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AssigneeKundo-Kieninger & Obergfell
InventorWolfgang Fehrenbacher
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A device for setting the time of actuation of a buzzer or other signal generator in an alarm clock comprises a flexible stem of a manually operable knob, rotatably journaled in two mounting plates, which carries a pinion normally engaging gear teeth of a disk freely rotatable about the hour shaft of the clockwork, the disk being under axial spring pressure urging it against an adjacent hour wheel which has one or more cutouts adapted to receive respective sawtooth-shaped cams on a confronting disk face when the wheel reaches the selected angular position. The user may turn the knob in either direction to advance or delay the selected time setting, except that any delay of 12 hours or more from the time of resetting is prevented by the interengagement of a steep cam flank with an edge of the associated cutout. If the user neverless turns the knob beyond that limit, the stem yields laterally and disengages its pinion from the disk teeth to obviate any damage to the mechanism.
In a timepiece provided with a clockwork, alarm means including a normally inactive signal generator, a control member coupled with a manually rotatable presetting element and juxtaposed with a coacting member of said clockwork making not more than two revolutions every 24 hours, said members being provided with mating formations alignable in one predetermined relative angular position thereof, biasing means for shifting one of said members from a normal position into an off-normal position upon alignment of said formations, and activating means operable by said one of said members in said off-normal position thereof for setting off said signal generator, interengagement of said formations preventing entrainment of said control member by said presetting element in one direction of rotation,
Dependencies are inferred from the claim text.