Universal sundial

Details Universal sundial Universal sundial

1988-11-09

1990-05-08

Haroian, Harry N.

Geometrical instruments

Straight-line light ray type

Celestial

G01C 100

Patent

active

049226193

ABSTRACT:
A sundial has a scale 3 on the inner face of a single-turn helix 1, and a gnomon 2 which is a rod or wire lying along its axis. The scale is linear and the instrument can be used at substantially any location, regardless of latitude or longitude. It can be advanced for statutory Summer Time, and adjusted to compensate for non-linearity in the sun's apparent movement (`Equation of Time`).

REFERENCES:
patent: 4237611 (1980-12-01), Wurch

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