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:
Jun. 18, 1985
Filed:
Oct. 15, 1982
Akihisa Narimatsu, Tokyo, JP;
Hiroyuki Ohkubo, Tokyo, JP;
Sony Magnescale Incorporation, Tokyo, JP;
Abstract
A scaling device employs a first, outer cylinder, a longitudinal scale having detectable indicia thereon, and a second cylinder of lesser diameter than the first cylinder but of greater diameter than the radial extent of the scale. The cylinders and the longitudinal scale are disposed coaxially, with the scale affixed at one end thereof to an end cover plate in one end of the first cylinder. The second cylinder is journalled in a bearing in an end cover plate in the other end of the first cylinder for axial movement relative to the first cylinder over the longitudinal scale. A scale detector element is disposed at one end of the second cylinder to detect indicia on the scale and to generate scale signals in response to longitudinal relative displacement of the first and second cylinders. A third cylinder affixed to and disposed within the second cylinder defines an annulus between the second and third cylinders through which leads from the detector element can extend. A fitting can be provided for admitting pressurized air to the first cylinder. A spring and bearing arrangement can be used for centering the longitudinal scale relative to the cylinders.