Annunciator for use with electronic digital clock

Details Annunciator for use with electronic digital clock Annunciator for use with electronic digital clock

1976-02-23

1977-10-25

Curtis, Marshall M.

Communications: electrical

Audible indication

Ultrasonic pest control

58 13, 58 23R, 58 38R, 340407, G04C 2104

Patent

active

040558436

ABSTRACT:
The present invention provides a system whereby electronic digital clocks may announce the exact time every ten minutes. The hour is announced by a sequence of four tones. Each tone in the sequence is high if the corresponding bit of a binary numbering system representation of the hour digit is high. The tone is low otherwise. The tens of minutes digit is announced in similar manner, except that only three tones are required in the sequence. The system may be used to announce numbers emanating from computers or other electronic digital devices.

REFERENCES:
patent: 3284796 (1966-11-01), Borsattino et al.
patent: 3759029 (1973-09-01), Komaki
patent: 3931621 (1976-01-01), Rose
patent: 3938317 (1976-02-01), Spano

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