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Martin Marietta Corporation Patents
Assignee:
Martin Marietta Corporation
Address:
Orlando, FL
No. of patents:
449
Patents:


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Patent Number Title Of Patent Date Issued
RE29991 Adaptable time division switch May 8, 1979
A switching network is disclosed that is capable of handling analog, PCM and CVSD signals connected to said network via loops or trunks. All signals are converted into CVSD format, synchronized to the network clocks, and switching is carried out on a time divided basis by shifting bi
RE29450 Machine operating condition monitoring system October 18, 1977
This invention relates to a system for monitoring the condition and operation of remotely located machines, such as coin-operated vending machines. In one embodiment, switches in each machine convert operating conditions into a binary digital word for that machine, which is stored te
6131022 Transceiver and antenna system for communication with remote station October 10, 2000
In one aspect of the present invention, a transceiver includes a pair of antennas with one of the receive channels including a predetermined phase shifter for shifting one of the received signals prior to combining the received electromagnetic energy to form a combined signal for process
6122405 Adaptive filter selection for optimal feature extraction September 19, 2000
A method for analyzing a region of interest in an original image to extract at least one robust feature, including the steps of passing signals representing the original image through a first filter to obtain signals representing a smoothed image, performing a profile analysis on the
5885911 Electromagnetic attenuating laminate and method for its formation March 23, 1999
An EMI shielding member and method of making the member. The member includes a non-metallic substrate having an electrically non-conductive coating of a dielectric polymer matrix material loaded with an EMI shieldingly effective amount of electrically conductive fibers. The member ca
5867073 Waveguide to transmission line transition February 2, 1999
A transition between a waveguide and transmission line is disclosed in which a probe portion of the transmission line extends into the waveguide to electrically field couple signals between the waveguide and transmission line. The transmission line is preferably a coplanar fuse and i
5853897 Substrate coated with highly diffusive metal surface layer December 29, 1998
A method is disclosed for the production of highly diffusive or absorptive metal surfaces. A dendritic crystal structure surface layer of metal is electrodeposited on a substrate, using a bipolar pulse plating technique. This metal surface layer may then be oxidized to provide a highly
5835901 Perceptive system including a neural network November 10, 1998
A real-time learning (RTL) neural network is capable of indicating when an input feature vector is novel with respect to feature vectors contained within its training data set, and is capable of learning to generate a correct response to a new data vector while maintaining correct respon
5828335 Spacecraft communication channel power control system October 27, 1998
A control system for the uplink transmitter of a ground station communicating with a spacecraft includes an antenna located at the ground station, pointed toward the spacecraft for receiving downlink signals transmitted therefrom. The received signals are accompanied by noise attribu
5825922 Methods and apparatus for centroid based object segmentation in object recognition-type image pr October 20, 1998
A digital signal processing system which uses an input image including a plurality of pixels to establish boundaries of objects in the input image. Each of the pixels has a gradient value and the object includes a centroid. Using a segmentation process, the digital signal processing
5817422 Optical apparatus having a highly diffusive metal surface layer October 6, 1998
A method is disclosed for the production of highly diffusive or absorptive metal surfaces. A dendritic crystal structure surface layer of metal is electrodeposited on a substrate, using a bipolar pulse plating technique. This metal surface layer may then be oxidized to provide a highly
5801970 Model-based feature tracking system September 1, 1998
Methods and apparatus providing model-based feature tracking for location assessment of a sensor platform, or tracking of a feature are disclosed wherein a series of predictive models are developed to predict a location of features in subsequently acquired sensor data. Feature location d
5776275 Fabrication of compact magnetic circulator components in microwave packages using high density i July 7, 1998
A magnetic circulator is incorporated into a multi-chip module using a microwave high density interconnect (HDI) structure. A prepackaged circulator can be inserted into a ready-made high density interconnected multi-chip module; this prepackaged circulator may use a stripline design
5770868 GaAs substrate with compositionally graded AlGaAsSb buffer for fabrication of high-indium fets June 23, 1998
Semiconductor devices made in highindium-content semiconductor material have advantageous properties, but similar substrate materials are hard to handle. A buffer layer makes a lattice-constant transition between a GaAs substrate and a high-indium epitaxially deposited semiconductor such
5757072 Structure for protecting air bridges on semiconductor chips from damage May 26, 1998
A protective cap is deposited over the top and sides of an air bridge structure located on an integrated circuit chip. The protective cap provides mechanical strength during the application of a high density interconnect structure over the chips, to prevent deformation of the sensiti
5745984 Method for making an electronic module May 5, 1998
A multi-chip module is provided which utilizes benzocyclobutene as a laminate adhesive for bonding the upper dielectric films in a high density interconnect structure. The benzocyclobutene thermosetting polymer is spin coated on a polyimide film, and baked at low temperature to remove an
5737458 Optical light pipe and microwave waveguide interconnects in multichip modules formed using adapt April 7, 1998
HDI fabrication techniques are employed to form a variety of optical waveguide structures in polymer materials. Adaptive optical connections are formed, taking into account the actual position and orientation of devices which may deviate from the ideal. Structures include solid light
5722232 Hybrid helium heater pressurization system and electrical ignition system for pressure-fed hybri March 3, 1998
A system for pressurizing a liquid oxygen tank (20) in a pressure-fed hybrid rocket (100) provides pressure at a first end of the tank (20) so that liquid oxygen can exit the second end. A hybrid heater (50) creates the pressure by mixing gaseous oxygen with the solid fuel (51) in the
5721019 Electromagnetic attenuating laminate and method for its formation February 24, 1998
An EMI shielding member and method of making the member. The member includes a non-metallic substrate having an electrically non-conductive coating of a dielectric polymer matrix material loaded with an EMI shieldingly effective amount of electrically conductive fibers. The member ca
5709138 Method and apparatus for precision cutting of fibers January 20, 1998
An apparatus for precision cutting of fiber tow is provided which includes a structure for securing a taut length of fiber tow between two points, a movable cutter, and a structure for guiding a cutting edge of the cutter substantially perpendicularly against the taut length of fiber tow
5703970 Method of and apparatus for improved image correlation December 30, 1997
A method of and apparatus for computing correlating images using the one dimensional Fast Fourier Transform (FFT) and the symmetry property of the Fourier Transform. In one aspect, the invention is a method of correlating images in the form of a pair of real number arrays. Apparatus for
5701010 Dual band polarity reversing multiplexer December 23, 1997
A detector array of a plurality of photodetector cells is provided which operates in two spectral bands by utilizing a polarity reversing multiplexer for directly reversing the polarity of different types of photodetector pairs. More particularly, long wave photoconductive quantum we
5699982 Spacecraft with heat dissipators mounted on thermally coupled shelves December 23, 1997
A spacecraft includes heat-radiating panels. Heat-generating boxes such as TWTs are mounted on shelves which are inside the spacecraft, where they cannot radiate to space. The shelves are coupled by bent heat pipes to the exterior radiating panels.
5687933 Attitude control for spacecraft with movable appendages such as solar panels November 18, 1997
A spacecraft includes a three-axis attitude control system. When velocity change thrusters are fired, their plumes impinge on a solar array, at angles which vary with the solar array position. This causes disturbance torques which vary with the solar array position. Disturbance torque
5678405 Continuously variable hydrostatic transmission October 21, 1997
A continuously variable hydrostatic transmission includes an input shaft connected to drive a hydraulic pump unit, a grounded hydraulic motor unit, and an output shaft. A wedge-shaped swashplate is pivotally mounted to the output shaft in driving connection to receive output torque resul
5668940 Method and apparatus for anti-aliasing polygon edges in a computer imaging system September 16, 1997
The final viewable color of each pixel to be displayed from video data signal output of a computer image generator, is found by: using input data signals setting display space coordinates of each vertex of each face polygon to be displayed, to generate a crossing location of each polygon
5668925 Low data rate speech encoder with mixed excitation September 16, 1997
A speech signal has its characteristics extracted and encoded (16), transmitted over a limited-data-rate path (18) and is decoded (20) and synthesized (22) at the receiving end. The characteristics include line spectral frequencies (LSF), pitch and jitter. The LSF are extracted by au
5668457 Variable-frequency AC induction motor controller September 16, 1997
A hydraulic pump (16) is driven by an induction motor (14) from a source of multiphase alternating current (10) of either fixed or variable frequency. The pressure is applied to a hydraulic load, which may vary, and change the pressure. A pressure sensor coupled to the pump produces pres
5663825 Stabilized step/stare scanning device September 2, 1997
A method and apparatus for holding a line of sight in a scanning imaging system wherein there is continuous relative movement between the field of view of the system and an image plane. A descan mechanism temporarily holds a line of sight within a field of regard as a scanning mechanism
5663523 Method of propelling a projectile with ammonium azide September 2, 1997
A propellant composition comprising an admixture of a first hydrogen rich material and a second metal material which is capable of reacting exothermically with the first material. The ratio of the first material to the second material is selected such that the exothermic reaction forms a
5661484 Multi-fiber species artificial dielectric radar absorbing material and method for producing same August 26, 1997
In a radar absorbing material, first or relatively resistive fibers are combined with second or relatively conductive fibers in a dielectric binder. Preferably, the first fibers are graphite filaments and the second fibers are metal coated graphite filaments. The appropriate selection of
5653841 Fabrication of compact magnetic circulator components in microwave packages using high density i August 5, 1997
A magnetic circulator is incorporated into a multi-chip module using a microwave high density interconnect (HDI) structure. A prepackaged circulator can be inserted into a ready-made high density interconnected multi-chip module; this prepackaged circulator may use a stripline design
5652912 Versatile memory controller chip for concurrent input/output operations July 29, 1997
A memory controller includes an input data path and an output data path. First circuitry generates signals to put the input data into at least one variably-dimensioned logical array of memory cells of a memory. Second circuitry generates signals to extract from the memory the contents of
5650585 Ignitor for use in a liquid monopropellant gas generator July 22, 1997
An initiator, for use in a gas generator, includes an enclosed volume in communication with apertures for introducing liquid propellant and pre-pressurization gas into a propellant ignition chamber, and an aperture for introducing combusted gasses into a gas generator. A mechanism for
5648052 Liquid monopropellant gas generator July 15, 1997
A continuous flow-rate gas generator fueled by liquid mono-propellant includes a propellant storage tank, a motor-driven pump (or other pressurization technique) to force the propellant into a combustion chamber having an enclosed volume, an injector to effectively break up the incom
5647573 High pressure fluid valve assembly July 15, 1997
To resist mechanical forces tending to unseat a fluid valve applied to seal against a high fluid pressure, a fluid valve assembly is equipped with a valve block that, in response to the high fluid pressure, causes a locking member to be forcibly wedged into clamping engagement with the s
5642617 Continuously variable hydrostatic transmission with neutral-setting hydraulic circuit July 1, 1997
A continuously variable hydrostatic transmission includes axially aligned input and output shafts journaled by a transmission housing and respectively coupled to a prime mover and a load. The input shaft drives a hydraulic pump unit, while a hydraulic motor unit is grounded to the tr
5636165 Apparatus for and method of facilitating proper data transfer between two or more digital memory June 3, 1997
An apparatus for and method of ensuring proper transfer of data between two registers. A device driver utilizes a clock signal as an enable input before data is transferred from one register to another. This prevents a misregistration of data when delays in propagation of the clock signa
5631436 Gun equipped with down-bore liquid propellant booster stage to increase projectile muzzle veloci May 20, 1997
A booster stage is positioned down-bore from the breech of a gun to contain a charge of liquid propellant that is ignited by the combustion gases of a detonated breech propellant charge trailing the projectile down the gun bore. The detonated liquid propellant increases the bore gas pres
5629522 Apparatus for and method of providing long integration times in an IR detector May 13, 1997
Apparatus for and method of increasing the effective integration time, and, hence, reducing the noise bandwidth of a photodetector. The current output of the photodetector is converted to a voltage signal in a low pass filter. The low pass filter is preferably implemented as a switched
5608400 Selectable intermediate frequency sigma-delta analog-to-digital converter March 4, 1997
A sigma-delta analog-to-digital converter (10) provides high loop gain for suppression of noise components by use of a regenerative feedback loop or resonator (50), which produces a comb resonance response 212), embedded in the main degenerative feedback loop (48). The main loop includes
5606707 Real-time image processor February 25, 1997
A real-time image processor has three functional sections: an image manager, an image processor, and an instruction generator. The image processor may be an array of single-instruction multiple-data (SIMD) processing elements, for processing a subframe of sensor data. The instruction
5604822 Methods and apparatus for centroid based object segmentation in object recognition-type image pr February 18, 1997
A digital signal processing system which uses an input image including a plurality of pixels to establish boundaries of objects in the input image. Each of the pixels has a gradient value and the object includes a centroid. Using a segmentation process, the digital signal processing
5600788 Digital test and maintenance architecture February 4, 1997
A testing device has an architecture including a board test interface for coupling to test points on a circuit board; a programmable processor, coupled to the board test interface, for controlling a test of the circuit board via the board test interface; and a first communications interf
5594194 Dual-axis ammunition reorienter January 14, 1997
An ammunition round reorienter is equipped with a gear train having parallel drive paths connecting a common motor to concurrently rotate a platform about a vertical axis and to pivot a tray about a horizontal axis, such that an ammunition round carried by the tray is reoriented both
5594192 Active ammunition magazine with improved chain conveyor January 14, 1997
A compact ammunition magazine of high storage density contains an endless ammunition conveyor running in a serpentine path. The conveyor includes a succession of units consisting of a pair of rigidly connected tubes that receive ammunition rounds in snug-fitting relation. The tube units
5592441 High-gain directional transducer array January 7, 1997
A transducer array according to the invention includes forty-two acoustic transducers for use in a fluid medium, with each of the transducers having maximum lateral dimensions of less than one acoustic wavelength in the medium, whereby the transducers themselves tend to radiate isotropic
5592021 Clamp for securing a power device to a heatsink January 7, 1997
A clamping system is provided for effectively securing at least one power device in a thermally-conductive and electrically-insulative manner to a heatsink with a clamp member having an elongated member portion adapted to bear against a device, and a second member portion having an end a
5586579 Combination ball valve and pressure relief valve assembly December 24, 1996
To provide pressure relief in a fluid line of a fluidic circuit, the ball element of a shutoff valve incorporates a tube that is aligned with a pair of valve ports when the ball is in the closed valve position. A miniature check valve, positioned in the tube, operates, depending on its
5583507 Passive identification of friend vs. foe apparatus and method December 10, 1996
A method and apparatus for passive identification includes a series of elements preferably in the form of strips, bars or other geometric shapes, or as dipole antennas made of a material having variable EM retro-reflectivity characteristics. By varying the characteristics of individu
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