Communications: electrical – Selective – Having indication or alarm
Patent
1974-02-21
1976-06-15
Caldwell, John W.
Communications: electrical
Selective
Having indication or alarm
240 12, 244114R, G08G 500
Patent
active
039640159
ABSTRACT:
A light system providing a visual indicator arrangement that is visible to an aircraft pilot to provide guidance during a runway approach segment and landing segment of the flight path of an aircraft. The system includes lighted indicators which define two inclined plane surfaces, the intersection of which forms a straight line which is precisely the correct path for the aircraft to follow in making its approach to the runway with the indicators being so arranged as to form lines which appear to the pilot to converge and intersect at an aiming point on the runway even though the point on the runway is not yet visible. Additionally, the system includes a landing segment for providing guidance for flare-out and actual touch down which includes lighted indicators at predetermined intervals alongside at least one side of the runway with the indicators defining a number of plane surfaces each of which intersect a longitudinal vertical plane passing through the runway center line so as to form or define a precise landing path for the eyes of the pilot.
REFERENCES:
patent: 2669703 (1954-02-01), Hammond et al.
patent: 2691150 (1954-10-01), Davis
patent: 3152316 (1964-10-01), Baxter et al.
patent: 3813657 (1974-05-01), Henry
Caldwell John W.
Groody James J.
Jacobson Harvey B.
O#Brien Clarence A.
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