Patents by Inventor Martin L. Grogan

Martin L. Grogan 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).

  • Modulation device for substituting for a double balanced mixer
    Patent number: 4313094
    Abstract: A modulation device that has a means for minimizing the time required for the diodes to alternate conductive and nonconductive states. The modulation device as disclosed includes an input port for the signal that is to be mixed, a local oscillator port for the application of the switching signal and a sum port for providing the product of the two signals. Modulation is achieved by the operation of the diodes that are used as switches which are controlled by the local oscillator signal.
    Type: Grant
    Filed: October 17, 1979
    Date of Patent: January 26, 1982
    Assignee: Rockwell International Corporation
    Inventor: Martin L. Grogan
  • Method and apparatus for protecting alternating current circuits
    Patent number: 4271449
    Abstract: A method and apparatus is disclosed for protecting a circuit from excessive current flow by pulse width modulation of a current sense signal and interrupting the circuit when the width of the pulse is less than a reference period.
    Type: Grant
    Filed: April 4, 1979
    Date of Patent: June 2, 1981
    Assignee: Rockwell International Corporation
    Inventor: Martin L. Grogan
  • Solid state AC power relay
    Patent number: 3940634
    Abstract: A trigger type device employing a pair of oppositely poled SCR's or a triac, provides bidirectional control of AC power through a simple circuit comprising a pair of rectifying diodes and an opto-electronic coupler.
    Type: Grant
    Filed: February 14, 1975
    Date of Patent: February 24, 1976
    Assignee: Rockwell International Corporation
    Inventor: Martin L. Grogan