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Automatic liquid level control

  • US 4,303,406 A
  • Filed: 03/14/1980
  • Issued: 12/01/1981
  • Est. Priority Date: 03/14/1980
  • Status: Expired due to Term
First Claim
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1. An automatic liquid level control system for a laundry apparatus having a tub for containing liquid and a perforate basket within said tub for containing fabrics to be treated, the combination comprising:

  • inlet means for supplying liquid to said tub and operable for spraying liquid into said apparatus for absorption by said fabrics and flow through said fabrics for accumulation in said tub;

    means for measuring the rate of change of liquid level in said tub in the presence of fabrics as a gauge of the total liquid required to treat the specific fabric load in said basket; and

    programmable control means including logic circuit means responsive to said measuring means for determining the additional liquid required to provide said total liquid and for controlling said inlet means to provide an additional timed fill to achieve said total liquid.

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