Abstract: An electromechanical short interval timer has an actuating dial which can be manually rotated from a rest position to establish a time-elapse period. An electric motor returns the dial to its rest position. A timing circuit delivers electric pulses to drive the motor. A frequency selector switch is connected to or within the timing circuit whereby the pulse frequency can be varied. In this way, the time elapse period which is set by a given amount of dial rotation can be varied in a simplified manner. The dial activates a signal emitter before reaching its rest position, and simultaneously activates a timer circuit to continue returning the dial to its rest position. The dial engages a movable stop at both ends of its 360 degree travel stroke which assumes that the dial travels exactly 360 degrees.

Abstract: An electric, particularly battery-operated timing clock which includes electric time setting components for an electrical switching device arranged about a clock dial. A signal emitter is adapted to be actuated by the switching device. In order to actuate the signal emitter at preselectable time periods, a contact switch element which rotates about the hour-hand shaft of the clock forms, through a contact path and a slide contact, one pole of the switching device, the other pole of which is formed by an electrically-conductive segmented ring with radial segments. Each segment includes a free end actuatable through a latchable setting component, and a contact finger which projects into the path of movement of the contact switch element upon actuation of the free end.