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Automatically controlled washing machine

  • US 5,647,232 A
  • Filed: 04/08/1996
  • Issued: 07/15/1997
  • Est. Priority Date: 12/10/1993
  • Status: Expired due to Term
First Claim
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1. In an automatically controlled washing machine including:

  • a laundry drum;

    a drive motor for driving the laundry drum with a plurality of different speeds for washing, rinsing and spinning;

    an rpm control circuit for adjusting an rpm of the drive motor; and

    means for determining the rpm of the drive motor in accordance with set-point and actual rpm values;

    the improvement comprising;

    a control circuit receiving a signal during a spin cycle, the signal being a measure for an undesired braking of the drum and being determined by a mutual ratio of the following operating parameters of the drive motor;

    a) the set-point rpm,b) the actual rpm, andc) a load-dependent electrical variable;

    and said control circuit controlling a spinning operation of the washing machine in dependence on the signal.

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