Patents Represented by Attorney Howard P. Terry
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Patent number: 4450544Abstract: The acoustical energy absorbing baffle has a pair of restricted orifice screens rigidly secured in parallel, spaced relation by a lattice stiffener. The screen-stiffener assembly is immersed in a viscous fluid contained within a tank sealed with an elastic diaphragm. Incident acoustical energy is transmitted through the diaphragm and translated into energy absorbing motion of the fluid through the restrictive screens. A compliant mass is acoustically coupled to the fluid to augment fluid particle velocity through the screens and to further absorb energy.Type: GrantFiled: November 16, 1981Date of Patent: May 22, 1984Assignee: Sperry CorporationInventors: Alfred Denaro, George Rand
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Patent number: 4448022Abstract: In a geothermal energy conversion system having a boiler and a turbine driven pumping unit, a separator is disposed between the boiler and the turbine driven pump for separating entrained liquid droplets from the vaporized working fluid exhausted from the boiler.Type: GrantFiled: June 18, 1981Date of Patent: May 15, 1984Assignee: Sperry CorporationInventor: Andrej M. R. Aplenc
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Patent number: 4443799Abstract: A spread spectrum radar apparatus wherein a plurality of carrier signals frequency modulated over predetermined time intervals and separated in frequency such that the spectra of the signals do not overlap are sequentially transmitted. Radar returns of this transmission sequence are coupled to a receiver which is frequency band activated in accordance with the transmission sequence and in a manner to minimize radar minimum detection range. Each radar echo is processed through a matched filter for pulse compression, delayed in accordance with the position of its transmitted signal, detected, and non-coherently summed with detections of returns from the same target of other interval transmissions.Type: GrantFiled: July 2, 1981Date of Patent: April 17, 1984Assignee: Sperry CorporationInventor: William L. Rubin
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Patent number: 4442474Abstract: In a capacitive pressure transducer of the type having a flexible diaphragm, a "dimple" like or concave surface is formed therein in order to provide an air gap between the flexible diaphragm and a relatively rigid plate. When pressure is applied to the diaphragm, the diaphragm deflects providing a measurable change in capacitance which varies as a function of the applied pressure.Type: GrantFiled: December 14, 1981Date of Patent: April 10, 1984Assignee: Sperry CorporationInventors: Joannes N. M. de Jong, Richard L. Earle
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Patent number: 4442362Abstract: A baseband generator for pulses of high peak amplitude, rapid rise time, subnanosecond duration, and high pulse repetition frequency is disclosed. A plurality of capacitors are charged in parallel then discharged in series to cause a plurality of avalanche of transistors to fire sequentially. The resulting sum voltage across the capacitors is then applied to a step recovery diode to generate the pulse.Type: GrantFiled: May 17, 1982Date of Patent: April 10, 1984Assignee: Sperry CorporationInventor: Basrur R. Rao
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Patent number: 4438655Abstract: The invention is a suspension system for a two-degree-of freedom flexure-suspended free-rotor gyroscope and a miniature gyroscope incorporating such a flexure system. An axial strut suspension device for controlling the axial position of the rotor includes a series of thin, flat sections, while the radial suspension function is performed by a cross-shaped element of very thin metal, one pair of the diametrically opposed cross ends thereof being affixed to the rotor-driving shaft, while the other pair of opposed cross ends thereof is affixed to the gyroscope rotor.Type: GrantFiled: November 15, 1976Date of Patent: March 27, 1984Assignee: Sperry CorporationInventor: Thomas R. Quermann
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Patent number: 4437351Abstract: In combination with a control stick having a grip handle, a control stick force transducer includes a flexure means having a pair of parallel plates, one secured to the grip handle and one secured to the control stick and at least three compliant columns interconnecting said plates and forming at least three parallelograms disposed in vertical planes so that the one plate deflects relative to the other in accordance with rectilinear forces applied thereto but is insensitive to any moments applied thereto through the control handle. The force transducer further includes inductive pick-off means designed to be insensitive to moments applied to the handle about its vertical axis and a suspended mass and lever means pivoted relative to said columns so as to produce equal and opposite forces on the grip handle to compensate for the acceleration forces acting thereon.Type: GrantFiled: April 13, 1981Date of Patent: March 20, 1984Assignee: Sperry CorporationInventors: Harold J. McGrann, John F. Orn, Matthew C. Pallaver
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Patent number: 4437761Abstract: An optical temperature sensor and method of manufacture therefor in which the intensity of light reflected from a first dielectric interface or from first and second dielectric interfaces, wherein one of the dielectrics has a temperature dependent index of refraction is measured. The intensity of light refleted from such dielectric interfaces will vary depending on the index of refraction which in turn is temperature dependent, thus providing a temperature dependent light signal.Type: GrantFiled: March 27, 1981Date of Patent: March 20, 1984Assignee: Sperry CorporationInventors: Harry Kroger, Richard A. Soref
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Patent number: 4436584Abstract: A method for dry anisotropic etching of semiconductor material by a reactive gas infused in the presence of a low-pressure plasma discharge uses a photoresist mask superposed on a semiconductive film with the slope of the photoresist edges defined within a critical angular range to allow selective formation of a protective polymer film which prevents lateral etching of the edges of the photoresist and sidewalls of the film, while not inhibiting vertical etching, thereby allowing precision definition of the etched pattern. A novel technique to determine the conditions of the photoresist sidewall geometry necessary for polymer film formation and predictable etching behavior encapsulates the film in a thick layer of photoresist, which after cleaving the structure permits selectively etching the photoresist to expose and retain the polymer film without deformation.Type: GrantFiled: March 21, 1983Date of Patent: March 13, 1984Assignee: Sperry CorporationInventors: Stephen E. Bernacki, Bernard B. Kosicki
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Patent number: 4435707Abstract: A weather radar incorporating a sensitivity time control modifying circuit for adaptively increasing the gain of the IF amplifier as a function of precipitation rate; thereby increasing the range of the radar through the precipitation and identifying on the display those regions in which the radar might otherwise inaccurately indicate the precipitation rate. Reflections from the precipitation are received by the radar antenna coupled to a mixer wherefrom an IF signal is coupled to the IF amplifier wherein it is amplified in accordance with a gain that is determined by the modified sensitivity time control signal.Type: GrantFiled: March 9, 1981Date of Patent: March 6, 1984Assignee: Sperry CorporationInventor: John F. Clark
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Patent number: 4434391Abstract: A display pointer is driven back and forth along a predetermined path by a geared-down miniature d.c. servomotor in accordance with a command signal. The path is determined by an elongated printed circuit board base having closely adjacent, elongated, coextensive triangularly shaped plates thereon, constituting stationary capacitor plates of a pair of variable capacitors. The printed circuit board includes a dielectric material which also overlays the triangular plates. A relatively narrow, electrically conductive slider member extends laterally across the triangular plates and is supported by and rides on the printed circuit board and constitutes a common movable capacitor plate for the variable capacitors. The display pointer is attached to and positioned by the slider. The slider in turn is displaced along the printed circuit board by means of a cable and pulley mechanism coupled to the servomotor.Type: GrantFiled: January 15, 1982Date of Patent: February 28, 1984Assignee: Sperry CorporationInventors: Harold L. Swartz, Randal A. Atkeisson, Rodney A. Carter, Russell C. Parker
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Patent number: 4433422Abstract: An apparatus and method for measuring the average or carrier frequency of a frequency shift keyed (FSK) signal which consists of sinusoidal tones that alternate regularly in frequency at a known rate between two unknown frequencies separated by a known frequency shift. The incoming signal is multiplied by two delayed versions of itself to yield to product signals. The delay employed in the first version is nominally equal to the FSK shift rate and the second delay differs from the first by an incremental amount. The two product signals are passed through substantially identical bandpass filters centered at the shift frequency and having a bandwidth approximately equal to the shift rate, and the phase angles of the filtered signals are differentially compared and averaged to produce a signal proportional to the average frequency of the FSK signal.Type: GrantFiled: March 29, 1982Date of Patent: February 21, 1984Assignee: Sperry CorporationInventor: Richard R. Kurth
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Patent number: 4432599Abstract: An optical differential sensor utilizes at least two optical waveguides to receive light directly from another waveguide or reflected from a mirror to sense the position of the waveguide or reflector relative to the position of at least two waveguides. Relative positions may be influenced by ambient conditions or from mechanical motions, thus affecting an environmental or metrical sensor.Type: GrantFiled: March 27, 1981Date of Patent: February 21, 1984Assignee: Sperry CorporationInventor: Donald H. McMahon
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Patent number: 4430640Abstract: A step data to synchro converter for coupling one of a plurality of different step data transmitters to one of a plurality of different synchro receivers. The output of the step data transmitter is applied to an interface circuit and processed into a three bit binary code suitable for actuating a plurality of switching means. The switching means selectively apply an in-phase and an out-of-phase output of a transformer, which is responsive to the synchro receiver's reference voltage and frequency source, to a plurality of transformers associated with the input stator windings of the synchro receiver. The output of the plurality of transformers is a drive signal which satisfactorily approximates synchro data.Type: GrantFiled: January 29, 1981Date of Patent: February 7, 1984Assignee: Sperry CorporationInventors: James E. Hermansdorfer, William T. Spurgin
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Patent number: 4430691Abstract: In a flight instrument having indicator assembly and heat generating electronics assembly, integral and thermally conductive structural supports are provided for each assembly. The assemblies are fastened together with shouldered screws such that there is some relative movement between the assemblies. The fastened assemblies are enclosed in a one piece housing, and the relationship between the structural supports and the housing facilitates heat transfer from the instrument.Type: GrantFiled: February 23, 1981Date of Patent: February 7, 1984Assignee: Sperry CorporationInventor: Clyde M. Rea
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Patent number: 4430662Abstract: Josephson junction integrated circuits of the current injection type and magnetically controlled type utilize a superconductive layer that forms both Josephson junction electrode for the Josephson junction devices on the integrated circuit as well as a ground plane for the integrated circuit. Large area Josephson junctions are utilized for effecting contact to lower superconductive layers and islands are formed in superconductive layers to provide isolation between the groundplane function and the Josephson junction electrode function as well as to effect crossovers. A superconductor-barrier-superconductor trilayer patterned by local anodization is also utilized with additional layers formed thereover. Methods of manufacturing the embodiments of the invention are disclosed.Type: GrantFiled: April 9, 1981Date of Patent: February 7, 1984Assignee: Sperry CorporationInventors: Don W. Jillie, Jr., Lawrence N. Smith
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Patent number: 4426849Abstract: In a gravity head geothermal energy conversion system, downwardly flowing working fluid is supplied to a downwell turbine pump in heat transfer relationship to the upwardly flowing geothermal brine. The working fluid which is used to drive the downwell turbine pump is reheated by conveying the working fluid upward in heat transfer relationship with the geothermal brine to a predetermined point.Type: GrantFiled: March 25, 1981Date of Patent: January 24, 1984Assignee: Sperry CorporationInventor: Hugh B. Matthews
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Patent number: 4426767Abstract: A method of fabricating gallium arsenide circuits or devices in which source and drain contact areas are deposited using vapor phase epitaxy techniques through holes in a refractory mask. Selected areas of a refractory mask are etched away to expose a region of active gallium arsenide material in which holes are formed by a chemical or plasma etch. These holes are then filled with highly doped vapor phase epitaxially grown gallium arsenide to provide drain and source contact regions. In further steps additional regions of the refractory mask are etched away to define gate regions. Metallization and lift-off may then occur in a single step to provide contacts to gate, drain and source regions and a planar surface for further device processing.Type: GrantFiled: January 11, 1982Date of Patent: January 24, 1984Assignee: Sperry CororationInventors: Alan W. Swanson, Charles R. Snider, Frank H. Spooner
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Patent number: 4426623Abstract: A pulse sample demodulator which has a first sample and hold circuit detects the peak amplitude of the time varying waveform during a short sampling interval. The first sample and hold circuit is triggered by narrow pulses produced by a circuit responsive to the occurrence of each peak in the time varying waveform. A second sample and hold circuit, sampling during an interval not coincident with the first sampling interval, receives the information stored in the first sample and hold circuit; but sampling at a different interval, it does not receive the time varying signal applied to the first sample and hold circuit, which would otherwise appear as ripple in the output of the demodulator.Type: GrantFiled: July 2, 1981Date of Patent: January 17, 1984Assignee: Sperry CorporationInventors: Dean R. Wilkens, Dan B. Harned, Norman W. Hawn
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Patent number: D272608Type: GrantFiled: October 30, 1981Date of Patent: February 14, 1984Assignee: Sperry CorporationInventors: Charles R. Wesner, Gregory Schluge
