Electronic timepiece supplied by a generator driven by a mechani

Details Electronic timepiece supplied by a generator driven by a mechani Electronic timepiece supplied by a generator driven by a mechani

1998-04-22

2000-09-05

Roskoski, Bernard

Horology: time measuring systems or devices

Mechanical time base

Mainspring

368155, 368203, 368157, H02P 904

Patent

active

061132594

ABSTRACT:
The timepiece (1) includes a mainspring (2) driving the rotor (3a) of an electromechanical converter (3) and time display hands (6). A circuit (7) for enslaving the real angular position of the rotor (3a) to its desired angular position is supplied with electrical energy by the converter (3). In order to increase the autonomy of the timepiece (1), the enslaving circuit (7) includes means (28) which store a portion of the electrical energy generated by the converter (3) and means (21, 23 to 27) which use this stored electrical energy to apply driving pulses (IM) to the converter (3) when the rotor (3a) has a greater retardation than a determined retardation, with respect to its desired angular position.

REFERENCES:
patent: 4799003 (1989-01-01), Tu et al.
patent: 5517469 (1996-05-01), Wiget

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