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:
Aug. 18, 1987
Filed:
Sep. 09, 1983
Karl-Heinz Raffalski, Wheatley Heights, NY (US);
Theta Industries, Inc., Port Washington, NY (US);
Abstract
Deformation dilatometers are described for heating, deforming and cooling a test specimen, as well as for measuring changes in the linear dimensions of that specimen. A ferrous metal specimen, that is held between a fixed and a movable fused silica or quartz platen, first is heated by a high frequency induction coil and then crushed by the application of a hydraulic force to the movable platen. The hydraulic force then is withdrawn and, as the specimen is cooled by a jet of quenching gas, changes in its linear dimension are measured by a linear variable differential transformer which is coupled through ceramic pushrods to the platens. Use of fused silica or quartz platens in deformation dilatometers permits the accurate simulation of steel mill forging and rolling operations and enhances the usefulness of the instruments for studying phase changes in steel and determining optimum heating and quenching rates.