Timekeeper with automatic time setting and time setting method for same

A timekeeper comprising:

• a timebase having internal time data;
• a display for displaying time data supplied by said timebase;
• a time setting mechanism for correcting said time data;
• a radio reception device configured to deliver radio data system (RDS) data derived from an RDS spectrum received from a frequency modulated transmitter supplying the RDS data except for the frequency band containing the RDS data;
• an RDS decoder configuerd to receive the RDS data delivered from said radio reception device and to decode only local time data in said RDS data;
• a controller which, on the basis of the delivered RDS data, controls said time setting mechanism to ensure time setting of the timekeeper, said controller including,
• a receiver for receiving a first transmission signal containing RDS data from a first frequency modulation transmitter;
• an analyzer configured to extract first local time data from said first signal and to compare said first local time data with the internal time data supplied by said timebase;
• said receiver receiving a second transmission signal containing RDS data from a second frequency modulation transmitter in the event of any discrepancy between the first local time data and the internal time data;
• and
• said analyzer configured to extract second local time data from said second transmission signal, compare the second local time data to the first local time data, and set the time of said timekeeper to cancel said discrepancy only if the first local time data is equal to the second local time data;
• and
• said timekeeeper configured to be worn during use.

A method of setting a timekeeper to the correct time by radiosynchronization, comprising the steps of:

• receiving by said timekeeper a first transmission signal of a first frequency modulation transmitter whose spectrum contains RDS data, said timekeeper being adapted to be worn;
• rejecting baseband audio spectrum received from said first transmitter except for the band of frequencies containing the RDS data;
• demodulating the RDS data and extracting first local time data from said first signal;
• comparing said first local time data with internal time of said timekeeper;
• in the event of a discrepancy between the first local time data and the internal time, receiving by said timekeeper at least a second transmission signal of a second frequency modulation transmitter containing RDS data;
• rejecting baseband audio spectrum received from said second transmitter except for the band of frequencies containing the RDS data;
• demodulating the RDS data and extracting second local time data from said second signal;
• comparing said second local time data with said first local time data;
• and
• setting the time of said timekeeper to cancel said discrepancy only if the first local time data is equal to the second local time data.