Sundial

Details Sundial Sundial

1977-04-28

1978-07-25

Martin, Jr., William D.

Geometrical instruments

Straight-line light ray type

Celestial

33 1SC, G01C 2102, G01C 1734

Patent

active

041020545

ABSTRACT:
A sundial which is adjustable with respect to its mounting location to correct for its earth location in both longitude and latitude. The sundial is provided with solar time equation indicia and indicator to correct real solar time to mean solar time and includes further indicia to determine the calendar date based on sun declination.

REFERENCES:
patent: 281527 (1883-07-01), Larsen
patent: 1146412 (1915-07-01), Early
patent: 2192750 (1940-03-01), Mead
patent: 2754593 (1956-07-01), Sundblad
patent: 3110108 (1963-11-01), Sundblad

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