Geographical chronological device

Details Geographical chronological device Geographical chronological device

1997-09-25

1999-06-29

Miska, Vit

Horology: time measuring systems or devices

Astronomical

With sun and earth display

368 27, G04B 1922, G04B 1926

Patent

active

059177780

ABSTRACT:
A geographical chronological device which simultaneously indicates the time in multiple cities or countries, and displays fluctuations in day or night in a geographic location. The earth clock has a semi-transparent world map depicting a polar planetary projection of the world from the north or south pole. An adjustable shadow disk is disposed adjacent to and partly visible through the semi-transparent world map. The shadow disk has a periphery with time indicia disposed about the periphery. The adjustable shadow disk has an adjustable dark portion to indicate night and an adjustable light portion to indicate day. The dark and light portions adjust to indicate relatively greater or lesser night and day according to the change in seasons. A clock movement provides relative movement between the semi-transparent world map and the adjustable shadow disk.

REFERENCES:
patent: 557173 (1896-03-01), Thompson
patent: 594410 (1897-11-01), Margolis
patent: 635268 (1899-10-01), Osse
patent: 862884 (1907-08-01), Connor
patent: 1045304 (1912-11-01), Luporini
patent: 1378085 (1921-05-01), Balch
patent: 2615298 (1952-10-01), Ferrari
patent: 3486322 (1969-12-01), Abend et al.
patent: 3611704 (1971-10-01), Guintos
patent: 4502789 (1985-03-01), Heath
patent: 4579460 (1986-04-01), Shannon
patent: 4759002 (1988-07-01), Cash
patent: 5146436 (1992-09-01), Wright
patent: 5197043 (1993-03-01), Strader
patent: 5448532 (1995-09-01), Kataoka et al.
patent: 5457663 (1995-10-01), Mejaski
patent: 5508979 (1996-04-01), Eisenegger

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