Patents by Inventor Christopher John Edgcombe

Christopher John Edgcombe 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).

  • Velocity modulation tubes employing harmonic bunching
    Patent number: 4100457
    Abstract: A klystron tube is provided with a long drift tube between the last prebuncher interaction gap and the first buncher interaction gap. The length of the long drift tube is such that in a preferred embodiment the ratio of the peak R.F. gap voltage to the D.C. beam voltage is between 1.4 .times. Wq/w and 2Wq/w where Wq is the reduced plasma frequency in radians per second and w = 2.pi. .times. signal frequency. By this means the distribution of the electrons in the beam is improved.
    Type: Grant
    Filed: December 13, 1976
    Date of Patent: July 11, 1978
    Assignee: English Electric Valve Company Limited
    Inventor: Christopher John Edgcombe
  • Resonant cavity tubes
    Patent number: 4049995
    Abstract: A klystron cavity is modified to raise its resonant frequency. The central portion of one end wall of the cavity is set back from the other end wall to reduce the capacitance between the central portion and the drift tube projecting from the other wall. A central portion of the other end wall may also be set back if required.
    Type: Grant
    Filed: May 6, 1976
    Date of Patent: September 20, 1977
    Assignee: English Electric Valve Co., Ltd.
    Inventor: Christopher John Edgcombe