing selected words for transmission at each of said transmitters which indicate by the word and repeating of said words, the longitudinal position of the aircraft when received by a receiver in the aircraft;
said low-power transmitter broadcasting a distance of about 200 feet in the radiospectrum and being a voice modulated crystal controlled unit having less than 100 milliwatts power to the r - f stage whereby the weak audio signals of all of the transmitters in the same row permit a clear repetition of the voice signal for a short distance of about 200 feed and less than 300 feet within a succession of said signals along the runway, this distance defining a proximate range for each transmitter;
receiver means in the aircraft including an audio indicator means for successively receiving the radiated voice signals from said transmitter within the proximate range for each transmitter, the voice signal received first increasing in volume as the aircraft approaches the selected transmitter and then decreasing in volume as the aircraft passes beyond the proximate range of said transmitter; and
, a selector switch means for the rows of said runway transmitters having two positions, one for take-off and one for landing, the setting of said switch energizing words for transmission from said endless tape reproducers selected either for aircraft take-off or selected for aircraft landing.
- a plurality of low-power voice modulated portable transmitters with half wave antenna each positioned at marker locations fitted with lights on each side of said runway, said marker locations being spaced at regular intervals along said runway and opposite each other serving as runway marker lights with a power source and switching means for energizing and actuating said lights;
Specification
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Current AssigneeCarl J. Crane
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Original AssigneeCarl J. Crane
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InventorsCrane, Carl J.
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Primary Examiner(s)Wilbur, Maynard R.
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Assistant Examiner(s)Berger, Richard E.
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Application NumberUS05/262,528Time in Patent Office846 DaysField of Search343/101,102,108,112D 340/25US Class Current342/386CPC Class CodesG01S 1/02 using radio waves G01S19/00...G01S 1/06 Means for providing multipl...
