Electronic clock having synchronized analog and digital displays

Details Electronic clock having synchronized analog and digital displays Electronic clock having synchronized analog and digital displays

1979-01-11

1981-03-03

Miska, Vit W.

Horology: time measuring systems or devices

With calendar indicator

Electro-optical

368 34, 368228, G04B 1924, G04B 1904

Patent

active

042544904

ABSTRACT:
A watch includes a quartz-controlled electronic drive circuit for the control of the clockwork mechanism of a pointer-driving system for analog display of the time of day, and a digital read-out unit and control circuit for the display of additional data such as month, day of the month, day of the week, and the like. A synchronizing unit is located between the analog and digital systems to provide a synchronous link between the time of the day and the digitally displayed data. This synchronizing unit is coupled with the pointer-driving clockwork mechanism and generates a synchronizing pulse which is derived from the clockwork, preferably at a rate of one pulse per 24 hours. The synchronizing pulse is fed into the display control circuit to synchronously advance the digital read-out of the month, day of the month and day of the week, for example.

REFERENCES:
patent: 3815351 (1974-06-01), Vevelle
patent: 3945191 (1976-03-01), Van Berkum
patent: 3948036 (1976-04-01), Morokawa
patent: 3962861 (1976-06-01), Protta et al.
patent: 4077032 (1978-02-01), Volkman

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