Alarm-setting mechanism for timepiece with escapement protecting

Details Alarm-setting mechanism for timepiece with escapement protecting Alarm-setting mechanism for timepiece with escapement protecting

1980-11-21

1983-08-23

Roskoski, Bernard

Horology: time measuring systems or devices

Signalling means

Time condition responsive

368 74, G04B 2302, G04C 2100

Patent

active

044000944

ABSTRACT:
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.

REFERENCES:
patent: 2630671 (1953-03-01), Ross
patent: 2678528 (1954-05-01), Hamm
patent: 2966027 (1960-12-01), Meyer
patent: 3264818 (1966-08-01), Morrison et al.
patent: 3603077 (1971-09-01), Ganter

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