Repository: UIHistories Project: Board of Trustees Minutes - 1972 [PAGE 516]

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506

BOARD OF TRUSTEES

[January 19

of Food Engineering in Food Science, Urbana, and Walter C. Yackel, Research Associate in Food Science, Urbana, inventors. This invention uses a hollow needle for gas injection. This needle has only one hole and that is at its tip. The most important difference between this method and apparatus and former methods and apparatus is that the foodstuff is frozen separately and then the needles are gradually pushed into the foodstuff as drying progresses. T h e advantage here is that the tip of the needle is always at the receding ice front and all the gas is injected at the drying interface where it is of the greatest benefit in accelerating freeze drying. The Committee recommends that the rights of the University in this invention be released to the inventors. 7. Speed control of step motors — Emil Lander, Research Assistant in Electrical Engineering, Urbana, Richard A. Yackel, Research Associate in Electrical Engineering, Urbana, and Gurdial Singh, Research Associate in Electrical Engineering, Urbana, inventors; developed under the sponsorship of Warner Electric Brake & Clutch Company. The basic idea is to insert a time delay into the feedback loop of the motor, the duration of which is determined by the desired final speed. The Committee recommends that the rights of the University in this invention be assigned to the sponsoring agency. 8. Continuous flow concrete mixer — Edwin L. Hansen, Professor of Agricultural Engineering, Urbana, inventor. This is a combination auger and vibrator. Materials are metered in at one end and mixed concrete is discharged at the other. The idea of continuous mixing is not new, but the use of the vibrator for mixing may be. T h e Committee recommends that the rights of the University in this invention be released to the inventor. 9. Internal vibrating concrete screed — Edwin L. Hansen, Professor of Agricultural Engineering, Urbana, and Steven George Hubble, Graduate Student, U r bana, inventors. A concrete strike-off screed vibrates the concrete internally, especially near the bottom edge next to the mold liner. This compacts the mix and liberates entrapped air at the lower surface of the concrete which in turn makes a flawless surface when the concrete slab is removed from the mold. T h e Committee recommends that the rights of the University in this invention be released to the inventors. 10. Bone pulverizer — Frederick H . Wezeman, Research Associate in Orthopaedic Surgery in The Abraham Lincoln School of Medicine, Medical Center, inventor. A bone, cartilage, or general tissue pulverizer is constructed of two pieces of nonmagnetic stainless steel. This pulverizer is capable of pulverizing completely any tissues (soft or hard) at low temperatures. If necessary, high temperatures could also be used simply by heating the item prior to use. Whereas this would be applicable for hard tissues such as bones and teeth, it would not suffice for soft tissues since "fracture compression" is a necessary requirement for these tissues which therefore must be in a frozen state. T h e Committee recommends that the rights of the University in this invention be released to the inventor. 11. Oscillating mass flow probe — S. L. Soo, Professor of Mechanical and Nuclear Engineering, Urbana, inventor; developed under the sponsorship of Detroit Edison Company. This design does two things: (1) renders the probe insensitive to flow velocity because change of 60 fps to 80 fps now only changes the intensity of impact by 2 per cent, and (2) the probe current is magnified because of greater amount of charges being transferred with a more severe impact produced by the vibrator. The Committee recommends that the rights of the University in this invention be released to the inventor, subject to the rights of the sponsoring agency. 12. Immunodisc electrophoresis — Sanit Makonkawkeyoon, Graduate Student in Microbiology, Medical Center, inventor. An immunodisc electrophoretic technique for performing antigenic analysis of complex materials is described. The acrylamide gel for electrophoresis is polymerized in the form of a hollow cylinder by placing a Plexiglas rod in the middle of the tube. Subsequent to electrophoresis the rod is removed and the lumen is filled with the antiserum mixed with molten