Patents by Inventor John W. Coltman

John W. Coltman 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).

  • Conical transducer and reflector apparatus
    Patent number: 4025805
    Abstract: The invention provides a transducer for use with a conical reflector in which the transducer comprises a frusto-conical radiating member that is coaxially positioned with respect to the reflector member. The half angles of the radiating member and reflectors are related such that every ray from a selected point of interest on the axis that is reflected from the reflector cone to the active surface of the radiating member intersects substantially normally to the active surface.Where the energy is directed to a point of interest distant from the reflector, the half angles are related in accordance with the formula ##EQU1## ; AND, WHERE THE POINT OF INTEREST IS ON THE AXIS, THE HALF ANGLES ARE RELATED IN ACCORDANCE WITH THE FORMULA ##EQU2## where .phi. = CONICAL REFLECTOR HALF ANGLE;.theta.
    Type: Grant
    Filed: April 15, 1975
    Date of Patent: May 24, 1977
    Assignee: Westinghouse Electric Corporation
    Inventors: John W. Coltman, Charles H. Jones