Device for determining true bearing during daytime

Details Device for determining true bearing during daytime Device for determining true bearing during daytime

1988-05-05

1990-09-18

Will, Thomas B.

Geometrical instruments

Straight-line light ray type

Celestial

33227, G01C 1734

Patent

active

049569201

ABSTRACT:
There is proposed an instrument for determining true bearing during daytime using the sun as a reference preferably for use together and as an attachment to known angular measuring instruments, such as geniometers, the instrument consisting of a shadow producing member to produce a shadow on a reference member. The shadow is to be cast at a predetermined location on the reference member when the shadow producing member is exactly aligned with the sun.

REFERENCES:
patent: 275913 (1983-04-01), Holmes
patent: 538889 (1895-05-01), Arvidson
patent: 686127 (1901-11-01), Potter
patent: 709289 (1902-09-01), Young
patent: 2072565 (1937-03-01), Moehle
patent: 2173545 (1939-09-01), Wall
patent: 2482749 (1949-09-01), Eckert
patent: 2904889 (1959-09-01), France, II

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