Patents by Inventor Alec G. Allen

Alec G. Allen 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).

  • Apparatus including electric current transfer
    Patent number: 4444445
    Abstract: Apparatus consuming heavy electric current, such as an arc furnace, has concentric members (1) and (3) between which the current has to be transferred. The member (3) can rotate around, and/or move axially with respect to, member (1). Interposed, an annular member (2) has helically twisted tufts (11) of copper wire slidably retained by bushes (12) in a hole (10). The copper wires are compressed to fit between the members (1) and (3), and the compression is stored as elastic helical twisting energy, ensuring good contact pressure to transfer current between the members (1) and (3).
    Type: Grant
    Filed: January 20, 1982
    Date of Patent: April 24, 1984
    Assignee: National Research Development Corporation
    Inventors: Evan J. Davies, Alec G. Allen