Abstract: A transducer is constructed by the deposition of conductive leads by thick film deposition techniques and the deposition of resistive material on the substrate by thin film deposition techniques in electrical contact with the leads.

Abstract: A wick lubrication scheme provides sufficient quantities of oil for bearing lubrication on high speed shafts even under low atmospheric pressure conditions as exist as high altitude.

Abstract: An improved stiffener element for use in foil journal bearings provides damping of eccentric shaft rotation in both bending and compression modes of operation and also provide greater load capacity and higher speeds for the bearing.

Abstract: A turbine is disclosed which is adapted to receive and utilize fluid from multiple sources simultaneously. The fluid from each source is utilized optimumly by providing a section of the turbine adapted for the characteristics of each fluid source.

Abstract: A fuel control system for a gas turbine engine provides fully optimized performance with combined mechanical and electronic control system components. In the event of electronic system failure, the mechanical component system operates the engine at a safe, reduced performance level.

Abstract: A control for a compartment fluid pressure regulating system in which the control provides pressure signals to an outflow valve by way of fluid pressure signal transmission means, has a chamber coupled to two fluid pressure sources. The control has fluid flow control means to control the passageways between the chamber and the pressure sources, the flow characteristics of the two flow controls differing.

Abstract: A system for producing neutron pulses seriatim in which a smaller, high velocity, sub-critical, downward traveling slug intercepts a larger downward falling sub-critical target-mass, both of which have a portion of higher concentration in fissile materials. The combined masses are more than prompt-critical and the resulting neutron and energy pulse is contained within a large pressure vessel. Spray of mostly sodium slurry protects the walls of the vessel from the effects of the neutron and energy pulse and absorbs the energy and neutron excess of the energy-neutron pulse. Heated slurry is drained from the pressure vessel to provide useful heat energy and neutron irradiated materials. Precipitated materials and sodium are used in the fabrication of both the slug and target-mass.

Abstract: A nuclear reactor system which produces useful thermal power and breeds fissile isotopes wherein large spherical complex slugs containing fissile and fertile isotopes as well as vaporizing and tamping materials are exploded seriatim in a large containing chamber having walls protected from the effects of the explosion by about two thousand tons of slurry of fissile and fertile isotopes in molten alkali metal. The slug which is slightly sub-critical prior to its entry into the centroid portion of the chamber, then becomes slightly more than prompt-critical because of the near proximity of neutron-reflecting atoms and of fissioning atoms within the slurry. The slurry is heated by explosion of the slugs and serves as a working fluid for extraction of heat energy from the reactor. Explosive debris is precipitated from the slurry and used for the fabrication of new slugs.

Abstract: A pneumatic device is responsive to changes in temperature to vary a controlled pressure. Means are provided to vary the temperature response characteristics in accordance with changes in altitude or other variations in ambient pressure.

Abstract: Current transformers are utilized to combine the outputs of two 30.degree. phase shifted inverters to produce a three phase output which is low in fifth and seventh harmonics. The arrangement utilizes transformers having volt-ampere ratings which are very low compared to the power output of the inverters. The circuit may also be used to convert a three phase input to a multi-phase full wave rectified output without reflecting high fifth and seventh harmonics back into the line.

Abstract: A temperature control system safely and efficiently protects critical aircraft surfaces from reaching fuel auto ignition temperature with cooling provided by a relatively small and light heat exchanger.

Abstract: A plurality of fuses are connected in a general parallel configuration for protecting a circuit, the fuses being serially connected with inductances of varying magnitude such that steady state current may be divided equally among the fuses permitting the use of fuses of lower rating. During an overcurrent surge, substantially the entire current overload is applied to each fuse in turn so that the total elapsed time for opening the circuit is less than with fuses alone.

Abstract: Limit stop apparatus wherein a driven shaft rotates a predetermined number of revolutions in either direction whereupon a travelling nut assembly contacts a shock absorbing stop to terminate shaft rotation by frictionally jamming screw threads between the nut assembly and the driven shaft. Outer and inner portions of the nut assembly are connected for limited relative rotational motion on non-jamming auxiliary threads, thus permitting the driven shaft to be backed off to release the nut assembly from the shock absorbing stop and thereby release the jammed threads with a minimum of available torque. By this structure, locking of the limit stop at either end is prevented.

Abstract: An electric power supply system for a load wherein two prime movers, a gas turbine and a synchronous electric motor receiving its motive energy from a source of electric power, such as a public utility, are utilized to simultaneously drive an electric generator. A fuel controller, which is responsive to the output of the generator, operates in an isochronous mode and regulates the supply of fuel to the gas turbine from a fuel source to bring the turbine, generator, and motor up to operating speed. A paralleling controller, which is responsive to both the output of the generator and the output of the utility power source connects the motor to the utility when the outputs of the generator and utility are of equal frequency and phase so that the motor shares the load in driving the generator.

Abstract: A formed plate heat exchanger of the air and hot gas counterflow type for gas turbines with provision for thermal response zones of different heat transfer capability in the hot gas passages of the core, each succeeding zone in the gas flow direction having greater heat transfer capability than a preceding zone to reduce temperature gradients and core thermal fatigue, with elimination of core cracking and splitting.

Abstract: A dynamolectric machine stator has a primary winding for single phase alternating current input and a secondary winding for polyphase alternating current to be supplied from output terminals. The secondary winding is connected such that at least two frequencies are provided at the terminals. The rotor has two windings thereon for excitation, one being excitable for one frequency output and the other rotor winding being excitable for another frequency output at the secondary terminals. Another secondary winding may be provided on the stator to obtain a desired output terminal voltage at one of the selected frequencies.

Abstract: A dynamoelectric machine stator has a primary winding for single phase alternating current input and a secondary winding for polyphase alternating current to be supplied from output terminals. The secondary winding is connected such that at least two frequencies are provided at the terminals. The rotor has two windings thereon for excitation, one being excitable for one frequency output and the other rotor winding being excitable for another frequency output at the secondary terminals. Another secondary winding may be provided on the stator to obtain a desired output terminal voltage at one of the selected frequencies.

Abstract: A plurality of nested rims are mounted on spokes of a flywheel hub member in a manner causing the rim assembly to have a noncircular configuration while the flywheel is at rest. Expansion of the rim assembly and the hub member during high speed flywheel operation causes the rim assembly to assume a substantially circular configuration with each rim frictionally engaging its adjacent rims while the inner rim is frictionally engaged by the spokes.

Abstract: An open loop air cycle air conditioning system draws ambient air into a turbine for expansion and cooling. The air passes through a heat exchanger where it withdraws heat from recirculated cabin air and is passed to a compressor which is operatively coupled to and driven by the turbine to partially recompress the air. The air is directed from the compressor to the intake manifold of the airplane engine. Valves may be positioned at the ambient air inlet to control the flow of air through the air conditioning system and into the engine. Water can be sprayed into the low pressure air at the heat exchanger to provide substantial additional cooling by evaporation.

Abstract: Air at substantially ambient pressure is cooled in a heat exchanger and introduced into an enclosure for cooling. The air is withdrawn from the enclosure and a portion of the air is expanded through a turbine for additional cooling and passed through the heat exchanger for the removal of heat therefrom. The air is then compressed to substantially ambient pressure and expelled. Additional cooling of the expanded air from the turbine may be obtained by evaporating a fluid therein. The fluid may be water condensed in, and withdrawn from, the heat exchanger.