the numbers being the consecutive numerals 1 9 the nine leads are brought from the motor over to a terminal block located in the control box 18 39 holding coil 32 is actuated in response to the program timer pt being closed and after the time delay td has assumed the closed position energization of the holding coil closes the three contacts 34 located in each leg of the three phase power overloads 36 are series connected with the holding coil in the usual manner the holding coil is connected to terminal 34 a 34 for automatic operation in fig3 the details of the circuitry 18 39 is more specifically disclosed as seen in fig3 supply leg 38 provides current to the normally closed contacts of a first overload sensor and switching device 40 sensor 40 measures current flow through the motor for a plurality of strokes and actuates the two switch contacts connected thereto in response to the power consumption of the motor exceeding a predetermined magnitude during the time interval required for said plurality of strokes one example of sensor device 40 is a bimetallic overload relay available from westinghouse t m identified as thermal overload 3 pole type aa catalog no aa 13pb page 91 cat 25 000 this unit is a part of assembly no a200 micac as shown in the before mentioned catalog this commercially available sensor and switching device has heater elements sized appropriately for the motor 12 as seen in fig7 the response rate of the sensor and switching means 40 varies from.