Patents Assigned to James G. Henderson
  • Displacement sensing and guide apparatus
    Patent number: 4054251
    Abstract: A displacement sensing and guide apparatus for continuous sheet material wherein the edges of a moving sheet of material are sensed by electromechanical or other variable voltage or variable impedance sensing and feedback means and communicate electrically with an electrical switching system, either directly or through a balanced bridge circuit, to operate the switching system and to indicate and to correct a displacement of the sheet material from a predetermined position.
    Type: Grant
    Filed: May 4, 1976
    Date of Patent: October 18, 1977
    Assignee: James G. Henderson
    Inventors: James G. Henderson, David O. Hanon