Patents by Inventor Norman C. Walker

Norman C. Walker 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).

  • FULL WAVE RECTIFIED ISOLATED CURRENT SENSOR
    Publication number: 20180024169
    Abstract: A small wire is wound several times around a powdered metal toroidal core to sense voltage produce by single polarity current flowing through a larger wire passing through the toroid. An integrator circuit integrates the voltage in the small wire to produce an output voltage as a measure of AC and DC components of the single polarity current, such as a full wave rectified current.
    Type: Application
    Filed: July 20, 2016
    Publication date: January 25, 2018
    Inventor: Norman C. Walker
  • Magnetic encoder for powered window covering
    Patent number: 6870338
    Abstract: A small permanent magnet is affixed to the protruding portion of a rotor of a motor that is coupled to gears in a gear enclosure. The rod of a window covering is coupled to the gears such that when the motor is energized by a user command signal, the window covering moves. At least one pick-up coil is affixed to the receptacle of the gear enclosure, such that when the motor with magnet turns, the pick-up coil senses magnetic pulses that can be used to determine the speed, position, and direction of rotation of the motor.
    Type: Grant
    Filed: June 11, 2003
    Date of Patent: March 22, 2005
    Assignee: Harmonic Design, Inc.
    Inventors: Winston Glenn Walker, Norman C. Walker
  • Magnetic encoder for powered window covering
    Publication number: 20040011477
    Abstract: A small permanent magnet is affixed to the protruding portion of a rotor of a motor that is coupled to gears in a gear enclosure. The rod of a window covering is coupled to the gears such that when the motor is energized by a user command signal, the window covering moves. At least one pick-up coil is affixed to the receptacle of the gear enclosure, such that when the motor with magnet turns, the pick-up coil senses magnetic pulses that can be used to determine the speed, position, and direction of rotation of the motor.
    Type: Application
    Filed: June 11, 2003
    Publication date: January 22, 2004
    Inventors: Winston Glenn Walker, Norman C. Walker
  • System for precise measurement of time intervals
    Patent number: 4982350
    Abstract: An integrated system for precise measurement of time intervals wherein a high resolution and accuracy can be achieved through the implementation of an interpolation function and a self calibration function. The interpolation function scales down a relatively coarse major time base to a finer time base for the portions near the boundaries of the time interval that is being measured. The calibration function is built into the system for facilitating calibration of the interpolation function under actual operating of the system.
    Type: Grant
    Filed: June 10, 1987
    Date of Patent: January 1, 1991
    Assignee: Odetics, Inc.
    Inventors: Nicholas A. Perna, Norman C. Walker