Patents by Inventor Nils-Ole Harvest

Nils-Ole Harvest 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).

  • Rotary speed ratio control arrangement
    Patent number: 4196376
    Abstract: The invention relates to a control circuit for controlling the speed ratio of a lead motor and a follower motor. The outputs of pulse generators driven by the motors are compared by being fed the positive and negative inputs of a bidirectional counter which outputs a positive or negative value indicative of the sensed speed ratio. A digital/analog converter driven by the counter effectively controls the speed of the follower motor pursuant to the sensed speed ratio.
    Type: Grant
    Filed: May 10, 1978
    Date of Patent: April 1, 1980
    Assignee: Danfoss A/S
    Inventors: Nils-Ole Harvest, Niels Hasberg, Kaj Nielsen