Electronic timepiece
AssigneeEbauches S.A.
InventorJean Schaad
Life of this patent
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Abstract
An electronic timepiece has a variable capacitor for adjustment of the rate of the timepiece by varying the oscillation frequency of an oscillator of the timepiece. One of the electrodes of the variable capacitor is constituted by an area of one of the conductive tracks of a printed circuit of the timepiece. The other electrode of this capacitor is constituted by a layer of a conductive material carried by an insulating pellet secured to the end of a metal arm pivotally mounted on the printed circuit substrate and which is electrically connected to the earth or "ground" of the timepiece circuit. The capacitance of the capacitor formed in this manner varies with the position of the pellet with respect to said area providing said one electrode.
Claims3
In an electronic timepiece having an insulating substrate carrying a plurality of conductive tracks, an adjustable capacitor comprising:
- a first electrode of said capacitor formed by a first conductive area on said substrate;
- an arm;
- an insulating plate rigidly secured to said arm and having a first and a second substantially flat face;
- a second electrode of said capacitor formed by a second conductive area on the first face of said plate;
- and
- means for pivotally mounting said arm for movement between a first end position where said second conductive area is substantially parallel to, and substantially completely overlaps said first conductive area, and a second end position where there is substantially no overlapping between said first and second conductive areas, whereby the capacitance of said capacitor depends on the position of said conductive area between said first and second end positions.
Dependencies are inferred from the claim text.