Interface device for the entry of data into an instrument of sma

Details Interface device for the entry of data into an instrument of sma Interface device for the entry of data into an instrument of sma

1980-12-16

1982-12-21

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340365VL, 340706, 340365C, G09G 300

Patent

active

043652433

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.

REFERENCES:
patent: 4005400 (1977-01-01), Engdahl
patent: 4221975 (1980-09-01), Ledniczki et al.
patent: 4242676 (1980-12-01), Piguet et al.
patent: 4264903 (1981-04-01), Bigelow
patent: 4291303 (1981-09-01), Cutler et al.
patent: 4302011 (1981-11-01), Pepper, Jr.

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