Abstract: A control device for an electronic wrist-watch including a delay means and a pair of flip-flop circuits. The device is actuated by a push button switch and provides one of two possible output conditions dependent upon the length of time for which the push button is depressed.

Abstract: A circuit for electronic watches to enable selection between a 12 hour clock display and a 24 hour clock display. The circuit is driven by the hours counter of a watch and includes a control input for selecting the mode of operation and a logic network having outputs for controlling the display of the tens of hours and, for a 12 hour clock system, for controlling an AM or PM display.

Abstract: A control device for an electronic wrist watch to enable selection of a variety of possible displays. The circuit of the device incorporates means for memorizing an input control signal derived from a pushbutton and logic and delay means for combining the input control signal and the information in the memory means to provide outputs according to the period for which the pushbutton is actuated. The outputs can be used to selectively connect counters to the display means of the watch.

Abstract: A control and correction circuit for an electronic watch involving three push-buttons which are actuable to select and/or correct the information displayed by the watch. The push-buttons provide actuating signals to a delay device and to logic selection circuits which provide outputs to control the counters of the watch circuit. The delay device enables a secondary display to be displayed for a predetermined time after which the device returns to its initial state. During the predetermined time the information displayed may be corrected by actuation of the second or third push-button in which case the secondary display is held unitl the correction operation is complete before returning to its initial condition.