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:
Jan. 31, 1978
Filed:
Aug. 21, 1975
Graham John Siddall, Keyworth, EN;
The Rank Organisation Limited, London, EN;
Abstract
A roundness measuring instrument of the type having a workpiece table and a pick-up carried on a pick-up mount which is radially adjustable to move the pick-up radially with respect to a fixed axis about which the table is rotatable, in which there is provided a displacement transducer sensitive to the movement of the pick-up mount in the radial direction. A device for summing the signals from the displacement transducer and from the pick-up is used to provide a wide range signal usable in metrological determinations on workpieces, such as determinations of radius and separation of two plane faces. A computer for calculating the value of a predetermined algorithm may also be provided to obviate the necessity for centering either a reference body or the workpiece with respect to the axis of rotation of the table.