Abstract: A method for the manufacture of shock attenuating, low rebound polyurethanes in which polyols are reacted with polyisocyanates having a functionality of at least 2.3 at an isocyanate index of from about 65 to about 90.

Abstract: An insole for high heel footwear is designed to provide comfort and support cushioning and significantly reduce shock and vibration through the skeletal system. The insole is comprised of a relatively thin layer of open cell, flexible, resilient foam of low compression set, a heel bucket which extends into the heel of the shoe or an implant which is posiitoned at the heel and a metatarsal insert. The heel bucket or implant, and the metatarsal insert are formed from a shock absorbing, viscoelastic polyurethane elastomer to moderate the accleration of heel and metatarsal strike generated shock waves.

Abstract: An apparatus for the electronic generation and comparision of non-predictable codes.

Abstract: A sensor for a hydro resistance anemometer is designed for immersion in a flowing fluid to provide flow velocity information. The sensor is of a cylindrical configuration with a hemispherical nose. A driving electrode extends axially along the sensor and is exposed to the flowing fluid only at the center of the hemispherical surface of the sensor nose. A reference electrode of annular cylindrical configuration is disposed coaxially about the driving electrode and separated therefrom by a dielectric insulating material. The power dissipated through the sensor is typically on the order of only ten milliwatts.