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Touch control arrangement for data entry

  • US 4,495,485 A
  • Filed: 08/31/1983
  • Issued: 01/22/1985
  • Est. Priority Date: 12/12/1980
  • Status: Expired due to Fees
First Claim
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1. A touch control arrangement for an appliance of the type incorporating a plurality of appliance operating components arranged for selective actuation in accordance with use generated input data, said touch control arrangement comprising:

  • touch responsive data entry means arranged for user actuation comprising a plurality of touch keys and a capacitive network including a plurality of capacitive elements operatively coupled to said touch keys;

    oscillating means for generating a control signal at a plurality of discrete predetermined frequencies;

    each of said touch keys being uniquely associated with a different one of said plurality of predetermined frequencies, said capacitive network being coupled in tuning relationship with said oscillating means such that the frequency of said control signal is determined by the selective touching of said touch keys by the user; and

    a microprocessor responsive to said control signal operative to control appliance operation in a manner determined by the frequency of said control signal.

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