Patent ID: 6243324
Filing Date: 2001-06-05
Classification: G04B

Abstract:
A universal digital time disk comprising:a plurality of concentric circular charts; whereinan innermost chart is divided into twenty-four innermost radial sections, said innermost sections representing twenty-four time zones, each said innermost section being designated with an easily recognized landmark included in the time zone represented by said innermost section, said innermost chart further including designations for at least the international date line, the Greenwich meridian, and for time zones in India and Iran,a second chart outside said innermost chart is divided into four second sections, said second sections representing respectively Europe and Africa, Asia, Australia, and America,a third chart outside said second chart is divided into twenty-four third sections, said third sections being numbered one through twenty-four,a fourth chart outside said third chart is divided into twenty-four fourth sections, said fourth sections each include a centered pointing element,a fifth chart outside said fourth chart is divided into one hundred forty-four fifth sections, said fifth sections each represent a ten minute interval, anda sixth chart outside said fifth chart includes equally spaced designations for twenty-four hours; such thata user of said time disk is able to easily and rapidly determine time and date differences between a first reference geographical location and any other desired geographical location.