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| Number | Title | Issue Date |
| 4827265 | Cooperative tracking system A cooperative antenna tracking system for use at both ends of a radio link employs conical-scanning-type tracking at each end of the radio link to point a directional antenna guided by a continuous radio signal transmitted from an antenna at the other end... | 05/02/1989 |
| 4761308 | Process for the preparation of reflective pyrolytic graphite A process for preparing reflective pyrolytic graphite by the chemical vapor deposition of graphite on a suitable support from methane or other short chain hydrocarbons at a suitable pressure and temperature followed by annealing the pyrolytic graphite at ... | 08/02/1988 |
| 4721645 | Material for four directional reinforcement of conical shaped object, method for fabricating same and object formed therewith Radially extending fibers are disposed over a conical surface at predetermined sites. The sites correspond to vertices of a pattern of contiguous congruent isosceles triangles inscribed onto the surface of a sector of a circle which may be conformally map... | 01/26/1988 |
| 4666873 | Aluminum nitride-boron nitride composite article and method of making same A process for making a structural ceramic article, such as, an electromagnetic window, is disclosed, wherein the ceramic article is comprised of a densified mixture of not less than 50% by volume aluminum nitride and up to about 50% by volume boron nitrid... | 05/19/1987 |
| 4660096 | Dividing high-resolution-camera video signal response into sub-image blocks individually raster scanned A system for recording a high resolution still video image consists of a memory for storing the image. The memory is addressed so that portions of the high resolution image may be read out to form video sub-images corresponding to a conventional video for... | 04/21/1987 |
| 4655884 | Nickel plating of refractory metals An improved method of depositing nickel on a clean refractory metal surface to form a multilayer article is disclosed, wherein the full thickness of nickel can be plated prior to the intermetallic bonding of the metals. The metal surface is cleaned and et... | 04/07/1987 |
| 4644628 | Method of truss structure construction A truss structure for use in orbital systems and methods of constructing the same are disclosed. The structure is characterized by high stiffness and a precisely determined geometry and takes the form of an oblique triangular prism. The structure is const... | 02/24/1987 |
| 4633566 | Apparatus and method for constructing and disassembling a truss structure Apparatus and method for constructing and disassembling a triangular prism-form truss structure in spaced are disclosed. The apparatus includes a triangular prism-form construction fixture and three feed units disposed about the fixture for feeding the tr... | 01/06/1987 |
| 4635093 | Electrical connection An improved electrical connection between a leadless chip carrier and one or more circuits on a printed circuit board is disclosed. A solder fillet connects a metallization layer on the groove face of the carrier to the printed circuit. The solder fillet ... | 01/06/1987 |
| 4604494 | Photovoltaic cell array with light concentrating reflectors A photovoltaic array having light concentrating reflectors is disclosed which includes a plurality of mutually attached and substantially identical assemblies, each comprising a photovoltaic cell supported within a frame structure opposite a light-concent... | 08/05/1986 |
| 4601152 | Truss structure and method of construction A truss structure for use in orbital systems and methods of constructing the same are disclosed. The structure is characterized by high stiffness and a precisely determined geometry and takes the form of an oblique triangular prism. The structure is const... | 07/22/1986 |
| 4580922 | Vertex fittings derived from a master fitting A master fitting is disclosed adapted to be subdivided into a set of vertex fittings for use in a truss structure which comprises a plurality of frame elements. Interchangeable vertex fittings with accurately aligned surfaces, slots and holes are provided... | 04/08/1986 |
| 4576770 | Method of manufacturing a turbomachinery rotor A composite, single material, one-piece turbomachinery rotor constructed of fibers bonded in a matrix is disclosed together with a method of manufacture thereof.... | 03/18/1986 |
| 4575493 | Low expansion, multiband transmitting glasses and glass-ceramics Compositions of metal oxides which may be melted and cooled to produce glasses are disclosed. The glasses may be heat treated to produce glass-ceramics. The glasses have good transmittances for electromagnetic radiation in the ultraviolet, infrared and vi... | 03/11/1986 |
| 4575679 | Automatic load shed control for spacecraft power system An automatic load shed control for a spacecraft power system employs a selectable one of a plurality of charging gains to approximate a state of charge in a secondary battery system. An ampere hour meter is initialized when the battery system is known to ... | 03/11/1986 |
| 4544928 | Multifrequency reflector antenna A multifrequency antenna includes a main reflector for signals in a low frequency band. One or more portions of the main reflector are deformed to provide one or more auxiliary reflectors for signals in one or more higher frequency bands. The feed for the... | 10/01/1985 |
| 4525800 | Enhanced reliability data storage system with second memory for preserving time-dependent progressively updated data from destructive transient conditions A time delay memory system is used for enhancing the reliability of a data processing system or the like, wherein the critical information contents of temporary storage means are preserved from destruction by the adverse effects of an externally originate... | 06/25/1985 |
| 4518175 | Tubular assembly including insulated conduits and couplers for the transfer of high temperature and high pressure fluids A tubular pipe assembly for hot or cold fluid transfer which assembly includes a plurality of insulated conduit sections joined together, end to end, with male and female couplings. Each conduit section has concentric inner and outer pipes with insulation... | 05/21/1985 |
| 4467329 | Loaded waveguide lenses Waveguide lenses characterized by wide bandwidth, polarization-insensitivity, and absence of physical zoning steps. A waveguide lens constructed in accordance with the variable cut-off frequency approach of the invention comprises a two-dimensional array ... | 08/21/1984 |
| 4464097 | Turbomachinery rotor and method of manufacture A composite, single material, one-piece turbomachinery rotor constructed of fibers bonded in a matrix is disclosed together with a method of manufacture thereof.... | 08/07/1984 |
| 4451901 | High speed search system A system for searched digitized data permitting the simultaneous searching of several queries. To minimize excessive matches of queries, the search may be limited to selected portions of each of the documents being searched.... | 05/29/1984 |
| 4442165 | Low-density thermally insulating carbon-carbon syntactic foam composite A low-density, thermally insulating composite which is ablation resistant and impervious to gases and liquids. The composite is comprised of a carbon-carbon syntactic foam material which is covered and penetrated by pyrolytic carbon, in order to increase ... | 04/10/1984 |
| 4430803 | Circuit for levitated ball inclinometer An inclinometer has a ferromagnetic ball levitated between pairs of electromagnets. When the inclinometer changes attitude, the ball moves in response to the change in relative gravity direction. Alternating currents are applied to the proper electromagne... | 02/14/1984 |
| 4400825 | Adjustable slit radiographic apparatus A system is provided for facilitating the use of an in-motion slit radiographic technique to inspect 3-dimensional composite materials. The system includes a lead lined device that is adjustable to form various slit shaped and size openings. When used in ... | 08/23/1983 |
| 4399547 | Receiver of pulsed phase modulated signals A receiver of pulsed phase modulated signals is disclosed. These signals are produced by switching a reactance on and off a power line. The receiver produces a sinusoidal current in phase with the current on the power line and a sinusoidal voltage nominal... | 08/16/1983 |
| 4398200 | Feed apertures with crosspolarization compensation for linear polarization The crosspolarization components radiated by adjacent orthogonally linearly polarized feed horns of a reflector antenna system are compensated by structural modifications incorporated in the feed horns. In a first embodiment, the modified feed horns have ... | 08/09/1983 |
| 4390583 | Alumina-alumina composite Multifilament fibers of alumina are fabricated into a multi-directional preform which is densified through repeated infiltration with an aqueous solution of colloridal alumina, dried and fired.... | 06/28/1983 |
| 4168582 | Radar terrain signal simulator To simulate the radar return from terrain of particular generic type (e.g. desert, forest, cultivated land) it is a known suggestion to employ closed-loop shift register with feedback suitable to produce particular "texture" of return from specified terra... | 09/25/1979 |
| 4150568 | Apparatus and method for down hole vibration spectrum analysis An apparatus and a method are provided for detecting and measuring vibrations of a selected portion of a drill string in a bore hole. The vibrations are detected by a transducer which produces an electrical signal representative of the vibrations. The sig... | 04/24/1979 |
| 4136327 | Well survey system modulation technique A single pair of conductors in a drill cable in a borehole is used not only to transmit power into the hole, but to transmit control commands into the hole, and to communicate sensor data back up to the surface. A frequency for power and communication of ... | 01/23/1979 |
| 4130301 | Double-walled well casing structure A double-walled well casing for use in containing a fluid which is hotter than the ambient. The cavity between the double walls may contain insulation. Seals which maintain the inner and outer pipes in concentric relationship are designed to relieve the a... | 12/19/1978 |
| 4124019 | Tubular solar collector An evacuated, double-walled, tubular housing contains a sheet metal fin which is biased against the inner tube. A metal tube carrying the fluid to be heated is placed in heat transfer relationship with the fin. A plurality of collectors can be placed in a... | 11/07/1978 |
| 4117344 | Control system for a Rankine cycle power unit A vapor generator supplies vaporized motive fluid to a prime mover which drives a load. In the embodiment of this disclosure the primary load is the electrical load on an alternator. A sensor provides a continuous signal representative of the load. Respon... | 09/26/1978 |
| 4056946 | Low temperature cooler/condenser A bed of beads is placed in the path of the air flowing to the tubing of the condenser. Water is sprayed on the bed so that it will be evaporated and so cool the air below the dry bulb temperature.... | 11/08/1977 |
| 4025248 | Radially extended vapor inlet for a rotary multivaned expander The rotor of the expander has axially extending slots containing vanes which reciprocate generally radially as the rotor turns since the rotor is eccentrically mounted in a casing. Vapor distribution ports extend from the base of each slot to the surface ... | 05/24/1977 |
| 4010378 | Integrated electric generating and space conditioning system A vapor generator vaporizes a motive fluid which is used to drive a multivaned rotary expander. The expander is the prime mover for an electric generator which may be an alternator. Exhausted vapor from the expander (or if the expander is not being operat... | 03/01/1977 |
| 4008573 | Motive fluids for external combustion engines A motive fluid composed of ethyl alcohol, distilled water and one of several buffering agents such as pyridine is disclosed. The fluid is compatible with aluminum, ductile iron, and mild and carbon steels.... | 02/22/1977 |
| 3959767 | Data transmission system In one of the embodiments disclosed, apparatus is provided for communicating, in digital form, information from a plurality of analog sources located in a borehole to a location on the surface. A multiplexer is provided with a plurality of inputs for conn... | 05/25/1976 |
| 3938129 | Power line data transmission system A power line data transmission system is disclosed in which data is transmitted over a line carrying alternating current power by varying or modulating the power factor of the line or the phase angle of the power on the line in accordance with a signal to... | 02/10/1976 |
