Patent ID: 6523270
Filing Date: 2003-02-25
Classification: G04B

Abstract:
An apparatus for use with a source of light, said apparatus comprising:a first orientation device including a latitude scale, a latitude pointer rotatable about a first axis relative to said latitude scale, and a platform configured to support an architectural model, said platform being mounted on said latitude pointer such that rotation of said pointer about said first axis produces a corresponding change in the position of said platform relative to said latitude scale; a second orientation device including a time scale and a time pointer rotatable about a second axis relative to said time scale, said first orientation device being mounted on said time pointer such that rotation of said time pointer about said second axis produces a corresponding change in the position of said platform relative to said time scale without changing the position of said platform relative to said latitude scale; and a third orientation device including a day of the year scale, a gnomon operatively oriented relative to said day of the year scale, and a universal joint supporting said third orientation device for movement relative to a source of light; said second orientation device being mounted on said third orientation device such that movement of said third orientation device on said universal joint produces a corresponding change in the position of said platform relative to the source of light without changing the position of said time pointer relative to said time scale or the position of said platform relative to said latitude scale.