Patents by Inventor John C. Bartholomew

John C. Bartholomew 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).

  • Video signal termination detection circuit
    Patent number: 9473710
    Abstract: A video signal termination detection system includes an input configured to connect to a video driver that produces a video signal, an output configured to connect to a video receiver that operates with a signal type, a detection circuit connected between the input and the output and configured to detect the signal type of the video receiver and to output a detection signal, and a conversion circuit configured to receive the video signal from the video driver and to convert the video signal to the signal type if the video signal is different than the signal type.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: October 18, 2016
    Assignee: Rosemount Aerospace Inc.
    Inventors: John C. Bartholomew, Nathan D. Evans, James W. Swenson
  • Power supply compensation for an actuator
    Patent number: 9106171
    Abstract: A mechanism for compensating power to a motor or actuator. Compensation may counter the effects of changing voltage levels of power to the motor and varying temperatures at the motor. An output of a wave generator may be input to a comparator along with a level of voltage representing the temperatures and voltage levels. An output may be a power signal for driving the motor at a constant speed and/or torque which can increase a maintenance-free lifetime of the motor and actuator.
    Type: Grant
    Filed: May 17, 2013
    Date of Patent: August 11, 2015
    Assignee: Honeywell International Inc.
    Inventors: John C. Bartholomew, Mark D. Bokusky, Steffen J. Moeller
  • VIDEO SIGNAL TERMINATION DETECTION CIRCUIT
    Publication number: 20150222822
    Abstract: A video signal termination detection system includes an input configured to connect to a video driver that produces a video signal, an output configured to connect to a video receiver that operates with a signal type, a detection circuit connected between the input and the output and configured to detect the signal type of the video receiver and to output a detection signal, and a conversion circuit configured to receive the video signal from the video driver and to convert the video signal to the signal type if the video signal is different than the signal type.
    Type: Application
    Filed: February 4, 2014
    Publication date: August 6, 2015
    Applicant: ROSEMOUNT AEROSPACE INC.
    Inventors: John C. Bartholomew, Nathan D. Evans, James W. Swenson
  • POWER SUPPLY COMPENSATION FOR AN ACTUATOR
    Publication number: 20140340016
    Abstract: A mechanism for compensating power to a motor or actuator. Compensation may counter the effects of changing voltage levels of power to the motor and varying temperatures at the motor. An output of a wave generator may be input to a comparator along with a level of voltage representing the temperatures and voltage levels. An output may be a power signal for driving the motor at a constant speed and/or torque which can increase a maintenance-free lifetime of the motor and actuator.
    Type: Application
    Filed: May 17, 2013
    Publication date: November 20, 2014
    Inventors: John C. Bartholomew, Mark D. Bokusky, Steffen J. Moeller