An all electronic watch has an analog minute and hour display comprising two concentric circles of radially disposed LEDs which are energized sequentially in a manner to simulate the movement of the minute and hour hands of a mechanical watch, and a centrally located digital display of date. The circuitry for energizing the LEDs of the analog minute and hour display and the digital date display comprise up-down counters. Amendment of time in a forward direction or in a backward direction is effected by switches actuated by the crown of the watch to feed fast pulses to the counters to operate the counters in a forward direction or in a backward direction as desired. The crown has two operational positions and is rotatable selectively in opposite directions in the manner of a mechanical watch to effect time and date amendment forwardly or backwardly.

An electronic timepiece circuit for automatically changing the day of the week by utilizing the timekeeping signals produced by the day counter, month counter and year counter is provided. Remainder circuitry is coupled to the respective day, minute and year counters and is adapted to sum bit signals representative of the binary count of the respective day, month and year counters and divide the summed bit signals by a count of seven and thereby produce a remainder signal. The remainder signal is applied to appropriate decoding and display circuitry to effect a display of the day of the week in response to the remainder signal applied thereto.

In a switch mechanism for an electronic timepiece, stationary switch electrodes are fitted in openings provided in a dielectric base plate. Movable contacts on a pivoted switch lever extend into the openings and are normally out of contact with the electrodes. The switch lever is movable by operation of the watch stem to bring one or another of the movable contacts into engagement with the respective electrode and thereby close the circuit, for example for adjusting the hour and minute displays of the timepiece. This construction permits making the timepiece thin.

A click mechanism for a timepiece winding stem comprises a plurality of circumferential grooves axially spaced along the length of the winding stem, and a detent spring resiliently engageable within respective ones of the grooves to retain the winding stem in the desired axial operating position and enabling manual axial movement of the winding stem between different operating positions with a click action. The detent spring has an elongate portion which extends in side-by-side relationship along the length of the winding stem, and a detent portion connected to the elongate portion for engagement with the winding stem grooves. The thickness of the detent spring is no greater than the thickness of the winding stem and by arranging the two in side-by-side relationship, a thinner timepiece can be formed than would be possible if the detent spring extended above or below the winding stem.

A process and circuit for the setting of an electronic digital display for a desired time period, particularly the cooking time of a microwave oven. The setting is effected through a series of stepping pulses controlling the registers of counter-display units for a time period which is subdivided into predetermined time units.