Alarm clock having means for bridging two circular conducting paths via an adjustable contact means thereby causing generation of an acoustic alarm system

An alarm clock comprising:

• a movement;
• a printed circuit board for receiving electronic components;
• an alarm signal device for generating an acoustic alarm signal;
• an adjustable contact means for putting the alarm signal device in operation;
• switch means for shutting off the alarm signal generation;
• said printed circuit board (14 or 75) having an opening through which an hour-wheel pipe (7 or 59) of the movement extends, characterized in that on the printed circuit board (14 or 75) there are two circular conductor paths (17 and 18 or 78 and 79) disposed concentrically with the hour-wheel pipe (7 or 59);
• means for mounting the adjustable contact means;
• means for bridging the circular conductor paths thereby initiating generation of the acoustic alarm signal;
• wherein,
• said means for mounting the adjustable contact means includes:
• a settable alarm-setting wheel (55) rotatably placed on the hour-wheel pipe (59), the adjustable contact means is connected rotation-tight to the alarm-setting wheel (55) and has two wipers (78 and 79) connected via a crosspiece (91);
• said means for bridging the circular conductor paths includes:
• an hour-wheel (60) rigidly connected to the hour-wheel pipe (59), the hour-wheel pipe (60) having at one location an aperture (80) through which the ends of the wipers (93 and 94) pass at a time set by means of the alarm-setting wheel (55) thereby bridging the circular conductor paths (78 and 79) and initiating generation of the acoustic alarm signal;
• and said adjustable contact means (84) has a circular portion (85), from the circular portion (85) at least three legs (87) extend in a radial direction toward the hour-wheel (60), in the circular portion (85) there is an arcuate slot (86) which extends over an angle of about 100, an arch piece (90) bounding the arcuate slot (86) outwardly, is bent at both ends at two places, so that a region of the arch piece (90) between its ends lies in a different plane than the circular portion (85), an arm (91) extends radially outwardly from the arch piece (90), having wipers (93 and 94) disposed thereon, the arm (91) having at opposite locations a tongue (92) extending tangentially and at an angle to the alarm-setting wheel (55).