US3925751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glide slope warning system with a variable warning rate
Assignee: Sundstrand Data Control Inc
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Filing: 1975-04-02
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Granted: 1975-12-09
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Expires: 1995-04-02
Abstract
Abstract In a system where the aircraft''s distance below a radio glide slope is compared with the aircraft''s altitude above ground to generate either an advisory voice warning or a command voice warning depending upon the aircraft''s altitude and distance below the radial glide slope beam, the repetition rate of the advisory voice warning is varied as both a function of distance below the radio glide slope beam and of altitude in order to generate advisory warnings at a rate reflecting increasing danger to the aircraft. This is accomplished by integrating the glide slope deviation signal over time and comparing it with a radio altitude signal so as to generate a signal for triggering the advisory warning as a function of the glide slope deviation and the radio altitude thereby generating the advisory warnings as a function of decreasing radio altitude and increasing deviation from the glide slope.
Inventors
- 👤 Charles Donald Bateman
- 👤 Hans Rudolf Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:45
CPC Classifications
G; G01; G01C; G01C5/00; G01C5/005; G01S; G01S1/00; G01S1/02; G01S13/00; G01S13/88; G01S13/91; G01S13/913; G08; G08G; G08G5/00; G08G5/20; G08G5/21; G08G5/50; G08G5/54; G08G5/70; G08G5/74; G08G5/80
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
55 words
A glide slope warning system for aircraft responsive to a glide slope radio beam and an altitude signal, with a variable warning capacility, comprising: means for generating a below glide slope voice warning; and means for varying the repetition rate of said voice warning as a function of the aircraft''s deviation from the glide slope.
Claim 2
Dependent Claim
55 words
A glide slope warning system for aircraft responsive to a glide slope radio beam and an altitude signal, with a variable warning capacility, comprising: means for generating a below glide slope voice warning; and means for varying the repetition rate of said voice warning as a function of the aircraft''s deviation from the glide slope.
Claim 3
Dependent Claim
24 words
The system of claim 1 additionally including means for varying the repetition rate of said voice warning as a function of the aircraft''s altitude.
Claim 4
Dependent Claim
58 words
A glide slope warning system for aircraft responsive to a glide slope radio beam and an altitude signal comprising: means responsive to the glide slope radio beam and the altitude signal means for generating a below glide slope voice warning; and means for varying the repetition rate of said voice warning as a function of the aircraft''s altitude.
Claim 5
Dependent Claim
58 words
A glide slope warning system for aircraft responsive to a glide slope radio beam and an altitude signal comprising: means responsive to the glide slope radio beam and the altitude signal means for generating a below glide slope voice warning; and means for varying the repetition rate of said voice warning as a function of the aircraft''s altitude.
Claim 6
Dependent Claim
27 words
The system of claim 3 additionally including means, cooperating with said varying means, for varying the repetition rate of said voice warning as a function of (hR/GS).
Claim 7
Dependent Claim
116 words
A glide slope warning system, for use by aircraft at airports equipped with a glide slope radio beam, having: means for generating a signal representing the deviation of the aircraft from the glide slope; and means for generating a signal representing the aircraft''s altitude above ground comprising: means, responsive to the glide slope deviation signal, for generating an advisory warning; means responsive to the glide slope deviation signal and the altitude signal, for generating a command warning; means for varying the repetition rate of said advisory signal as a function of the glide slope deviation signal and the altitude signal; and means responsive to said command signal means and said varying means for generating voice warnings.
Claim 8
Dependent Claim
116 words
A glide slope warning system, for use by aircraft at airports equipped with a glide slope radio beam, having: means for generating a signal representing the deviation of the aircraft from the glide slope; and means for generating a signal representing the aircraft''s altitude above ground comprising: means, responsive to the glide slope deviation signal, for generating an advisory warning; means responsive to the glide slope deviation signal and the altitude signal, for generating a command warning; means for varying the repetition rate of said advisory signal as a function of the glide slope deviation signal and the altitude signal; and means responsive to said command signal means and said varying means for generating voice warnings.
Claim 9
Dependent Claim
19 words
The system of claim 5 additionally including means, responsive to said command voice warning for generating an audible warning.
Claim 10
Dependent Claim
53 words
The system of claim 5 wherein said varying means comprises: integrating means, responsive to the glide slope deviation signal, for generating a ramp signal proportional to the glide slope deviation signal; comparator means, responsive to the altitude signal and to said ramp signal, for generating a trigger signal for said advisory voice warning.
Claim 11
Dependent Claim
28 words
The system of claim 7 wherein said varying means additionally includes enabling means for generating a first pulse of said triggering signal and enabling said voice generating means.
Claim 12
Dependent Claim
27 words
The system of claim 8 wherein said voice generating means additionally generates a suppression signal for deactivating said integrating means while an audible warning is being generated.
Claim 13
Dependent Claim
49 words
The system of claim 9 wherein said voice generating means includes: a digital memory; control means responsive to said command warning signal and said varying means, for accessing a sequence of digital words from said memory; digital to analog means for converting said digital words to a voice signal.
Claim 14
Dependent Claim
181 words
A glide slope warning system, for use by aircraft at airports equipped with a glide slope radio beam, having: means for generating a signal representing the deviation of the aircraft from the glide slope; and means for generating a signal representing the aircraft''s altitude above ground, comprising: signal means, responsive to the glide slope deviation signal and the altitude signal, for generating a command warning signal and an advisory warning signal; an integrating circuit responsive to the glide slope deviation signal for producing a ramp voltage proportional to the glide slope deviation signal; a comparator circuit operatively connected to said integrating circuit and responsive to the altitude signal; a pulse circuit responsive to said advisory warning signal and operatively connected to said comparator circuit for generating a plurality of triggering pulses proportional in repetition rate to the aircraft''s altitude and deviation from the glide slOpe; a voice generator operatively connected to said pulse circuit and said signal means for selectively generating a plurality of command voice warnings or a plurality of advisory voice warnings corresponding to each of said triggering pulses.
Claim 15
Dependent Claim
181 words
A glide slope warning system, for use by aircraft at airports equipped with a glide slope radio beam, having: means for generating a signal representing the deviation of the aircraft from the glide slope; and means for generating a signal representing the aircraft''s altitude above ground, comprising: signal means, responsive to the glide slope deviation signal and the altitude signal, for generating a command warning signal and an advisory warning signal; an integrating circuit responsive to the glide slope deviation signal for producing a ramp voltage proportional to the glide slope deviation signal; a comparator circuit operatively connected to said integrating circuit and responsive to the altitude signal; a pulse circuit responsive to said advisory warning signal and operatively connected to said comparator circuit for generating a plurality of triggering pulses proportional in repetition rate to the aircraft''s altitude and deviation from the glide slOpe; a voice generator operatively connected to said pulse circuit and said signal means for selectively generating a plurality of command voice warnings or a plurality of advisory voice warnings corresponding to each of said triggering pulses.
Claim 16
Dependent Claim
71 words
The warning system of claim 11 wherein said voice generator includes: a read only digital memory containing sequence of words corresponding to a command warning and an advisory warning; control means responsive to the command warning signal and said triggering pulses for selectively accessing said sequence of digital words corresponding to said command warning; and digital to analog converter for converting said sequence of digital words to an audible voice warning.
Claim 17
Dependent Claim
30 words
The warning system of claim 12 wherein said voice generator is operatively connected to said comparator circuit and generates a pulse suppression signal while said voice warnings are in progress.
References Cited (Backward Citations)
US3581014A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |