Timepiece having a star display

Details Timepiece having a star display Timepiece having a star display

1986-10-15

1988-03-15

Miska, Vit W.

Horology: time measuring systems or devices

Astronomical

G04B 1926

Patent

active

047317671

ABSTRACT:
A wristwatch with a star map disk rotatably mounted in a caser and a gear train for rotating the star map disk at a speed of one revolution per one sidereal day. A star map is provided on the star map disk. The star map includes bright and constellation figures in a part of the celestial sphere which are selected from visible stars. The dial of the wristwatch has an opening for defining a range of the star map which is visible when observing.

REFERENCES:
patent: 521725 (1894-06-01), Molesworth
patent: 2657525 (1953-11-01), Allen
patent: 4435795 (1984-03-01), Frank
Popular Science, Jul. 1949, p. 153.

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