Electronic timepiece

Details Electronic timepiece Electronic timepiece

1977-12-01

1981-11-10

Truhe, J. V.

Horology: time measuring systems or devices

With calendar indicator

Movable ring or disk

368 76, 368220, G04B 1924

Patent

active

043002226

ABSTRACT:
An electronic timepiece equipped with calendar display means adapted to be driven by a drive motor means provided independently of a drive motor means adapted for driving time indicating hands. The drive motor means for driving the calendar display means is driven by a drive system which comprises a calendar memory circuit responsive to a reference signal, i.e., a 00:00 AM signal indicative of midnight, to update the content of the calendar memory circuit, a drive signal setting circuit coupled to said calendar memory circuit and generating a calendar information signal in response to the content of said calendar memory circuit, and a driver circuit responsive to said calendar information signal to generate a drive signal for energizing said drive motor means for driving said calendar display means.

REFERENCES:
patent: 3662534 (1972-05-01), Colomb
patent: 3732687 (1973-05-01), Miyasaka et al.
patent: 3775966 (1973-12-01), Matsuura
patent: 3779000 (1973-12-01), Schmid
patent: 3815351 (1974-06-01), Vovelle
patent: 3945191 (1976-03-01), van Berkum
patent: 3961472 (1976-06-01), Riehl
patent: 4112671 (1978-09-01), Kato et al.
patent: 4175372 (1979-11-01), Tamaru et al.

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