Patents by Inventor James G. Michner

James G. Michner 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).

  • Facsimile drive with dynamic brake
    Patent number: 4149193
    Abstract: In a facsimile transceiver, the scanning drum is driven by a DC motor which is coupled to a source of drive pulses having a duty cycle which controls the speed of the DC motor. Dynamic braking pulses are applied to the motor between the drive pulses. The braking current pulses are generated as a result of armature counter EMF and flow through a low impedance path around the DC motor.
    Type: Grant
    Filed: December 23, 1977
    Date of Patent: April 10, 1979
    Inventor: James G. Michner
  • Method and apparatus for facsimile scanning
    Patent number: 4092576
    Abstract: A facsimile transceiver comprises a rotatably mounted drum and an information transducer juxtaposed to the drum for marking on a copy medium carried by the drum or detecting dark-light variations in a document carried by the drum. The drum is driven by a DC motor with the speed of the motor controlled by a phase locked loop in which the phase and frequency of reference pulses are compared with the phase and frequency of pulses having a frequency proportional to the speed of rotation of the drum.
    Type: Grant
    Filed: October 14, 1975
    Date of Patent: May 30, 1978
    Assignee: Exxon Research & Engineering Co.
    Inventor: James G. Michner