Alarm electronic timepiece

Patent 4234944 Issued on November 18, 1980. Estimated Expiration Date:

December 4, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3727395

Electronic alarm watch Patent #: 3946549
Issued on: 03/30/1976
Inventor: Cake

Inventors

Assignee

Kabushiki Kaisha Daini Seikosha

Application

No. 05/966271 filed on 12/04/1978

US Classes:

368/72, Alarm type368/155, ELECTRICAL TIME BASE368/223, DISPLAYS OR DISPLAY DEVICE DETAILS368/245, With variable loudness or tone368/251, With electronic memory storage968/971Adjusting the duration and/or amplitude of signals [G04G 13/02A2]

Examiners

Primary: Weldon, Ulysses

Attorney, Agent or Firm

International Classes

G04G 13/00 (20060101)
G04G 13/02 (20060101)

Foreign Application Priority Data

1977-12-08 JP

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.