Patents Assigned to Duca Manufacturing & Consulting, Inc.
  • AC melt to bushing current detector
    Patent number: 7633734
    Abstract: An AC melt to bushing current detector (FIG. 4) for a channel induction furnace (FIG. 1) which can detect when molten metal from the loop (122) in a saturated inductor (FIG. 5) has come in contact with the metal bushing (236) whereupon the power to the induction coil (234) is turned off, preventing a catastrophic molten metal run out through the bushing (236).
    Type: Grant
    Filed: November 2, 2006
    Date of Patent: December 15, 2009
    Assignee: Duca Manufacturing & Consulting, Inc.
    Inventors: John P. Richardson, Timothy T. Owens