LIGHT SNARE FOR AIRPLANES
[see NFP] December 30, 1931
LONDON, Jan. 00 (SS), - A cage of light with which to ensnare airplanes
at night; that is what a new form of searchlight invented by Major
J.C. Savage, pioneer sky writer, might be called. Its light is broken
up by a screen which throws a checkerboard design against the sky.
Airplanes caught within the grid of light can easily be followed with
the beam and their height, speed and direction determined. It is said.