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:
May. 23, 1989
Filed:
Jun. 30, 1988
Harry R Meline, Minnetonka, MN (US);
Eric L Paulsen, Wayzata, MN (US);
MTS Systems Corporation, Eden Prairie, MN (US);
Abstract
A self-supporting extensometer for use with rectilinear specimens has one arm that contacts a specimen edge on two points that are spaced apart in a longitudinal direction of the specimen, and a second arm which engages an opposite edge of the specimen at a single substantially point contact under a spring load urging the arms together. The specimen contact arms are notched to receive edges of the rectilinear specimen. The second specimen contact arm has single point contact and has a curved surface which engages a side edge of the specimen so that contact with the specimen is at a point. The support assembly includes a releasable hold-down or clamp spring that bears on the surface of the specimen opposite from the extensometer to clamp the extensometer in place. The spring loading of the extensometer arms and the hold-down spring supports the weight of the extensometer directly on the specimen.