Time conversion clock

Details Time conversion clock Time conversion clock

1989-06-08

1990-11-20

Miska, Vit W.

Horology: time measuring systems or devices

Plural time zones

368 25, 368 27, G04B 1922

Patent

active

049723928

ABSTRACT:
A time conversion universal clock includes a time conversion transmission mechanism having one output connected with a time recording element, and another output coupled with a universal time zone map, so that the time recording element drives the universal time zone map in a counter-clockwise direction of rotation. The universal time zone map displays at least some of the world's geographical regions in a polar projection in terms of time zones corresponding thereto. A time conversion transmission mechanism of the time conversion universal clock has a rotary input at a first rotation rate, and provides a rotary output at a second rotation rate; the ratio of the first to the second rotation rates is defined as a transmission ratio, which is made equal to 0.5 by two pulleys, or, alternately gearwheels, of a coupling device of the time conversion mechanism, which engage one another, and have a diameter ratio of two. The hour hand of the universal clock thus covers 12 hours in one turn, while the universal time zone map covers the same 12 hours in half a turn. In an alternate embodiment, the geographical regions are shown stationary in a Mercator projection, while the moving time-indicating numerals are juxtaposed with the respective geographical regions and time zones corresponding thereto. Time for a respective time zone, and optionally for the geographic region corresponding to that time zone is displayed by the stationary geographic regions and time zones corresponding thereto being juxtaposed with the corresponding moving numeral.

REFERENCES:
patent: 975877 (1910-11-01), Law
patent: 1153492 (1915-09-01), Hoijinga
patent: 2024066 (1935-12-01), Segova
patent: 2144922 (1939-01-01), Jacobs
patent: 2635414 (1953-04-01), Cettier
patent: 3226926 (1966-01-01), Kilburg
patent: 3918251 (1975-11-01), Wakabatashi

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