Global clock

Abstract

Abstract PURPOSE:To indicate a local time given a fixed time differential of a desired area according to the area selection signal from the time indication area selection switching means, while a world map is drawn on a clock panel to indicate time and area correspondingly. CONSTITUTION:The commercial power source 1 is pulsed through a pulse forming circuit 2 to discriminate its frequency through a Hz discrimination circuit 3 then to be conducted to the counting circuits 4-6 for putting out a local time output a2 with a fixed time differential of the selected area according to the input of the local selection signal of the time indication area selection switch 8 into a time differential setting circuit 7. A world map 13 is drawn on a clock panel 12, while on the time indication tubes 14 and 15 the outputs a1 and a2 of a Japanese time and the local time of a selected area are respectively indicated, further on the world map 13 the world main areas are shown through the indication marks 16, while on the marginal parts 17 the respective area names are entered corresponding to the indication marks 16.

Inventors

• 👤 Hideo Kikuchi

Bibliographic Details