Sundial with standard time display

Details Sundial with standard time display Sundial with standard time display

2006-10-03

2006-10-03

Fulton, Christopher W. (Department: 2859)

Geometrical instruments

Straight-line light ray type

Celestial

Reexamination Certificate

active

07114262

ABSTRACT:
A horizontal sundial (1) that can be used to find standard time accurately and be manufactured on a commercial basis for any specific location, incorporating a gnomonic projection map (1M), a wire gnomon (1a) to indicate the time on a scale (1b), and the point of noon on the map (1c), and a bead (1d) located directly above the center of the dial for indicating the Sun's overhead position on the map (1e), and marking special occasions and special dates.

REFERENCES:
patent: 2531932 (1950-11-01), Brown
patent: 4028813 (1977-06-01), Eldridge
patent: 4081911 (1978-04-01), Eldridge
patent: 4924592 (1990-05-01), Fuller
patent: 5197199 (1993-03-01), Shrader
patent: 6308427 (2001-10-01), Kaufmann
patent: 6523270 (2003-02-01), Cheung

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