Whirlpool Corporation

Clifford L DeSchaaf

Philip P Johnson

Ray W Spiegel

A control circuit for a drier wherein a buzzer is provided for signalling termination of the normal drying cycle or operation of the drier in an anti-wrinkle cycle. When utilized to signal the end of a normal cycle, the buzzer provides a short time duration signal and when utilized to indicate the operation of the drier in the anti-wrinkle cycle, the buzzer provides a longer duration signal at periodic intervals during the cycle. Control of the buzzer is by a single cycle switch connected in cooperation with a timed switch for controlling operation of the drier drive motor, and a centrifugal switch also provided for controlling operation of the drier drive motor. The cycle switch may be a double throw switch and may have an associated pulser mechanism for effecting the desired intermittent operation of the buzzer for indicating the anti-wrinkle cycle.

Control circuit for drier

A receptacle such as a dishwasher tub having an improved control for effecting filling of the tub to a preselected full level and protecting the apparatus against undesirable overfill in the event the normal flow control malfunctions. The flow control includes a control valve having two valve elements for cooperatively preventing such undesirable overfill. One of the valve elements may be controlled by an electrically operated solenoid, and the other valve element may be controlled by mechanical control structure. In the illustrated embodiment, the electrically controlled valve element is controlled by a timer, and the mechanically controlled valve element is controlled by a float. A heater is provided for heating liquid in the tub and an improved control is provided for controlling the heater so as to prevent energization thereof whenever the sensed liquid volume in the tub is below a preselected minimum. Illustratively, the volume is sensed by a float sensing the level of liquid in the tub and connected to a switch of the control for selectively energizing the heater.

Heater safety control

An improved latch structure for releasably locking a door to a cabinet including switch structure for permitting operation of electrical apparatus associated therewith to be operated only when the door is in the latched closed position. The switch is hidden within the door behind the latch bolt so as to be operated substantially only by the strike which has a preselected configuration to effect the latching and switch operating operations. The bolt may be operated manually to release the door from the latched condition, and in the illustrated embodiment, an improved pivotally mounted operator is provided for effecting the desired unlatching movement of the bolt.

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Stevensville, MI, United States of America

Clifford L DeSchaaf