Apparatus for providing a representation of celestial bodies

Claim 1

A PLANISPHERE FOR PROVIDING A REPRESENTATION OF CELESTIAL BODIES VISIBLE AT A SELECTED TIME ON A SELECTED DATE COMPRISING A PLURALITY OF CONCENTRIC DIALS, A CENTRAL PIN TO WHICH THE CONCENTRIC DIALS ARE SEPARATELY ROTATABLE, THE WHICH THE CONCENTRIC DIALS ARE SEPARATELY ROTATABLE, THE FIRST RADIALLY SMALLER OF THE DIALS BEING MASK AND HORIZON CONTROL DIAL INCLUDING AN ELLIPTICAL PORTION THROUGH WHICH THE SECOND DIAL IS VIEWABLE REPRESENTING THE HORIZON OF AN OBSERVER AT A PREDETERMINED LATITUDE, THE REST OF THE FIRST DIAL ACTING AS A MASK FROM VIEW REPRESENTATIONS OF CELESTIAL BODIES NOT VISIBLE AT A SELECTED TIME ON A SELECTED DAY WHICH ARE REPRESENTED ON THE SECOND DIAL AND HAVING OPPOSITELY POSITIONED VIEW AND SUN ARROW INDICATIONS THEREON, THE SECOND DIAL BEING RADIALLY LARGER THAN THE FIRST DIAL AND IN SURFACE-TO-SURFACE CONTACT THEREWITH AND INCLUDING THEREON A PLANAR REPRESENTATION OF THE CELESTAIL BODIES VISIBLE FROM THE PREDETERMINED LATITUDE WITH THE PIVOT PIN AS THE POLAR AXIS, SAID SECOND DIAL INCLUDING AROUND THE PERIPHERY THEREOF A DATE SCALE AND A DEGREE AND HOURS OF FIGHT ASCENSION SCALE, A THIRD DIAL BEING RADIALLY LARGER THAN THE SECOND DIAL AND POSITIONED IN SURFACE-TO-SURFACE CONTACT WITH THE SECOND DIAL ON THE OPPOSITE SIDE THEREOF FROM THE FIRST DIAL AND INCLUDING A SOLAR CLOCK SCALE AROUND THE OUTER PERIPHERY THEREOF AND MEANS CONNECTED TO THE PLANISPHERE FOR DIRECTLY DETERMINING THE TIME BEFORE A PARTICULAR CELESTIAL BODY REPRESENTED ON THE SECOND DIAL WILL BE PRESENT AT A VIEWING MERIDIAN.