Patents by Inventor Frederick W. Roberts, deceased

Frederick W. Roberts, deceased 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).

  • Gas density detecting apparatus
    Patent number: 3981178
    Abstract: There is disclosed an apparatus and process for detecting changes in the density of a gas wherein the gas to be measured is introduced into a closed casing at the rotary axis of a hollow disc wheel rotating within the casing. The disc wheel is provided with a plurality of radial vanes and the gas is centrifuged by the rotating disc. A Pitot tube positioned at the periphery of the disc measures the force exerted by the centrifuged gas to ascertain its mass which is then compared with a reference pressure.
    Type: Grant
    Filed: April 11, 1974
    Date of Patent: September 21, 1976
    Assignee: Rolock Incorporated
    Inventors: Lloyd R. Jones, Frederick W. Roberts, deceased