Abstract: An autonomous radio timepiece (11) with a magnetic antenna (14) located in the vicinity of a electromechanical transducer (25) for driving a time display (19), in order to obtain a radio timepiece with a small volume and operable in a compact manner. To avoid electromagnetic interference with the antenna inlet of a tuned radio-frequency receiver (12), the transducer (25) is deactivated while the receiver (12) is actuated for the reception and coding of an absolute time information (15) transmitted by radio. A subsequent recovery of the transducer drive pulses (42) for autonomous time keeping corrects the display (19). However, a transducer (25.

Abstract: An autonomous radio timepiece comprises a casing and a bracelet attached thereto. The casing includes an operating circuit, while the bracelet carries a flexible antenna. The antenna can be removed from the bracelet in the event that the bracelet is worn and must be discarded. The antenna carries a plug-in type connector at one end which is adapted to make a tight sealing connection with the casing, and is also adapted to electrically connect the antenna with the circuit of the casing. The circuit within the casing includes a receiver which is fixedly tuned as a function of the antenna inductivity of a foil core to the time message transmitter. Also provided is a variable automatic supplemental tuner to compensate for bending of the bracelet while the receiver is actuated. The antenna comprises a foil of an insulting material on which an antenna conductor is printed, along with two shielding conductors extending parallel to the antenna conductor.

Abstract: A solar timepiece comprises a drive unit including a commercially available battery clock mechanism mounted to the back of a support plate for the solar cells. The clock mechanism includes hands arbors which pass through an opening in the support plate. The support plate is angularly adjustable about the axis of the hands arbors so that the longitudinal extent of the solar cells can be made to coincide with the decoratively adapted orientation of light passage areas in the dial face located directly in front of it.