Patents by Inventor Roy E. Hickey

Roy E. Hickey 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).

  • Backlash free lens focusing apparatus
    Patent number: 4068935
    Abstract: Apparatus for focusing a lens or lenses in which the focus adjustment is stable and in which backlash is reduced to an imperceptible level without the use of precision components. A unitary lens carrier is mounted on a shaft for axial displacement thereon and includes a first section spaced from a second section. A rotatable cam is mounted between the two sections and a spring is disposed between the cam and the second section to urge the cam against a surface portion of the first section. Rotation of the cam causes axial displacement of the lens carrier.
    Type: Grant
    Filed: September 20, 1976
    Date of Patent: January 17, 1978
    Assignee: The Singer Company
    Inventors: Richard H. Koester, Roy E. Hickey