Timepiece comprising a generator driven by the main spring of a

Details Timepiece comprising a generator driven by the main spring of a Timepiece comprising a generator driven by the main spring of a

1999-01-22

2000-02-08

Miska, Vit

Horology: time measuring systems or devices

Power supply details

Electrical

368208, G04B 100, G04B 502, G04C 300

Patent

active

060234466

ABSTRACT:
A timepiece comprising a generator (1) for generating a supply voltage of a first predetermined value U.sub.1, a barrel with a spring (5, 6), a winding mechanism (5') and a set of hands (7 to 9). The electronic circuit (11, 12) of the timepiece requires a minimum limited supply voltage having a second predetermined value U.sub.2. This circuit comprises a timebase (12) and a regulating circuit (11) for regulating the rotational speed of the generator. According to the invention, a voltage regulator (25) is connected between the generator and said electronic circuit for adjusting its output voltage to said limited second value U.sub.2. The ratio between the absolute value U.sub.1 of the predetermined first value U.sub.1 and the second predetermined value satisfies the relationship U.sub.1 =k.multidot.U.sub.2, k being a factor corresponding at least to the maximum expected variation rate of the absolute value U.sub.1 when the timepiece is worn.

REFERENCES:
patent: 3715880 (1973-02-01), Simons
patent: 4799003 (1989-01-01), Tu et al.
patent: 5668414 (1997-09-01), Takahashi et al.
patent: 5923619 (1999-07-01), Knapen

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