Method and apparatus for accurate time maintenance and display

摘要

A highly accurate time keeping device and time keeping system are disclosed. Time of day information is periodically sent to a wristwatch via radio signal. The time of day as displayed by the watch is updated periodically using the radio signal data and maintained between such periodic updates according to an algorithm of the present invention. The disclosed time keeping system thereby maintains a plurality of time keeping devices in substantially exact synchronization over an extended period.