Patents by Inventor Michael K. Waldo

Michael K. Waldo 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).

  • Temperature compensating apparatus for microwave oscillators and the like
    Patent number: 4127834
    Abstract: A housing with a microwave cavity and an external opening defined therein, a tubular waveguide section affixed in said opening with a tuning rod slideably positioned therein and an outer end affixed to an outer end of a sleeve mounted in surrounding relationship thereto with the inner end of the sleeve affixed to the housing. The sleeve and tuning rod are formed of dielectric material so that temperature changes on the sleeve cause movement of the rod in the cavity and compensate for changes in the resonant frequency of the cavity while the rod and the waveguide cooperate to prevent radiation leakage.
    Type: Grant
    Filed: August 29, 1977
    Date of Patent: November 28, 1978
    Assignee: Motorola, Inc.
    Inventors: Martin S. Stringfellow, Michael K. Waldo