Abstract: A rotating machine including a rotating shaft: a plurality of conductive rotor bars spaced from the rotating shaft and fixed to the rotating shaft through at least one intermediate member, where at least one of the plurality of conductive rotor bars have at least one first internal conduit; and a circulator for establishing a coolant circulation through the first internal conduit.

Abstract: A test fixture for testing microwave components enables components to be tested with high correlation between the component's test results and its operation in a system. The test fixture provides for non-destructive mounting of and connection of the component to the test fixture in the same manner as it will be connected in the final system and also provides for tailoring of the test connections as may be desired.

Abstract: A multimodule microwave system is assembled in a physically compact, high reliability manner employing a high density interconnect structure to interconnect the different modules of a microwave system by rendering the portion of the interconnect structure between modules flexible and by folding the interconnect structure on appropriate sized mandrels between the modules to place the modules in a multi-tier physical stack. Shielding and hermetic packaging may also be provided.

Abstract: A wide-aperture array, used to sonically measure range to a source, is calibrated by providing a beam of optical energy from a first location, rigidly affixed to a first end sensor of a trio of array sensors, through a lens at a second location rigidly affixed to a middle one of the trio of sensors, to an optical sensor of the retinal type at a third location, rigidly affixed to the remaining sensor, at the opposite end of an initially straight line from the first sensor, and then measuring the deviation of the beam at the retinal sensor due to deviation of the sensors from positions on a straight line. The wavefront curvature found for any energy received by the array sensors is corrected by the measured deviation.

Abstract: A reference voltage source, relatively insensitive to changes in ambient temperature and supply voltage, utilizes a plurality of charge transfer amplifiers each having a temperature-stable amplification factor determined essentially by the ratio of two capacitances and independent of temperature-related factors. The amplifiers operate to provide a punch-through reference device with a constant current to cause generation of a stable reference voltage.

Abstract: A solid state radiation flux detector system utilizes a detector element, consisting of a bar of semiconductor having electrical conductance of magnitude dependent upon the magnitude of photon and charged particle flux impinging thereon, and negative feedback circuitry for adjusting the current flow through a light emitting diode to facilitate the addition of optical flux, having a magnitude decreasing in proportion to any increase in the magnitude of radiation (e.g. X-ray) flux incident upon the detector element, whereby the conductance of the detector element is maintained essentially constant. The light emitting diode also illuminates a photodiode to generate a detector output having a stable, highly linear response with time and incident radiation flux changes.