Electronic watch with a device for controlling and driving the d

Details Electronic watch with a device for controlling and driving the d Electronic watch with a device for controlling and driving the d

1979-06-28

1982-03-16

Weldon, Ulysses

Horology: time measuring systems or devices

With calendar indicator

368 34, 368 35, 368 37, 368 38, G04B 1924

Patent

active

043204767

ABSTRACT:
An electronic watch comprising a device for controlling and driving the day of the month disc, wherein the wheel train supplies the energy necessary for moving the day of the month disc, but does not determine the instant of the jump, which may be initiated at any moment by an electrical signal, independently of the position of the wheel train.
The device comprises a mechanism driven by the wheel train and arranged so as to disengage when the moving bodies of the wheel train, controlling the display, turn continuously in clockwise direction and to re-engage when said moving bodies turn in anti-clockwise direction. A control circuit determines, in a portion of the driving cycle in an anti-clockwise direction of rotation with a rapid rate, the jump of the display disc of the day of the month mechanism.

REFERENCES:
patent: 3827234 (1974-08-01), Imanishi
patent: 4060976 (1977-12-01), Jakob
patent: 4175372 (1979-11-01), Tamara et al.
Brice Ward, Digital Electronics, Tab Books, Blue Ridge, Summit, Pa. 17214, 1972, p. 17.

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