Patents by Inventor Richard Ironfield

Richard Ironfield 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).

  • Microwave oven control system
    Patent number: 4107501
    Abstract: A microwave oven system in which a magnetron supplies microwave energy to a microwave oven through an isolator structure comprising a three-port circulator having a microwave energy absorbing load coupled to the third port, with the temperature of said load being sensed by a first switch actuated at a first temperature level to maintain a flow of air across the load continuously between operating cycles of the oven and by a second thermally operated switch actuated at a higher temperature to disable the power supply for the magnetron.
    Type: Grant
    Filed: April 13, 1976
    Date of Patent: August 15, 1978
    Assignee: Raytheon Company
    Inventor: Richard Ironfield