Quartz crystal wrist watch
AssigneeKabushiki Kaisha Suwa Seikosha
InventorSatoshi Yamazaki
Life of this patent
Estimating the term…
Abstract
A quartz crystal wrist watch wherein means are provided for removably mounting along the periphery of the watch the battery power source, the oscillator and associated circuitry and an electro-mechanical converter. The electro-mechanical converter is provided with a rotor coupled to the gear train of the watch positioned in the central portion thereof. The oscillator and associated circuitry are removably mounted in said watch by means of a resin case adapted to carry said oscillator and associated circuitry.
Claims6
In a quartz crystal wrist watch, the improvement which comprises a quartz crystal time standard oscillator means for providing a high frequency time standard signal, a dividing circuit for providing low frequency time [signals] signal in response to said time standard [signals] signal from said time standard oscillator means, a stepping motor being driven in response to the low frequency timing signals applied by said dividing circuit, said stepping motor including a driving coil, a yoke formed of high permeability materials disposed through said driving coil and formed with spaced ends defining poles lying in the same plane as said driving coil and a rotor disposed in the gap between said poles and lying in the same plane as said driving coil;
- battery power means coupled to said time standard oscillator means, dividing circuit and driving coil for energizing same;
- a support plate;
- said driving coil, battery power means and quartz crystal time standard oscillator means being supported on peripheral regions of said plate out of overlapping relation with each other and with said rotor;
- a bridge member;
- and a gear train mechanically coupled to said rotor to be driven thereby, said rotor and at least the portion of said gear train coupled thereto being supported by said bridge member and said plate at a central region of said plate.
In a quartz crystal wrist watch, the improvement which comprises a quartz crystal time standard oscillator means for providing a high frequency time standard signal;
- battery power means coupled to said time standard oscillator means;
- a dividing circuit for providing a low frequency time signal in response to said time standard signal from said time standard oscillator means;
- a stepping motor including a driving coil coupled to receive as an input thereto said low frequency time signal, a stator magnetically coupled to said driving coil and a rotor formed of permanently magnetic material and magnetically coupled to said stator, said rotor including a mechanical output transmitting member;
- mechanical gearing coupled to said mechanical output transmitting member for driving by said rotor;
- a bridge member;
- and a support plate, said rotor, driving coil and stator being arranged in a plane substantially parallel to the plane of said support plate within the area defined by said support plate, said mechanical gearing, mechanical output transmitting member and rotor being supported by said support plate and bridge member at a central region of said support plate, said battery power means and time standard oscillator means being located out of overlapping relation with each other and with said driving coil, said driving coil and battery power means
- being supported on peripheral regions of said plate.
Dependencies are inferred from the claim text.