Horology: time measuring systems or devices – Signalling means – Time condition responsive
Patent
1981-07-30
1984-04-03
Isen, F. W.
Horology: time measuring systems or devices
Signalling means
Time condition responsive
368204, G04C 2116
Patent
active
044405049
ABSTRACT:
An electronic timepiece including a piezoelectric type alarm buzzer wherein the caseback functions as the buzzer diaphragm is provided. The piezoelectric element is mounted on the caseback and a battery for driving the timepiece is mounted on the piezoelectric element with an electrical insulating member therebetween for preventing short-circuiting between the battery and piezoelectric element. In an exemplary embodiment, the electrical insulating member for mounting for holding the battery is mounted to the piezoelectric element at a peripheral portion in order not to effect adversely the sound level. Alternatively, when design considerations require the battery may be mounted in a more central portion of the piezoelectric element, an angular insulating member having a central opening is used so that the insulating member contacts the piezoelectric element at the periphery thereof.
REFERENCES:
patent: 3780522 (1973-12-01), Yoshida
patent: 3879931 (1975-04-01), Yasuda et al.
patent: 3992870 (1976-11-01), Dekel
patent: 4051665 (1977-10-01), Arn
patent: 4068461 (1978-01-01), Fassett et al.
patent: 4250573 (1981-02-01), Saito
Isen F. W.
Kabushiki Kaisha Suwa Seikosha
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