Patents by Inventor Peter Palmer

Peter Palmer 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).

  • On-load tap changer
    Patent number: 4081741
    Abstract: On-load tap changer apparatus of the type having two connection branches, each of which is connected between a common connection point and a separate movable contact, at least one branch having a resistor in series with the first contact device, and the other branch including a vacuum element with a second contact device connected in parallel with the vacuum element in the second connection branch. Alternatively, the contacts of a change-over switch are connected to the two connection branches and a vacuum element is connected between the contacts of the change-over switch.
    Type: Grant
    Filed: October 26, 1976
    Date of Patent: March 28, 1978
    Assignee: ASEA Aktiebolag
    Inventor: Peter Palmer