U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Digital alarm watch

Patent 4115993 Issued on September 26, 1978. Estimated Expiration Date: Icon_subject October 7, 1996. 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.

Patent References

3533226

3813533

3834153

Inventor

Assignee

Application

No. 05/730430 filed on 10/07/1976

US Classes:

368/72, Alarm type368/224, With manual activation368/67, With auxiliary illumination for display968/957, Provided with means for displaying at will a time indication or a date or a part thereof [G04G 9/08D]968/969At preselected times, e.g., alarm clocks, etc. [G04G 13/02]

Examiners

Primary: Jackmon, Edith S.

Attorney, Agent or Firm

International Classes

G04G 9/00 (20060101)
G04G 13/00 (20060101)
G04G 13/02 (20060101)
G04G 9/08 (20060101)

Foreign Application Priority Data

1975-10-13 JP

Abstract

A digital alarm timepiece including a time standard for generating a time standard signal, a divider for dividing the time standard signal and developing a repetitive output signal, and a counter receptive of the divider output signal for counting the same and for developing a count representative of time and date. A date-second switching circuit cooperates with the counter for switching between a count representative of seconds and a count representative of date. A plurality of memory circuits define respective channels and each stores a time signal representative of a time. A display responds to the contents of the counter and to the time signals for displaying a time corresponding thereto. A channel selecting switch applies a selected one of the time signals stored in one of the memories or the counts switched by the date-second switching circuit for displaying a selected time or date or seconds. A coincidence circuit compares the count developed by the counter with the time signals stored in the memories and develops an output signal when the count and one of the time signals coincide. An alarm responds to the coincidence circuit output signal for developing an alarm signal. The channel selecting circuit, the date-second switching circuit, and the alarm are controlled by a plurality of manually operable switches.

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