Patents by Inventor Gerrard V. Howcroft

Gerrard V. Howcroft 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 filter having a temperature compensating element
    Patent number: 6734766
    Abstract: A microwave filter having a temperature compensating element includes a housing wall structure, a filter lid, a resonator rod, a tuning screw and the temperature compensating element. The housing wall structure defines a cavity. The filter lid closes the cavity. The resonator rod is within the cavity. The tuning screw is adjustably mounted through the filter lid and has a portion that protrudes into the cavity and is coaxial with the resonator rod. The temperature compensating element is joined to the filter lid or the housing and forms a bimetallic composite with the filter lid or housing that deforms with a change in ambient temperature.
    Type: Grant
    Filed: April 16, 2002
    Date of Patent: May 11, 2004
    Assignee: COM DEV Ltd.
    Inventors: David J. Lye, Ayyangar R. Harish, Gerrard V. Howcroft
  • Microwave filter having a temperature compensating element
    Publication number: 20030193379
    Abstract: A microwave filter having a temperature compensating element includes a housing wall structure, a filter lid, a resonator rod, a tuning screw and the temperature compensating element. The housing wall structure defines a cavity. The filter lid closes the cavity. The resonator rod is within the cavity. The tuning screw is adjustably mounted through the filter lid and has a portion that protrudes into the cavity and is coaxial with the resonator rod. The temperature compensating element is joined to the filter lid or the housing and forms a bimetallic composite with the filter lid or housing that deforms with a change in ambient temperature.
    Type: Application
    Filed: April 16, 2002
    Publication date: October 16, 2003
    Inventors: David J. Lye, Ayyangar R. Harish, Gerrard V. Howcroft