Device for preventing unbalance in washing machines during spindrying
AssigneeU.S. Philips Corporation
InventorYves Albert Daniel Thibaut
Life of this patent
Estimating the term…
Abstract
A device for avoiding unbalance during acceleration to spindrying. A water level sensor has an additional contact through which a control voltage which is derived from a motor speed regulator is fed, and interrupts the motor supply if the drum speed decreases below a predetermined value. Spindrying cannot commence until after the tub is filled and an operating sequence at washing speed has taken place.
Claims3
A device for preventing excessive imbalance in a clothes washing machine, comprising a drum driving motor, means for supplying voltage to the motor, regulating means sensitive to rotational speed of said motor for providing an output electrical control signal in response to said speed being below a predetermined speed, means for controlling voltage supplied by said supply means in response to an electrical control signal input, a water level switch contact for sensing a tub empty condition, an operating function controller contact for selecting a spin drying function, and means connecting said water level sensing contact and said operating function contact between the regulating means output and said voltage controlling means input such that voltage supplied to said motor will be controlled in response to said speed sensitive signal only when said spin drying function is selected and a tub empty condition is sensed.
Dependencies are inferred from the claim text.