Countdown timer

Details Countdown timer Countdown timer

1983-01-20

1984-05-29

Roskoski, Bernard

Horology: time measuring systems or devices

Chronological

Phonetic

368 89, 368107, 368109, G04B 2108, G04C 2114

Patent

active

044511582

ABSTRACT:
A countdown timer designed for counting down predetermined intervals of time and periodically announcing the progressive elapse of the countdown period thru the use of a voice synthesizer. The time interval between the spoken announcements is decreased as the end of the period approaches. An automatic restart period is incorporated which recycles to a predetermined time to begin the countdown again the number of the restart cycle being counted down is displayed.

REFERENCES:
patent: 3581410 (1969-02-01), Zeigner et al.
patent: 4266096 (1981-05-01), Inoue et al.
patent: 4405241 (1983-09-01), Aihara et al.
patent: 4421416 (1983-12-01), Hashimoto et al.

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