Sun compass

Details Sun compass Sun compass

1975-10-22

1977-06-14

Aegerter, Richard E.

Geometrical instruments

Straight-line light ray type

Celestial

G04B 4902, G04B 4904

Patent

active

040288137

ABSTRACT:
A sun compass comprises a base, including a transparent hemisphere, a body movable within the base, and a plate including a dial face movable upon the body. Actuating members are connected to the plate and body for selectively moving the plate relative to the body and moving the body relative to the hemisphere. The actuating members are accessible externally of the hemisphere and include rotatable knobs having scales associated therewith for indicating the amount of movement of the plate and body. A transparent hemispherical top is mounted over the base hemisphere.

REFERENCES:
patent: 281527 (1883-07-01), Larsen
patent: 303118 (1884-08-01), Christian
patent: 794787 (1905-07-01), Crehore
patent: 1674161 (1928-06-01), DeBogory
patent: 2192750 (1940-03-01), Mead
patent: 3417473 (1968-12-01), Troseth

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