Horology: time measuring systems or devices – Chronological – With mechanical or electromechanical driven display
Patent
1995-11-21
1997-01-21
Miska, Vit W.
Horology: time measuring systems or devices
Chronological
With mechanical or electromechanical driven display
368 82, 368223, 368239, 33270, G04B 4900, G04C 1900, G01C 1734
Patent
active
055965539
ABSTRACT:
A sundial gnomon including a first surface having a plurality of parallel first surface apertures transmissive to light and through which a plurality of sunbeams pass, and a second surface having a plurality of second surface segment apertures for regulating the passage of sunbeams passing through the plurality of first surface apertures. The plurality of second surface segment apertures are arranged in a plurality of stencil patterns, each stencil pattern including a plurality of second surface segment apertures. The plurality of second surface segment apertures are configured to cause sunbeams passing through the plurality of first surface apertures to be incident upon second surface segment apertures of only one stencil pattern at a given time. Thus, sunbeams passing through the two surfaces will display the hour of the day. Preferably, the gnomon includes a second set of surfaces having apertures therein through which sunbeams pass to respectively display portions of an hour such as 10 minute intervals.
REFERENCES:
patent: 2931102 (1960-04-01), Thew
patent: 4225864 (1981-03-01), Glenoinning
patent: 4279031 (1981-07-01), Dostoomian
patent: 4387999 (1983-06-01), Shelley
patent: 4782472 (1988-11-01), Hines
Boon, "Digital Sundial-Solar Clock", .COPYRGT. 1981.
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