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US 5,197,199 AGranted
Reflected spot sundial
OwnerWilliam W. Shraderinventor
Life of this patent
Estimating the term…
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.
Claims10
A sundial comprising:
- (a) a translucent dial face having a front and back with time indicia, in said dial face placed to have the back of the dial face positioned toward the sun;
- and
- (b) means placed behind said translucent dial face for reflecting a sun beam received from the sun in back of said sundial as a spot onto the back of said translucent dial face so that time can be ascertained by observing on the front of said translucent dial face the location of said reflected spot with respect to lines of said time indicia.
Dependencies are inferred from the claim text.