The invention provides a rechargeable electronic timepiece that restarts the operation of a clock circuit by inputting a power source, thereby securely confirming the clock operation. The electronic timepiece includes a first power source (2), a clock circ...

Charging a storage cell requires the electromotive force exerted at a photogenerating cell in addition to the voltage equal to or higher than the forward on voltage developed at an backflow preventing diode. Therefore, the charging is inefficient. Moreover...

A diving computer provides not only a digital, but also a graphic display of depth for a safety stop and a decompression stop, thereby providing a safe diving watch enabling prompting of a diver for simple maintenance of depth, and has a timekeeping means ...