Electric motor for pedestal type sump pumps

Claim 1

IN AN ELECTRIC SUMP PUMP MOTOR OF THE TYPE HAVING A HOUSING COMPRISING TOP AND BOTTOM BRACKETS WITH BEARINGS IN WHICH THE MOTOR SHAFT IS JOURNALLED, A SUBSTANTIALLY CYLINDRICAL STATOR FRAME CONFINED AXIALLY BETWEEN THE BRACKETS, AND AN ADAPTOR ON THE BOTTOM BRACKET FOR MOUNTING THE MOTOR ON THE UPPER END OF A TUBULAR PEDESTAL WITH THE MOTOR SHAFT IN DRIVING RELATION TO A PUMP SHAFT INSIDE THE PEDESTAL: (A) MEANS ON THE TOP BRACKET DEFINING A SWITCH COMPARTMENT WHICH EXTENDS FROM ONE SIDE OF THE HOUSING, AND A BOTTOM PORTION OF WHICH COMPARTMENT OPENS DOWNWARDLY TO THE SPACE INSIDE THE ADJACENT END PORTION OF THE STATOR FRAME; (B) A PRESSURE SENSITIVE SWITCH UNIT MOUNTED IN SAID COMPARTMENT, FOR GOVERNING OPERATION OF THE MOTOR, SAID UNIT HAVING A PRESSURE PORT WHICH OPENS DOWNWARDLY TOWARD THE BOTTOM OF THE COMPARTMENT AT A LOCATION INWARDLY ADJACENT TO THE STATOR FRAME; (C) THE BOTTOM BRACKET HAVING A HOLE THERETHROUGH AT A LOCATION NEAR TO BUT INWARDLY OF THE STATOR FRAME AND BENEATH SAID PRESSURE PORT; (D) AN ELONGATED TUBE EXTENDING UPWARDLY THROUGH SAID HOLE AND ALONG THE INNER SURFACE OF THE STATOR FRAME, SAID TUBE HAVING ITS UPPER END CONNECTED WITH THE PRESSURE PORT OF THE PRESSURE SENSITIVE SWITCH UNIT; (E) AND AN INVERTED CUP MEMBER ON THE LOWER END OF THE TUBE HAVING ITS INTERIOR COMMUNICATED WITH THE PRESSURE SWITCH UNIT THROUGH SAID TUBE, SO AS TO EFFECT ACTUATION OF THE SWITCH UNIT IN ACCORDANCE WITH CHANGES IN THE PRESSURE OF AIR TRAPPED IN THE CUP MEMBER WHEN THE LATTER IS IMMERSED IN LIQUID CONTAINED IN A SUMP.