US 5,054,008 AGranted

World time device

OwnerDwight Darlinginventor

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Abstract

A device for determining the time anywhere in the world, simultaneously, relative to any selected geographical location. A circuit map is positioned over a frame and is rotatable in a clockwise direction relative to the frame, the map being a south pole projection of the world. The map rotates about the center point of the map corresponding to the south pole. Twenty-four evenly spaced first time zone positions are provided on the frame beyond the outer boundary of the map and together they define a circle which is outwardly concentric with the map. Twenty-four evenly spaced second time zone positions are provided on and around the perimeter of the map so as to define a second circle between and concentric with the circle defined by the first time zone positions and the map. Each first and second time zone position corresponds to a distint hour of a twenty-four-hour time period. Land areas of the map and their associated second time zone positions are visually coded (for example, color coded) to correspond to distinct time zones. To operate the device the map is rotated in a clockwise direction to align the second time zone position associated with a pre-selected land area with the corresponding first time zone position and, by associating first and second time zone positions and corresponding land areas by means of the visual coding, an identification is made of the distinct hour relative to the pre-selected land area which corresponds to a selected land area.

Claims5

Dependent claims

A device for determining the time in any location in the world relative to a selected geographical area, said device comprising:

(i) a frame;
(ii) a circular world map positioned over said frame and rotatable relative to said frame, wherein said world map which includes a modified south pole projection of the world rotates about the center point of said map corresponding to the south pole and is divided into twenty-four geographical time areas according to the local time, wherein said geographical time areas are colour coded such that each adjacent area differs in colour;
(iii) a first time zone identifier defined by a circle located on said frame and substantially concentric with said map, said first time zone identifier being substantially evenly divided into twenty-four segments marked with your indications as for a calibrated twenty-four hour clock scale;
and
(iv) a second time zone identifier defined by an annular band located around the perimeter of said rotatable circular map, said second time zone identifier being evenly divided into twenty-four segments distinguished by a different adjacent colour, wherein every said second time zone segment is associated with a proximate geographical time area having the same colour;
whereby aligning a second time zone segment associated to said selected geographical area to a first time zone segment according to the known local time of said selected geographical area, the actual local hour of said any location in the world can be identified by reading the hour indication on the first time zone identifier which is adjacent to a second time zone segment associated with said any location in the world.

3 more elements

Dependencies are inferred from the claim text.