Touch sensitive device for a timepiece

Details Touch sensitive device for a timepiece Touch sensitive device for a timepiece

1978-11-21

1980-05-20

Jackmon, Edith S.

Horology: time measuring systems or devices

Regulating means

For setting

368321, 200DIG1, 340365C, G04B 3700, G08C 100

Patent

active

042032806

ABSTRACT:
A touch sensitive device for controlling a function of a timepiece is formed with a condenser having a capacity independent of the area of the device touched. A conductive stem is fixed in a timepiece case and is electrically insulated from the case by a mounting member. A head is fixed on an end of the stem adjacent the outside of the timepiece to form one of the condenser electrodes. A thin layer of insulating material covers the outside of the head and forms the condenser dielectric. A layer of conductive material is fixed on a side of the dielectric material opposite the head and forms the second condenser electrode. When the second electrode is energized by the touch of the user, the entire second electrode is energized independent of the area touched by the user, giving the condenser a capacity independent of the area of the second electrode touched.

REFERENCES:
patent: 3871170 (1975-03-01), Bergey
patent: 3911664 (1975-10-01), Haber
patent: 3946182 (1976-03-01), Holder
patent: 4090353 (1978-05-01), Maeda et al.

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