Abstract: A method and apparatus for testing microwave ovens to determine if exterior radiation levels exceed permissible maxima. The leakage levels are sensed by a sensor moved along a preselected path accurately spaced from the oven cabinet. The probe is moved automatically at high speed along the path until a leakage level above a preselected value is sensed. A control associated with the apparatus automatically causes the sensor to move subsequently at a reduced speed to determine the maximum leakage at that position. The control causes a repeated traverse of the questioned position at the slow speed to provide an accurate maximum leakage determination. The control includes reference information indicating acceptable levels of leakage along the path of movement of the sensor which are continuously compared with actual sensed values.

Abstract: An ice dispenser control wherein a plurality of solenoids are selectively operated by switches engaged by cups of different sizes placed in a dispensing space of the ice dispenser. The solenoids cause a delivery passage of the ice maker to be closed at a selected level thereof by a divider while concurrently a closure normally closing the delivery end of the delivery passage is removed therefrom so as to permit ice bodies in the passage between the delivery end and the actuated divider to be dispensed to the cup in the dispensing space. The control causes an agitator in the ice storage bin to be operated for a preselected period of time each time ice is delivered from the delivery passage. Additionally, the control is arranged to cause agitation of the ice in the ice storage bin whenever no dispensing of ice is effected for a preselected long period of time, thereby to prevent conglomeration of the ice bodies in the storage bin.

Abstract: A control for use in a slab-type ice maker wherein slabs of ice are formed on refrigerated plates by the circulation of water thereover. The control includes sensors for detecting the thickness of the slabs on the plates and causing termination of the ice forming cycle and initiation of an ice transfer or harvest cycle wherein the plates are heated, permitting the slabs of ice to pass downwardly therefrom onto cutting grids for cutting of the ice slabs into a plurality of smaller ice bodies. The sensors utilize a small current detected when the ice slab reaches a preselected thickness as a signal for effecting the automatic operation. Further sensors are associated with the cutting grids for detecting the presence of ice slabs thereon. The control functions to prevent termination of the ice making cycle until such time as at least one of the cutting grids has no ice thereon.