Abstract: The need for specialized tooling which was previously required to accurately place the first layer of turns in a precision winding of a rotor having an even number of layers of turns is eliminated by providing self-fixturing wire-guiding features in corners of slots in the rotor which receive the winding, thereby facilitating the manufacture or repair of precision-wound rotors. In some exemplary embodiments, the self-fixturing wire-guiding features are provided by configuring the corners of the slots to include a chamfer or shoulder. In other exemplary embodiments, a specially shaped slot liner inserted into the slots includes a corner spacer which provides the self-fixturing wire-guiding feature.

Abstract: A sensor detects skewed adjacent movable component. The sensor may be used to detect harmful skews of aircraft control surfaces, such as slats or flaps on aircraft wings, which may be caused by an actuator disconnection from the surface it drives. Harmful skew, which is a relative asymmetrical motion of control surfaces beyond a predetermined limit, is detected by the sensor, but the relatively smaller harmless skew caused by normal flight is ignored. The sensor comprises first and second arms connected to a common base that may be attached to a first control surface. A constraining means such as a mechanical fuse holds the arms together while a separating means such as a spring exerts a separating force on the arms when the fuse breaks. A switching means is integral to the two arms. A striker pin on a second control surface strikes the first or second sensor arm when the relative motion between the control surfaces exceeds a certain predetermined limit.

Abstract: An improvement in a generator having a rotor, a stator, a magnetic field structure disposed on one of the rotor and the stator and an armature winding disposed on the other end of the rotor and the stator wherein the armature winding is disposed in a useful flux path comprises an additional armature winding disposed in a leakage flux path wherein auxiliary power is developed by the additional armature winding for one or more electrical loads.

Abstract: A rotary screw compressor system is provided wherein the base plate connecting the prime mover to the compressor integrates the drive transmission with the lubricating fluid flow path between lubricating circuit components. Each of those circuit components and the compressor is removably mounted to the base plate via segregating housings. The compressor is mounted to the base plate with drive shaft and working fluid outlet on the same side. A pre-separation chamber is included within the base plate to facilitate removal of lubricant from the compressed working fluid prior to passage of the working fluid through the separator component. A double seal arrangement is provided about the connection of the prime mover drive shaft to the base plate. That seal arrangement includes a lubricant collection chamber between the seals, and control air is used to recycle lubricant from that chamber to the air inlet of the compressor.

Abstract: A hydrostatic seal is provided having control of sealing surface taper and cavitation reduction structure between the sealing surfaces. Control of sealing surfaces taper is provided through one or more relief recesses in the seal wall to which flexing forces are applied by fluid pressure and temperature to reduce the effects of seal rigidity on the parallel relationship between the sealing surfaces. The cavitation reduction structure includes inclination of the channels leading to the sealing surface recesses in the direction of relative movement of the fluid between the sealing surfaces. Enlarged vortex chambers are disposed at the outlet of those channels within the recesses to isolate fluid vapor bubbles from the recess walls.

Abstract: An inverter includes first and second subinverters each having inputs connected in series with the input of the other subinverter across a DC voltage and each further having a switch coupled to an output. A summing circuit includes a first input coupled to the output of the first subinverter, a second input coupled to the output of second inverter and an output. A control circuit is coupled to the subinverters and operates the switches such that a summed AC waveform is produced at the output of the summing circuit. Each switch is subjected to only a portion of the DC voltage.

Abstract: A mechanical face seal is provided that incorporates fluid passages through either or both of a first and a second element of the seal for directing a flow of cooling fluid to an exposed area of the second element which extends radially outward beyond the contact area of the seal. The fluid passages are configured and oriented to provide more cooling flow through each seal element and over the surfaces of each seal element then is achievable with prior cooling and lubrication approaches, to thereby enhance heat dissipation from the elements of the seal to such a degree that lubrication, seal life and performance of the seal are improved. In preferred embodiments of the invention, the seal elements are specially configured to create an annular gap between the elements for centrifugally pumping fluid away from a contact area of the seal.

Abstract: Cavitation in axial piston motors (20) caused to act as a pump by an aiding load (28), and the related difficulty of loss of hydrostatic film (52), and tipping or hammering of motor slippers (64), can be reduced by a method which includes the step of recirculating hydraulic fluid from the supply port (18) of the motor (20) to the return port (30) of the motor (20) upon the occurrence of an aiding load (28).

Abstract: A thermally compensated assembly for a generator for controlling the stress on a stator within a housing subject to temperature changes. The thermally compensated assembly includes a stator, a housing enclosing the stator, first and second thermal compensation members provided on each end of the stator and means for securing the first and second thermal compensation members with respect to the housing. The thermal compensation members are provided with angled portions disposed with respect to each other. The angle of the angled portions may be chosen equal or slightly different than a predetermined angle to provide a constant or variable axial load on said stator when said thermally compensated assembly is subject to changes in temperature.

Abstract: An apparatus for determining a frequency component of a signal exploits the aliasing effect by sampling the signal at the frequency of the component (or an integer multiple thereof) to produce first and second sets of samples at the sampling frequency. Corresponding samples of the first and second sets of samples are separated in phase by substantially 90.degree.. The apparatus vectorially determines the magnitude and phase of the frequency component of the signal from the first and second sets of samples.

Abstract: A cooling system is provided for compartments containing a heat generating apparatus, such as solid state variable speed constant frequency system, whose functionality is essential and whose cooling needs vary significantly during use. A main coolant channel is used to provide cooling to the heat generating apparatus under normal operating conditions. During an overtemperature condition; an auxiliary coolant channel provides additional coolant to the heat generating apparatus. Both of the channels are partially disposed within the heat generating apparatus, and they are both completely separate and free of fluid communication with each other. Each channel also contains a pump, such as a fan, for applying a motive force necessary to deliver the coolant to the heat generating apparatus.

Abstract: This invention relates to a combustor heat shield assembly for a containment ring for use in a radial inflow turbine engine having a compressed air supply and a combustor. The combustor heat shield assembly includes a turbine nozzle assembly which is adapted for receiving a mixture of compressed air and combustion by-products delivered by the combustor to drive a turbine impeller of the radial inflow turbine engine about an axis of rotation. The turbine nozzle assembly is integrally connected with and in close radial proximity to the containment ring. A heat shield, provided with slots, is coupled to the turbine nozzle assembly and thermally adapted for providing a circumferentially uniform seal between the turbine nozzle assembly and the heat shield during operation of the radial inflow turbine engine.