Back to results
US 4,392,748 AGranted
Quartz crystal watch
AssigneeKabushiki Kaisha Suwa Seikosha
InventorMasahito Yoshino
Life of this patent
Estimating the term…
Abstract
A quartz crystal analog watch has a circuit block and mechanical elements on one side of a frame plate and the battery power source resting on an insulating plate on the other side of the frame plate. The diameter of the movement approximates the battery diameter.
Claims28
A quartz crystal watch comprising:
- a movement, said movement including:
- vibrator means providing a standard frequency signal;
- a MOS integrated circuit having electronic circuit means for operating on said standard frequency signal and outputting signals for driving motor means;
- motor means for converting said output signals from said electronic circuit means into mechanical motion, said motor means including a permanent magnet rotor, plate-type stator, and driving coil, said rotor, stator and coil not overlapping one another;
- a gear train cooperating with said motor means to drive a display;
- and
- a frame plate supporting said rotor and said gear train, said MOS integrated circuit and said driving coil being positioned in approximately opposite positions on said frameplate, and said gear train being positioned between said MOS integrated circuit and
- said driving coil;
- a battery positioned on one side of said frame plate, the area of said movement being substantially equal to the area of said battery;
- an insulating plate positioned between said battery and said one side of said frame plate, said vibrator means, circuit means, motor means and gear train being positioned on the other side of said frame plate, said battery being positioned to overlap said driving coil, said MOS integrated circuit and said gear train;
- and
- a battery lead plate for connecting said battery with said MOS integrated circuit, at least a part of said lead plate being positioned in contacting opposition with an outer peripery portion of said battery, said battery lead plate supporting said battery relative to said movement and said frame plate.
9 more elements
A quartz crystal watch as claimed in claim 10, wherein said circuit means and vibrator means are in said first circular portion adjacent said stem, and said coil, stator, and rotor are in the second circular portion opposite from said stem.
Dependencies are inferred from the claim text.