Interface device for the entry of data into an instrument of small volume responsive to body movement
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United States of America Patent
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Dec 21, 1982
Grant Date -
N/A
app pub date -
Dec 16, 1980
filing date -
Dec 20, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention concerns an interface device for the entry of data into an trument of small volume such as a timepiece and comprises a static touch responsive sensor formed by a plurality of juxtaposed electrodes. An electronic logic circuit on the one hand receives signals emitted by the sensor representing the position of a finger on the sensor and on the other hand provides output clock pulses to a first and a second counter. Switching means in the electronic logic circuit enable the switching of the clock pulses to the first counter if the finger is moved over the sensor at a speed v.sub.1 less than a threshold speed v.sub.2 or to the second counter if the finger is moved over the sensor at a speed v.sub.3 greater than the threshold speed v.sub.2. The invention may be employed in small timepieces for time setting for example.
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