Patents by Inventor Barry K. James

Barry K. James 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).

  • Electrostatic precipitators
    Patent number: 4558404
    Abstract: A circuit for applying unidirectional pulses to a precipitator, in addition to a base d.c. level supplied by a transformer/rectifier set, includes a rectifier, an inverter and a transformer/rectifier set connected to charge a storage capacitor. Discharge of the capacitor into the precipitator is controlled by a chain of unidirectionally conducting devices (thyristors as shown) which are simultaneously triggered at the desired voltage at the capacitor. In other embodiments breakover diodes are used instead of the thyristors.
    Type: Grant
    Filed: April 20, 1983
    Date of Patent: December 10, 1985
    Assignee: Dresser Industries, Inc.
    Inventor: Barry K. James
  • Analogue automatic voltage controller
    Patent number: 4160202
    Abstract: A control circuit for an electrostatic precipitator, in which an analogue voltage indicative of the desired precipitator electrode potential is stored and periodically increased in the absence of any condition, notably a falling electrode potential, that the desired voltage is excessive in which case the stored potential is reduced.
    Type: Grant
    Filed: November 21, 1977
    Date of Patent: July 3, 1979
    Assignee: Dresser Industries, Inc.
    Inventors: Barry K. James, David R. Terry