Reflected spot sundial

Details Reflected spot sundial Reflected spot sundial

1992-02-06

1993-03-30

Will, Thomas B.

Geometrical instruments

Straight-line light ray type

Celestial

33269, G04B 4902

Patent

active

051971992

ABSTRACT:
A sundial is described using a mirror to reflect an indexing spot of sunlight onto the back of a translucent dial face that is marked with time and date indicia. Adjustments are provided so that a sundial designed for any location can be used in another location and still provide accurate zone time and date.

REFERENCES:
patent: 89585 (1869-05-01), Johnson
patent: 165746 (1875-07-01), McCoy
patent: 1289837 (1918-12-01), Love
patent: 4346521 (1982-08-01), Luft
patent: 4373270 (1983-02-01), Ousley
patent: 4384408 (1983-05-01), Bohlayer
patent: 4520572 (1985-06-01), Spilhaus
patent: 4835875 (1989-06-01), Fuller
patent: 4945644 (1990-08-01), Fuller

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