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Detergent supply control for automatic dishwasher

  • US 4,211,517 A
  • Filed: 11/27/1978
  • Issued: 07/08/1980
  • Est. Priority Date: 11/27/1978
  • Status: Expired due to Term
First Claim
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1. In combination:

  • a motor-driven supply pump for supplying a substance to a liquid solution which changes the conductivity of said solution;

    and control means for operating said supply pump and comprising a timer and a conductivity sensor,said timer being operable to enable said conductivity sensor to effect operation of said timer and said supply pump in response to a low conductivity level,said timer being further operable to prevent said conductivity sensor from effecting operation of said timer and said supply pump in response to a low conductivity level after said timer has operated for a predetermined interval of time.

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