Abstract: An electrical switch device for detecting preset alarm times in an alarming device comprises a one-piece switch part connected to and rotatable with a rotationally driven time wheel, and first and second fixed switch parts electrically insulated from each other. An alarming circuit is electrically connected to the fixed switch parts and sounds an audible alarm when the switch parts are closed. An alarm time setting mechanism is settable in a predetermined angular position corresponding to the alarm time to be detected so that when the time wheel is driven to the predetermined position, the switch parts are closed thereby activating the alarm.

Abstract: An alarming device for a clock comprises a manual selector for setting the desired alarm time. An alarm time setting detecting mechanism coacts with the rotationally driven time wheels of the clock for detecting the preset alarm time and thereafter actuates an audible alarm. An alarm time indicating mechanism provides a visual indication of the preset alarm time and includes a notifying mechanism which provides a visual indication indicative of the operative or inoperative state of the alarming device thereby notifying the user as to whether or not the device is set to detect an alarm time. The notifying mechanism comprises ON and OFF indicia which may be selectively illuminated or which may be selectively covered by a masking plate to provide the visual indication.

Abstract: An alarming device for a clock comprises a rotationally driven minute time wheel having plural sets of shift teeth, a rotatable 10-minutes time wheel which intermittently meshes with the shift teeth of the minute time wheel to be driven thereby, and a rotatable hour time wheel which intermittently meshes with the 10-minutes time wheel and is driven thereby. First and second detection devices respectively detect when the 10-minutes and hour time wheels are in predetermined angular positions, and setting means enables setting of the detection devices in predetermined positions. An audible alarm is rendered operative and provides an audible alarm only when the 10-minutes time wheel and the hour time wheel have respectively conformed in phase with said first and second detection devices thereby providing notification of the alarm time.