Autonomous radio clock with time-zone switching - has electro-optical display for indicating geographical time zone of time shown on clock

摘要

The radio clock (11) has a summing register (23) providing absolute time information from a decoded time message (10) An electro-optical display (19) is provided with a graphical portion (96) for display of geographical time zones (x) under the control of the summing register. A switch (21) is provided for changing the contents of the summing register in hour steps. Two switches may be provided for respective adding to, or subtracting from the contents of the register, with the register being reset by simultaneous depression of both switches. ADVANTAGE - Simple interpretation of indicated time zone.