Patents by Inventor John L. Mercer

John L. Mercer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Voltage selector for a three phase electrical motor
    Patent number: 4781610
    Abstract: A reversible connector for applying selectively different power levels to a three phase electrical motor. Lead wires from the motor are brought out to a terminal block having an array of female terminals arranged for mating engagement with arrays of pins on opposite sides of the reversible connector. The pin arrays are setwise interconnected so that engagement with the terminal block produces appropriate connections for the selected power level. Three phase power leads are connected to the connector, and the connector is engaged with the terminal block in that facing direction which is appropriate for the power level being applied to the power leads.
    Type: Grant
    Filed: July 27, 1987
    Date of Patent: November 1, 1988
    Inventor: John L. Mercer