| 摘要 |
PCT No. PCT/CH87/00069 Sec. 371 Date Feb. 16, 1988 Sec. 102(e) Date Feb. 16, 1988 PCT Filed Jun. 17, 1987 PCT Pub. No. WO87/07966 PCT Pub. Date Dec. 30, 1987.Through an opening (2) in a dial (1), the hub (3) of a follower disc (4) extends. Placed on the end of the hub (3) is an alarm-setting hand (6) for reading the alarm time. The hub (3) is traversed by an hour-wheel pipe (7) which has two flattened side surfaces (23) for rotation-tight connection to a sliding wheel (12). A printed circuit board (14) is disposed adjacent to the hour-wheel (8) and has an opening (15) through which the hour-wheel pipe (7) extends. Two circular conductor paths (17, 18) disposed concentrically with the hour-wheel pipe (7) are applied to the printed circuit board (14). Between the sliding wheel (12) and the printed circuit board (14), an alarm-setting wheel (13) is rotatably disposed. The sliding wheel (12) has a recess (24) in which a contact bridge (26) is disposed. The alarm-setting wheel (13) has an aperture (38) disposed above the said conductor paths (17, 18), recesses (35) into each of which a lug (5) of the follower disc (4) projects, and an outer toothing (34) engaged by a pinion (36) for setting the alarm time. At the alarm time set, the free ends of the contact bridge (26) reach the conductor paths (17, 18) through the aperture (38) in order to connect these paths electrically to one another for triggering an alarm signal. This makes it possible to use a simple embodiment of a contact bridge which can be inserted in the alarm clock fully automatically, no subsequent adjustment being necessary.
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