Patents by Inventor M. Kirkbride

M. Kirkbride 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 of producing a metrological scale and scale produced by such method
    Patent number: 4926566
    Abstract: A metrological scale for use in optoelectronic scale reading apparatus comprising a tape made of spring steel and having a surface layer of copper. The scale has scale marks constituted by a zig-zag or other profile impressed into the surface layer by a rolling process. During rolling, the relatively soft copper is readily deformed to accept the profile while the spring steel resists plastic elongation of the tape.
    Type: Grant
    Filed: June 15, 1989
    Date of Patent: May 22, 1990
    Assignee: Renishaw PLC
    Inventors: D. R. McMurtry, W. F. N. Stephens, M. Kirkbride