The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 25, 2008
Filed:
Jul. 16, 2003
David Roberts Mcmurtry, Dursley, GB;
James Reynolds Henshaw, Stroud, GB;
Alexander David Scott Ellin, Horsley, GB;
David Roberts McMurtry, Dursley, GB;
James Reynolds Henshaw, Stroud, GB;
Alexander David Scott Ellin, Horsley, GB;
Renishaw PLC, Gloucestershire, GB;
Abstract
A rotary ring for use in scale reading apparatus, comprises a flexible ring () which has scale markings () provided on a surface thereof. The rotary ring is mounted onto a machine part () by providing the machine part with a region of increased diameter () and stretching or shrinking the flexible rotary scale () over said region of increased diameter. The manufacturing tolerance of the rotary scale or differential e.g. thermal expansion is thus taken up by stretching or shrinking it into place. The region of increased diameter may comprise an annular protrusion or an O-ring, for example.