Tutorial device for observing lunar phase

Details Tutorial device for observing lunar phase Tutorial device for observing lunar phase

1990-07-16

1992-05-19

Apley, Richard J.

Education and demonstration

Science

Astronomy

434289, 434292, G09B 2300

Patent

active

051143488

ABSTRACT:
The invention provides a tutorial device for observing lunar phase. A base sheet is inscribed with a time scale, a ring of moon pictures and a ring of moon phases. Outer circles on the base sheet define the months, and times of moonrise, moonset and moonsharp. Mounted on the base are a rotary segment shaped moonguide, a globe longitude disc and an elevation disc with a graduated moon angle scale and a pivoted elevation finger. The movable elements are used in conjunction with the fixed rings and circles on the base sheet to obtain moon data for selected times and earth longitudes.

REFERENCES:
patent: 531060 (1984-12-01), Ormsby
patent: 554809 (1896-02-01), Yaggy
patent: 792336 (1905-06-01), Lewis
patent: 2350374 (1944-06-01), Speert
patent: 3290799 (1966-12-01), Eisenhauer

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