Patents by Inventor Edward J. Walker

Edward J. Walker 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).

  • Method and apparatus for the measurement of airborne fibres by the illumination of fibrous particles precipitated on a surface
    Patent number: 4916325
    Abstract: Apparatus for measuring the quantity of fibres present in a gaseous fluid is based on the use of a nozzle to align the orientation of fibrous particles as they flow into a chamber. A charge is applied to the particles which are then precipitated on to a carrier. They are sequentially illuminated in directions normal and transverse to the direction of orientation and from measurements of the relative attenuation of the radiation, an indication of the number of precipitated particles is derived.
    Type: Grant
    Filed: September 27, 1988
    Date of Patent: April 10, 1990
    Assignee: National Research Development Corporation
    Inventors: Anthony P. Rood, Edward J. Walker