Universal timepiece from which latitude and longitude can be determined

摘要

A universal timepiece from which a latitude and a longitude can be determined. A bottom plate which has the names of the main cities in the world, scales and the relative longitudes according to the real longitudes of the cities on the circumference thereof, is included. Comprised is a circular hour plate which has a 24-divisional scale having the same angles with respect to the center. And a circular star plate which rotates 360.99 per 24 hours is included. The rotational axis coincides with the Polaris or the south pole and the main stars and a concentric circle for representing the declination are designated in the star plate. At each concentric circle, the declination or the value obtained by subtracting the declination from 90 is recorded. The clock plate rotates to indicate the time. The star plate is the timepiece which rotates in the same velocity with the actual celestial sphere. The timepiece of the present invention can be utilized as the universal timepiece and the rotation of the earth can be indirectly observed regardless of day and night. The latitude, the longitude and the present time can be advantageously and correctly appreciated.