Flint & Walling, Inc.

Flint & Walling Industries, Inc.

Paul T Kachuk

An electrical circuit for controlling start windings in induction motors of various sizes or horsepowers providing a broad range of application. The circuit for controlling start winding switching measures the current through both the start and run windings of the motor allowing the use of a single solid state device in the circuit. This combined current develops a voltage across a resistor which is used to gate on the solid state device when the voltage exceeds a threshold level. By using the solid state device in combination with the special resistor, a motor start switch is formed which can be used to start a wide range of dual voltage motors.

Electro-start motor switch

A governor and motor assembly of a fractional horsepower electric motor adapted to control the efficient operation of the motor utilizing simple structural components. The governor is responsive to the centrifugal forces of the rotating rotor shaft of the motor and is attached to the end thereof. The governor includes a carrier plate affixed to the shaft and a pivotable lever mounted within a groove in the carrier plate. A first end of the pivotable lever is connected to the carrier plate by an extension spring which acts to move the lever to its at rest or actuated position. As a predetermined rotational velocity is reached, the lever pivots at the groove to pivot away from the electrical switch aligned axially with the rotor shaft. The electrical switch, in turn, is mounted to a terminal board fixedly mounted to the motor housing to thereby positionally maintain the governor on the motor shaft as well as retain the associated capacitor. In this manner, a minimum of mounting hardware is needed to assemble the governor and control components. The motor housing is provided with indirect venting to prevent fluid splash from damaging the internal components of the motor.

Governor and motor assembly

A corrosion resistant ferrule secured to the end of a full carbon steel rotor shaft in order to reduce wear and corrosion of the sealing elements of the pump assembly, while enhancing the overall strength of the drive shaft. A threaded member is received in the end of the rotor shaft and ferrule in order to secure the pump impeller to the drive shaft. The corrosion resistant ferrule reduces manufacturing costs while allowing integral rotor shaft construction. The ferrule may be manufactured of stainless steel, plastic, or brass.

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Ft. Wayne, IN, United States of America

Paul T Kachuk