Patents by Inventor Hermann Turnwald

Hermann Turnwald 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).

  • Traveling wave tube comprising periodic permanent magnetic focusing system with glass/epoxy retaining means
    Patent number: 4820955
    Abstract: A traveling wave tube has a cylindrical vacuum envelope surrounding a delay line. The vacuum envelope is tightly surrounded by a permanent magnet system of ring-shaped pole discs and of magnetic rings respectively arranged between the pole discs and oppositely polarized in alternating fashion in an axial direction. The permanent magnet system is inserted into an outer envelope in form-fit fashion. An attitude and position retention for the focusing elements which is resistant to temperature shock is provided in the traveling wave tube. For this purpose the permanent magnet system is glued at its outside generated surface and the glue is formed of a mixture of an epoxy resin having adhesive properties and of glass fibers provided therein in an undirected attitude. This traveling wave tube is useful given extreme temperature fluctuations, such as in a range from -60.degree. C. through +95.degree. C.
    Type: Grant
    Filed: November 25, 1987
    Date of Patent: April 11, 1989
    Assignee: Siemens Aktiengesellschaft
    Inventors: Gerit Boehme, Hermann Turnwald