Abstract: An area detection device for use with X-ray or ultraviolet radiation wherein light from an integrating device is passed through an optical fiber to fall on a phosphor-containing film which is capable of storing a diffraction pattern formed by the transmission of X-rays or ultraviolet radiation through a sample when the diffraction pattern is projected onto the film and also being capable of fluorescing in correspondence to the diffraction pattern. Fluoresced light from the film is directed back along the fiber and into the integrating device and is fed from the integrating device to a photomultiplier which sends a signal from which the diffraction pattern can be detected.

Abstract: In rocket engines power is usually obtained by burning fuel and oxidizer. The two are mixed, pressurized, and directed to a combustion chamber by means of turbopumps. Hydrostatic bearings have been proposed for use in these turbopumps because during flight, hydrostatic lubrication can reduce roller bearing wear. But during startup, acceleration and shutdown high pressure fluids are not available to provide fluid lubrication for hydrostatic bearings. During these periods a second bearing is required to carry the load, rendering hybrid bearings desirable for rocket engine turbopumps. Herein a hybrid hydrostatic-rolling element bearing has been provided. The rolling element bearing is locked on a stationary housing through which a rotating journal passes. A transient supporting ring is keyed to the journal. It is adapted to lock on the rolling element bearing so that the rolling element bearing supports radial loads during startup, initial acceleration, deceleration and shut down, and to release at high speeds.

Abstract: Presented is a fluid property measuring device which can be used to measure he viscosity, the density, the volumetric flow rate, and the mass flow rate, of a fluid without using moving parts. The fluid property measuring device comprises a linear fluid resistor, a nonlinear resistor, and a linear, fluid property independent, volumetric flowmeter, Two nonlinear resistors, or two linear resistors, may be used instead of a linear and nonlinear resistor. The linear, fluid property independent, volumetric flowmeter comprises a fluidic negative feedback oscillator in fluid connection with a fluidic buffer laminar proportional amplifier.