Horology: time measuring systems or devices – Chronological – With simultaneous time indicating means
Patent
1978-08-11
1982-09-28
Miska, Vit W.
Horology: time measuring systems or devices
Chronological
With simultaneous time indicating means
368204, 368250, 340384E, G04B 2302, G04C 300, G08B 300
Patent
active
043521690
ABSTRACT:
An electronic timepiece having a liquid crystal display device and a buzzer comprised of a piezoelectric element. A voltage booster circuit comprised of a capacitor and a semiconductor switching element boosts the voltage of the voltage supply, and the boosted voltage is applied to drive the liquid crystal display device. A buzzer driving circuit inverts the booster voltage and simultaneously applies the booster voltage and the inverted booster voltage to drive the piezoelectric buzzer element. The operating frequency of the voltage booster is increased when the buzzer is operated and when the booster voltage and inverted booster voltage are applied to energize the piezoelectric buzzer element.
REFERENCES:
patent: 3886924 (1975-06-01), Kamya
patent: 3975896 (1976-08-01), Kasama
patent: 3979899 (1976-09-01), Yoshida et al.
patent: 4023050 (1977-05-01), Fox et al.
patent: 4029973 (1977-06-01), Kobayashi et al.
patent: 4044546 (1977-08-01), Koike
patent: 4045691 (1977-08-01), Asano
patent: 4061929 (1977-12-01), Asano
patent: 4068461 (1978-01-01), Fassett et al.
patent: 4098071 (1978-07-01), Kawakami et al.
patent: 4104628 (1978-03-01), Sweany et al.
patent: 4104865 (1978-08-01), Sasaki
patent: 4123671 (1978-10-01), Aihara et al.
patent: 4124806 (1978-11-01), Rusznyak
patent: 4145872 (1979-03-01), Portmann
Adams Bruce L.
Burns Robert E.
Kabushiki Kaisha Daini Seikosha
Lobato Emmanuel J.
Miska Vit W.
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