Glide path lighting system

Details Glide path lighting system Glide path lighting system

1977-05-17

1980-09-09

Caldwell, Sr., John W.

Communications: electrical

Selective

Having indication or alarm

340383, 350206, 361351, 361361, B64F 118, F21V 1108

Patent

active

042220270

ABSTRACT:
Disclosed is a glide path lighting system which is provided with a lens, a light source, and a screen whether or not constructed as a color filter disposed in the focal plane of the lens between the lens and the light source. The lens is provided with a diaphragm having an opening which is wider in the horizontal direction than in the vertical direction.

REFERENCES:
patent: 1301264 (1919-04-01), Hochstetter
patent: 1605016 (1926-11-01), Trezise
patent: 2142297 (1939-01-01), Albersheim
patent: 3191146 (1965-06-01), Mitchell
patent: 3447129 (1969-05-01), Birmingham et al.
patent: 3457400 (1969-07-01), Appeldorn
patent: 3648229 (1972-03-01), Burrows et al.

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