Variable speed electrical motor without centrifugal switch

Abstract

A variable speed electrical AC induction motor has windings and a rotor disposed within a motor housing. A switch for varying the speed of the rotor is disposed at a location external of the motor housing. The variable speed electrical AC induction motor is ideal for use in a water recreational combination, such as a spa, hot tub or recirculating bath tub. Because the AC induction motor has a switch which is external to the motor housing, repair or replacement of the switch is conveniently and easily accomplished without having to take apart the electrical motor.

What is claimed is:  
     
         1 . An electrical motor combination comprising: 
 (a) a variable speed electrical AC induction motor, having a motor housing; and    (b) a switch for varying the speed of the motor, wherein the switch is disposed external of the motor housing.    
     
     
         2 . The electrical motor combination of  claim 1  wherein the switch is disposed within a separate switch box.  
     
     
         3 . The electrical motor combination of  claim 1  wherein the combination is disposed within a water recreational combination, the water recreational combination comprising: 
 (a) a water basin capable of retaining a human being partially submerged below a quantity of water;  
 (b) a water pump having a suction side and a discharged side; and  
 (c) water circulation conduits connecting the water basin to the suction side of the pump and connecting the discharge side of the pump to the water basin; 
 wherein the electrical motor drives the water pump.  
 
 
     
     
         4 . A water recreational combination comprising: 
 (a) a water basin capable of retaining a human being partially submerged below a quantity of water;    (b) a water pump having a suction side and a discharged side;    (c) water circulation conduits connecting the water basin to the suction side of the pump and connecting the discharge side of the pump to the water basin;    (d) a variable speed electrical AC induction motor for driving the water pump; and    (e) a switch for varying the speed of the rotor, wherein the switch is disposed external of the motor housing in a separate switch box.    
     
     
         5 . The water recreational combination of  claim 4  wherein the water basin, the pump, the electrical motor and the switch box are enclosed within a spa surround.