An electronic timepiece having a calendar mechanism for displaying a date or date and day includes circuitry for detecting the timing or the movement of the calendar mechanism and for generating a detecting signal. The timepiece also includes means for controlling the electric power supplied to energizing means for the calendar mechanism when the detecting signal is supplied.

A miniature electric stepping motor comprising a magnetized rotor adapted for rotation in the air gap of a stationary magnetic circuit having an electric excitation coil connected to a control device. The control device cmprises means for applying to the excitation coil control impulses of a first polarity and of an amplitude and a width such that the rotor rotates in a first direction of rotation from one stable equilibrium position to the next one and means for applying to the excitation coil,...

An electronic wristwatch in which time is displayed by means of a plurality of separately sealed, independently rotatable, coplanar concentric rings. Each ring carries a plurality of magnetic domains and is independently stepped by a set of electromagnets driven by a multiphase pulse train. Typically, each ring is stepped at a different rate so as to display a different unit of time, this being achieved by suitably scaling the frequencies of the multiphase pulse trains which drive the different ...

The timepiece comprises an oscillator (1), a frequency divider (2), a control circuit (3), a stepping motor (4), a seconds hand (5), a circuit (7) for detecting steps missed by the motor, an up-down counter (15) having a capacity N, and a flip-flop (16). At each missed step the detecting circuit (7) generates a tally pulse (S.sub.7) which increments the counter (15). The latter is also decremented by periodic pulses appearing on the B output of the frequency divider (2). When a cell supplying th...

A world timepiece having means for controlling the time correction of the fundamental time that the fundamental time is interlocked to the time of a region having time difference when the correction amount is shorter than a time-differential unit time (thirty minutes or one hour), and is not interlocked when the correction amount is equal to the multiple of the time-differential unit time.

A circuit arrangement for a quartz controlled electrical clock comprising an oscillator stage a frequency divider separated from the oscillator stage by a gate controlled by a control logic unit, an output stage connected to the frequency divider and a stepping motor connected to the output stage, the control logic unit responding to a command signal to open the gate and disconnect the oscillator stage from the frequency divider with the frequency divider retaining its memory content at the inst...

A step second timepiece comprises a quartz crystal oscillator and a frequency divider containing a reset circuit. The reset circuit includes a reset switch operable such that the time interval from when the reset switch is released up to when the next pulse is fed from the frequency divider is shorter than the pulse interval of the successive pulses fed from the said frequency divider thereby compensating for time lag associated with the release of the reset switch.

An electric timepiece having an electro-mechanical transducer for driving a mechanical time display arrangement intermittently in response to a pulse signal applied to the transducer from an electric driving circuit. A regulating device is provided having an externally and coordinately operated mechanical control member and reset switch adapted to apply a pulse of a polarity suitable to energize the transducer one second after the reset switch is returned to its normal position from its resettin...

A multi-functional electronic timepiece has a melody function to play a musical piece and musical hand operation function to operate hands in a normal or reverse rotating direction in match with the sound emission. A plurality of basic hand operation patterns are prepared in a ROM and a predetermined number of basic hand operation patterns are selected in accordance with pattern selecting data which is easily able to change by manufacturer or user to operate hands in match with various musical p...

A reversible pulse-motor driving circuit comprising a steady driving circuit composed of an oscillator circuit, a frequency divider circuit, a waveform conversion circuit, and a driving circuit, and a fast correction driving-circuit composed of a fast correction set-circuit, a first gate circuit, a detector circuit, a normal and reverse discrimination circuit, a conversion change-over circuit, a pulse selector circuit, a first memory circuit, a second gate circuit and a second memory circuit, wh...