Abstract: A compressed foam target, primarily for archery use, made of layered foam material. Cross-linked polyethylene foam sheets are used, each having a thickness of one-eighth (??) inch with a density of four (4.0) pounds per square inch. The foam sheets are assembled either horizontally or vertically to create the arrow receiving area and are compressed to a size 60% of their original size. After compression, the foam sheets are slidably placed into a reinforced flexible sleeve made of polypropylene which circumferentially restrains the foam sheets, but allows expansion of the foam sheets from the 40% compressed state to the 28% compressed state. The circumferentially restrained foam sheets create the arrow receiving area of the target which can then be placed within a frame to make the full scale target or can be molded within a polyurethane insert for use as a replaceable insert in a flat faced target or a three-dimensional target.
Abstract: An artificial horizon device producing a projected light bar perceivable with peripheral vision. The device includes a scanner assembly with a pair of rapidly movable scanning mirrors each selectively pivotal about respective mutually perpendicular axes. A beam of light is directed upon a first of the pair of scanning mirrors for reflection upon the second of the mirrors, and thence to illuminate a surface for perception as a relatively movable horizontal reference line. A single adjustment mirror is interposed between the source of the light beam and the first of the scanning mirrors. The adjustment mirror is selectively movable about two mutually perpendicular axes each substantially intersecting the reflective plane of the adjustment mirror in order to set a selected point of incidence for the light beam upon the first of the scanning mirrors.
Abstract: A two pole permanent magnet rotor which utilizes a single cylindrical two pole permanent magnet mounted between two end pieces and surrounded by a retaining hoop. The cylindrical two pole permanent magnet, which is made of high energy product material, is "straight through" diametrically magnetized to provide a sinusoidal air gap flux distribution which eliminates losses due to harmonics. The cylindrical two pole permanent magnet may be made of a plurality of smaller magnet blocks which are stacked and machined to form cylindrical configuration.
Abstract: A fuel composition for a reaction chamber which when combined with a selected reactant produces heat energy and hydrogen gas. A reaction chamber structure, method of making and method of operating the reaction chamber are also disclosed.
Abstract: A ball thrust antifriction bearing for operation at very high speed in the DN number range from 5.times.10.sup.5 to 2.times.10.sup.6 and higher while only marginally lubricated by a mist of liquid having comparatively poor lubricating qualities which is carried in a transporting air stream.
Abstract: Apparatus for cooling and thermally isolating turbocompressor foil bearings. The bearing journal includes a hollow shaft through which gas is positively circulated to cool the shaft. A slinger at one end of the shaft develops a centrifugal pumping action during operation of the turbocompressor by virtue of a plurality of radially directed gas passages. Pressurized gas may be introduced from the compressor into the interior of the hollow shaft and, after traversing the shaft, returned to the compressor. The invention includes arrangements for protecting the bearing against combustion products which may leak past turbine wheel seals by removing such combustion products before they can reach the bearing.
Abstract: A rotor-shaft assembly which includes a ceramic, solid hubbed turbine rotor having an integral stub shaft brazed within one end of a generally cylindrically shaped sleeve member. A metal shaft is either brazed or cold press fitted within the other end of the sleeve member in a torque transmitting relationship. The stub shaft is formed with an annular relief therearound in order to reduce the compressive forces acting on the stub shaft by the sleeve member.
Abstract: A heat exchanger of the type characterized by a plurality of heat exchanger tubes separated by cooling fins. The ends of the tubes being inserted into a leadless header plate and thereafter brazed thereto. The overall depth of the heat exchanger being approximately equal to the width of the heat exchanger tube plus twice the thickness of the material of the header plate. Heat exchange tube ends being inserted into slots formed in the header plate by use of an alignment tool.
Abstract: An air data sensor probe for providing measurements of total pressure, static pressure and angle-of-attack for an aircraft in flight. The probe is essentially cylindrical with a hemispherical nose. It has a vertically elongated central opening for measurement of total pressure and a plurality of off-axis openings, manifolded by pairs, to measure angle-of-attack. Static pressure is measured by a plurality of ports mounted back from the nose, manifolded together to provide the static pressure reading.
Abstract: A turbocharger includes spaced apart turbine housing and compressor housing sections which are connected by a center housing section. The center housing section journals an elongate shaft carrying at opposite ends thereof a compressor wheel and a turbine wheel rotatable in the respective housing sections. The center housing section also defines a closed cavity captively receiving a material conductive of heat and which transitions between lower and upper molecular energy levels during hot soak of the turbocharger following engine shutdown to control bearing temperature at the shaft.
Abstract: A cast austenitic stainless steel bushing for relatively high temperature turbocharger and automotive applications is provided having good hot hardness and hot strength properties and a co-effficient of thermal expansion approximating that of the parent housing alloy. Bushings made of this alloy have a composition in the range of 29-32% chromium; 4-8% nickel, 1.0-1.5% columbium and tantalum; 1.3-1.7% carbon, 0.25-0.45% sulfur, 0.3-0.4% nitrogen, up to 1.0% manganese, up to 1.0% silicon, up to 1.0% molybdenum, up to 0.1% phosphorous, balance iron.
Abstract: A stator for use with a permanent magnet rotor electrical machine is disclosed which stator eliminates ferromagnetic teeth previously used in stator cores. The stator of the present invention uses a winding support structure made of non-magnetizable, non-conductive material to support the stator windings, which may advantageously be prewound prior to installation on the winding support structure. The stator is easily adaptable to liquid cooling, and has substantially reduced losses due to its toothless design.
Abstract: A compressor wheel assembly for turbochargers and the like comprises a compressor wheel including a boreless hub formed integrally as by casting with a circumferential array of aerodynamically contoured centrifugal impeller blades. The wheel hub is secured at its base by inertia welding to a thrust spacer sleeve having an internally threaded bore for threaded reception of a rotatable shaft. In use of the compressor wheel assembly, the absence of a bore within the wheel hub substantially improves wheel fatigue life.
Abstract: A laminated aluminum fluidic device is constructed by sequentially coating the facing side surfaces of the aluminum laminae with layers of zinc, nickel and solder, positioning the facing pairs of solder layers in intimate contact, and heating the coated laminae to fuse the facing solder layers.
July 2, 1986
Date of Patent:
October 27, 1987
The Garrett Corporation
Bela Bunkoczy, James A. Wendorff, Walt W. Battin
Abstract: Disclosed is a steam engine which is used to propel underwater vehicles without exhausting combustion products to the surrounding water. A solid metallic fuel reacts in a first chamber with water to produce hydrogen which is subsequently reacted in a second chamber with oxygen to produce heat and water. The amount of water produced in the second chamber is equal to the amount of water used in the first chamber. Consequently, no excess water is produced.
Abstract: A lubrication system for expendable turbine engines, or for emergency use with durable engines, comprises a housing receiving a collapsible bladder filled with lubricant, and means for penetrating the bladder and communicating the lubricant to a receiver upon the occurrence of a predetermined event.
Abstract: A quartz pressure transducer is disclosed which includes four or five elements, three of which are diaphragms containing deposited metal electrodes on both sides thereof. Since the electrodes are all on the diaphragms, the transducer disclosed herein is highly resistant to errors caused by changes in temperature, while retaining excellent resistance to errors caused by acceleration or vibration forces. The transducer may be constructed as either an absolute pressure sensor or as a differential pressure sensor, and in the primary embodiment contains a reference capacitance which may be used by appropriate electronic circuitry to provide compensation for acceleration or vibration forces, making the output of the pressure transducer of the present invention a highly accurate, highly sensitive indication of pressure sensed.