Patents by Inventor James D. Tasma

James D. Tasma 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).

  • Non-contacting potentiometer
    Patent number: 5049827
    Abstract: A non-contacting potentiometer includes a resistor and a movable probe which capacitively couples AC signals applied to the resistor to an output terminal. A closed loop control circuit is coupled to the resistor and the probe to compensate for variations in gap spacing between the probe and resistor.
    Type: Grant
    Filed: January 12, 1990
    Date of Patent: September 17, 1991
    Assignee: Jet Electronics & Technology Inc.
    Inventor: James D. Tasma
  • Control circuit for alternately actuating a pair of loads
    Patent number: 4326133
    Abstract: A control circuit for alternately actuating a pair of loads includes a voltage doubling circuit having a capacitor common to a pair of charge storage devices and switch means which are alternately actuated to discharge the charge storage devices through a pair of loads. Coupled to the circuit is a holding current power supply for maintaining the loads in an actuated position once the charge storage devices are discharged. The circuit thus provides an initially high current pulse for rapidly actuating inductive loads such as solenoids.
    Type: Grant
    Filed: September 6, 1979
    Date of Patent: April 20, 1982
    Assignee: Rospatch Corporation
    Inventor: James D. Tasma