Horology: time measuring systems or devices – Chronological – With simultaneous time indicating means
Patent
1978-12-04
1980-11-18
Weldon, Ulysses
Horology: time measuring systems or devices
Chronological
With simultaneous time indicating means
368155, 368223, 368251, 368245, G04C 2100
Patent
active
042349443
ABSTRACT:
An alarm electronic timepiece comprises an oscillating circuit for generating a high frequency reference signal which is frequency divided by a frequency dividing circuit into a lower frequency time signal. A display device displays information indicative of the present time in accordance with the time signal. An alarm counter is preset with the desired alarm time and a coincidence detecting circuit detects coincidence between the present time and the preset alarm time and accordingly provides an output signal which is fed to a buzzer for generating an alarm sound. Circuitry is provided for sounding the alarm in advance of the preset alarm time and at a low sound volume which gradually increases with the passage of time, such circuitry including a subtraction circuit connected between the alarm counter and the coincidence detecting circuit, a ring counter connected to receive the output signal from the coincidence detecting circuit, and a modulation circuit connected to the ring counter for modulating the signal applied to the buzzer.
REFERENCES:
patent: 3727395 (1973-04-01), Baylor
patent: 3946549 (1976-03-01), Cake
Kaneko Noboru
Komaki Shojiro
Adams Bruce L.
Burns Robert E.
Kabushiki Kaisha Daini Seikosha
Lobato Emmanuel J.
Weldon Ulysses
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