Other

Universities Research Association, Inc.

Finley W Markley

Ralph C Niemann

John D Gonczy

Branislav M Dragisic

William R McCaw

An apparatus for evaluating the tensile and compressive properties of material samples at very low or cryogenic temperatures employs a stationary frame and a dewar mounted below the frame. A pair of coaxial cylindrical tubes extend downward towards the bottom of the dewar. A compressive or tensile load is generated hydraulically and is transmitted by the inner tube to the material sample. The material sample is located near the bottom of the dewar in a liquid refrigerant bath. The apparatus employs a displacement measuring device, such as a linear variable differential transformer, to measure the deformation of the material sample relative to the amount of compressive or tensile force applied to the sample.

Apparatus for measuring tensile and compressive properties of solid

A shield from a laser beam has an upper material which disperses the laser beam into a larger cross sectional area, and a lower material which reflects the dispersed laser beam back through the upper material. The upper material may be a woven fiberglass sheet and the lower material may be a sheet made of woven metallic wires. The shield may be made from cylindrical fiberglass and metallic fabric as a shield for an endotracheal tube for use during laser surgery of a patient`s throat region. The materials may be made in sheets to form protective drapes for protection of equipment from a laser beam during laser surgery. An umbrella having a reflective surface that unfolds under pressure from a balloon used to secure an endotracheal tube in a patient's throat protects the balloon from the laser beam during laser surgery.

Growing community of inventors

St. Charles, IL, United States of America

Finley W Markley