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DIGITAL ELECTRONIC CONTROL CIRCUIT FOR CYCLICALLY OPERABLE APPLIANCES AND THE LIKE

  • US 3,774,056 A
  • Filed: 04/29/1971
  • Issued: 11/20/1973
  • Est. Priority Date: 04/29/1971
  • Status: Expired due to Term
First Claim
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1. An electronic digital control system for automatic appliances and the like of the type having a plurality of on-off machine functions to be activated and deactivated in accordance with a control strategy comprising one or more cycles made up of a plurality of events, said control system comprising a source of continuous, equally spaced electrical pulses and a control logic, said control logic comprising a master counter and a strategy logic, said master counter having a plurality of stages, said stages having outputs, said strategy logic comprising a decoding logic to select and decode those states of the master counter relevant to said control strategy and a function control logic to interpret said selected states of said master counter and to control said machine functions in accordance with said control strategy, said decoding logic and said function control logic both having inputs and outputs, said pulse source being connected to said master counter, said inputs of said decoding logic being connected to some at least of said stage outputs, some at least of said outputs of said decoding logic being connected to some at least of said inputs of said function control logic, some at least of said outputs of said function control logic being connected to said machine functions, whereby said master counter is caused to change its state by pulses from said pulse source and said machine functions are activated and deactivated by said function control logic in response to said states of said master counter as selected and decoded by said decoding logic in accordance with said control strategy.

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