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:
Oct. 16, 2012
Filed:
Aug. 09, 2010
Lawrence M. Robertson, Albuquerque, NM (US);
Emil V. Ardelean, Albuquerque, NM (US);
James C. Goodding, Albuquerque, NM (US);
Vit Babuska, Albuquerque, NM (US);
Lawrence M. Robertson, Albuquerque, NM (US);
Emil V. Ardelean, Albuquerque, NM (US);
James C. Goodding, Albuquerque, NM (US);
Vit Babuska, Albuquerque, NM (US);
The United States of America as represented by the Secretary of the Air Force, Washington, DC (US);
Abstract
A standard tensile test device is improved to accurately measure the mechanical properties of stranded cables, ropes, and other composite structures wherein a witness is attached to the top and bottom mounting blocks holding the cable under test. The witness is comprised of two parts: a top and a bottom rod of similar diameter with the bottom rod having a smaller diameter stem on its upper end and the top rod having a hollow opening in its lower end into which the stem fits forming a witness joint. A small gap is present between the top rod and the larger diameter portion of the bottom rod. A standard extensometer is attached to the top and bottom rods of the witness spanning this small witness gap. When a force is applied to separate the mounting blocks, the gap in the witness expands the same length that the entire test specimen is stretched.