1976-12-20
1978-01-24
Schaefer, Robert K.
58 38R, G04B 2904
Patent
active
040696588
ABSTRACT:
An alarm setting device for timepieces consisting of a primary alarm setting wheel which engages an alarm hand wheel, a primary time wheel which is provided on the same shaft as the primary alarm setting wheel and which is driven by a wheel train of the timepiece, a primary cam mechanism which includes projections and engaging slots provided on the primary time wheel and in the primary alarm setting wheel, a secondary alarm setting wheel which engages with the primary alarm setting wheel, a secondary time wheel which is provided on the same shaft as the secondary alarm setting wheel and which is driven at a higher rate than that of the primary time wheel by a wheel train of the timepiece, a secondary cam mechanism which includes projections and engaging slots provided on the secondary time wheel and in the secondary alarm setting wheel and whose dropping and riding-up actions follow those of the primary cam mechanism, and a contact device which contains a movable part which is engaged by the primary and secondary time wheels and activated by the primary and secondary cam mechanisms and in which the on-off condition of the contact device is controlled by the movable part.
REFERENCES:
patent: 2779150 (1957-01-01), Chartier et al.
patent: 3387452 (1968-06-01), Ring et al.
patent: 3498046 (1970-03-01), Jepson et al.
patent: 3603074 (1971-09-01), Ganter
patent: 3783599 (1974-01-01), Tanaka
patent: 3996734 (1976-12-01), Kitai et al.
Miska Vit W.
Rhythm Watch Co. Ltd.
Schaefer Robert K.
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