World time device

Details World time device World time device

1989-10-16

1991-10-01

Roskowski, Bernard

Horology: time measuring systems or devices

Plural time zones

With movable disk display

368 21, G04B 1922

Patent

active

050540084

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.

REFERENCES:
patent: 557173 (1896-03-01), Thompson
patent: 594410 (1897-11-01), Margolis
patent: 718579 (1903-03-01), Pheils
patent: 2128970 (1938-09-01), Smyser et al.
patent: 2615298 (1952-10-01), Ferrari
patent: 4502789 (1985-03-01), Heath

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