Electric apparatus with silent alarm

Details Electric apparatus with silent alarm Electric apparatus with silent alarm

1989-06-22

1991-06-11

Miska, Vit W.

Horology: time measuring systems or devices

Displays or display device details

Dial or hand

368250, 368255, 310316, G04B 1906, G04C 2100

Patent

active

050238531

ABSTRACT:
A timepiece in which a vibration member starts vibration at an alarm time to let a person know the alarm time. The timepiece comprises a case having a shape of thin, small-sized wrist watch form, timekeeping circuit for counting a present time, alarm circuit for setting alarm time, detection circuit for detecting a coincidence a present time with the alarm time and the vibration member actuated at a set time to indicate time. The vibration member comprises a ultrasonic wave motor and an eccentric weight wheel driven by the ultrasonic motor and having its center of gravity deviated from its axis. The whole timepiece is vibrated by the unbalanced centrifugal forces produced by the turn of the weight wheel at the set time to indicate the time.

REFERENCES:
patent: 4456387 (1984-06-01), Igarashi
patent: 4723085 (1988-02-01), Mukohjima et al.
patent: 4727276 (1988-02-01), Izukawa et al.
patent: 4829209 (1989-05-01), Kawasaki et al.
patent: 4833359 (1989-05-01), Tanoue et al.

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