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| Number | Title | Issue Date |
| 4644360 | Microstrip space duplexed antenna Separate receive and transmit interleaved arrays are distributed throughout a defined area. Each array is interconnected, at opposite ends thereof, to a feed line so that the receive and transmit antennas are each associated with four beams. Feed through ... | 02/17/1987 |
| 4639231 | Retainer for electrically fired getter Apparatus is disclosed for retaining an electrically fired getter inside a ring laser gyroscope. A groove is formed in a plate, which is hermetically sealed to a hole in the ring laser gyroscope block. The cylindrically shaped getter is placed longitudina... | 01/27/1987 |
| 4583162 | Look ahead memory interface A memory access system for a computer is improved by combining look ahead techniques with a partitioned memory. A parallel system operating in reciprocal fashion accesses from one portion while the other portion is generating the next predicted address. T... | 04/15/1986 |
| 4583079 | Multiplexed tracking converter Multiple input channels, containing servo angle data, undergo analog multiplexing by a single non-linear ladder and switch network which generates a steering voltage on a channel-by-channel basis. The steering voltage undergoes demodulation and digitizati... | 04/15/1986 |
| 4536064 | Clear view screen In a clear viewing screen of the kind comprising a fixed screen element; a disk-like screen element supported for rotation at the outside of the window; a motor for driving the rotatable disk-like screen element supported at the inside of the fixed screen... | 08/20/1985 |
| 4503543 | Ring laser gyroscope getter-holder A resilient serpentine shaped tungsten wire is formed to match a short wire section to hold a ring laser gyroscope getter. The getter-holder assembly is positioned within a stepped oblong bore so that the getter is in firm contact with the bore surface at... | 03/05/1985 |
| 4493997 | Fiber optic sensor for shaft state A shaft state sensor includes a rotating member having a miniaturized lamp mounted thereto. A rotary transformer is connected to the lamp and supplies it with power. A number of optic fibers are arranged in a circular configuration on a stationary member ... | 01/15/1985 |
| 4486845 | Resolver to incremental shaft encoder converter A circuit for duplicating the function of an incremental shaft encoder comprises a rugged resolver connected to a hybrid digital-analog circuit which generates output signals identical to those of a counterpart incremental encoder. The digital portion of ... | 12/04/1984 |
| 4477188 | Monolithic three axis ring laser gyroscope A monolithic ring laser gyroscope is formed by six mirrors mounted to the respective center of each face in a cube. Bores in the cube interconnect each of the mirrors. Three orthogonal planes are defined within the cube, each of which contains a laser cav... | 10/16/1984 |
| 4473297 | Ring laser gyroscope utilizing phase detector for minimizing beam lock-in Two of the three reflecting mirrors in a ring laser gyroscope are provided with transducers permitting the mirrors to control the ring laser gyroscope laser path. The third mirror is partially reflecting to permit some cavity radiation to exit. The radiat... | 09/25/1984 |
| 4464942 | Gyroscope hinge assembly with adjustable axial compliance A universal joint hinge assembly for a tuned rotor gyroscope is insensitive to restraint changes due to spin axes accelerations. The hinge assembly is readily trimmable at the gyroscope wheel assembly to permit adjusting of the axial compliance of the gyr... | 08/14/1984 |
| 4452342 | Shaft braking mechanism utilizing non-permanent deforming brake shoe A braking mechanism for a rotating shaft includes a corrugated wheel keyed to the shaft. A polyurethane pad mounted on a spring-biased plunger contacts the wheel corrugations creating non-permanent mating formations in the pad. Thus, upon contact between ... | 06/05/1984 |
| 4446394 | Linearizing mechanism for a vibrating beam force transducer A single beam force transducer is provided with integrally affixed isolation springs which are axially compliant and unbalanced in their spring rates so as to induce beam bending due to applied tension and compression. The amount of bending introduced due... | 05/01/1984 |
| 4445065 | Non-prismal beam resonator A single beam force transducer has a beam characterized by a thickened central portion and tapered outward portions. The support members of the transducer are thickened and are thus stiffer while the isolator masses are shortened. These critical configura... | 04/24/1984 |
| 4444502 | Ring laser gyroscope with fiber optic beam combiner An electromechanically dithered ring laser gyroscope includes a beam combiner utilizing optical fibers instead of conventional optics. This permits a beam measuring photodetector and associated electronics to be positioned outside the gyroscope or its enc... | 04/24/1984 |
| 4436423 | Ring laser gyroscope suspension A torsional hinge is axially mounted within a central bore of a ring laser gyroscope body. The hinge comprises a plurality of angularly spaced wing sections having generally radially extending slits therein for permitting torsional motion of the gyroscope... | 03/13/1984 |
| 4435757 | Clock control for digital computer A master clock for a microprogrammed digital computer generates output pulses whose separation in time can be varied in response to each microinstruction or to a process-related signal. The output pulses are formed from basic time units from a clock gener... | 03/06/1984 |
| 4433260 | Hysteresis synchronous motor utilizing polarized rotor A hysteresis synchronous motor in which a rotor includes arcuate permanent magnets mounted adjacent to the hysteresis ring material. Permanent magnetic poles are induced in the ring material by the rotating electromagnetic stator field. After start-up, th... | 02/21/1984 |
| 4431947 | Controlled light source A feedback control system for maintaining the intensity and spectral distribution of light at a predetermined level at a wavelength characteristic of the excited source. Control of that intensity, which exhibits a systematic but not necessarily a monotoni... | 02/14/1984 |
| 4410276 | Ring laser gyroscope with doppler mirrors A ring laser gyroscope has at least two of its mirrors vibrated perpendicular to their reflective surfaces by equal and opposite amounts to maintain the total beam path length constant. The amplitude of vibration causes the beams to be shifted across surf... | 10/18/1983 |
| 4410274 | Ring laser gyroscope with doppler mirrors and offset actuators An equilateral triangular ring laser gyroscope contains drivers to vibrate two of the mirrors synchronously and oppositely along paths displaced by about 4.27° from the bisector of the vertex angles at which those mirrors are located. The magnitude of di... | 10/18/1983 |
| 4371803 | Commutator brush holder quadrature spring A commutator brush holder mounts a pair of tension band springs in quadrature relation. Both springs contact the brush end remote from the commutator and urge the brush into contact with the commutator, with constant force. The quadrature springs promote ... | 02/01/1983 |
| 4370642 | Single non-linear converter ladder network having analog switches with digital control An improved ladder network for use in a converter utilizing a single ladder network with single pole double throw switches to simultaneously implement nonlinear sine and cosine functions.... | 01/25/1983 |
| 4358839 | Absolute digital clock system An absolute digital clock system which is capable of counting absolute time despite the disruptive effects of a nuclear event, or other disturbance, on the electronic circuitry of the system. The clock system of the invention includes a master quartz crys... | 11/09/1982 |
| 4279465 | Device for transmitting and receiving optical data on the same optical transmission line An optical device for the simultaneous transmission and reception of optical data on the same optical waveguide. A transmission and receiving means at each end of the fiber optic cable permits simultaneous transmission. Each transmit/receive means compris... | 07/21/1981 |
| 4266432 | Gyro motor control In order to eliminate the day-to-day gyro drift phenomena which result from interaction of the magnetic pole position of the synchronous motor typically used to drive the gyro and the gyro wheel, an induction motor controlled by a phase locked loop refere... | 05/12/1981 |
| 4245498 | Well surveying instrument sensor A surveying instrument sensor which includes a gimbal supported for rotation within a casing, a torquer coupled to rotate the gimbal with a first two-axis flexure suspended gyro supported on the gimbal with its spin axis perpendicular to the axis of the g... | 01/20/1981 |
| 4243976 | Ternary to binary converter A device for converting ternary-coded electrical pulse trains into binary-coded pulse trains, by interrupting a binary zero-rate data stream, representing one ternary condition, to supply an output voltage or no output voltage, representing the other tern... | 01/06/1981 |
| 4231023 | Binary to ternary converter A circuit for converting serial binary coded ternary information received on one line into ternary signals for transmission on two lines. The presence or absence of a pulse in a first interval is compared with the presence or absence of a pulse in the suc... | 10/28/1980 |
| 4227158 | Multifrequency control from a single crystal A piezo-electric crystal vibrating in several modes controls several frequencies generated by voltage controlled oscillators simultaneously. The output of each voltage controlled oscillator is fed to a summing amplifier which drives the crystal. The outpu... | 10/07/1980 |
| 4221131 | Vibrating beam accelerometer A vibrating beam accelerometer is provided which includes a quartz vibrating beam resonator as aa force transducer, and which also includes resiliently biased relief arms which release the quartz beam should the acceleration forces become excessive. The r... | 09/09/1980 |
| 4213343 | Kinematic inertial sensor A kinematic inertial sensor is provided for measuring angular velocity and position relative to inertial space about one or more measurement axes. The kinematic inertial sensor includes an angular rate sensor having a ring of conducting fluid contained in... | 07/22/1980 |
| 4207668 | Method of manufacturing a flexure suspension assembly A method of manufacturing a flexure suspension assembly which includes forming four quadrantally and radially disposed single axis flexure joints in a first cylindrical member and four quadrantally and radially disposed single axis flexure joints in a sec... | 06/17/1980 |
| 4202089 | Splat-cooled instrument flexure and method to fabricate same A machine for manufacturing high strength flexure hinges having use in accelerometers. A source of metal material is splat-cooled after it has been heated to a molten state. An induction heater heats the metal material to the molten state and the molten m... | 05/13/1980 |
| 4196397 | Synchro power buffer amplifier A synchro buffer amplifier is provided which uses two matched amplifiers respectively connected to the primary windings of two transformers. Two input leads are respectively connected to the inputs of the two amplifiers and a third input lead is grounded.... | 04/01/1980 |
| 4189946 | Three axis gyro In a gyroscope including a rotor spinning about a spin axis, the rotor gimballed about two mutually perpendicular axes and including cross coupled closed loops operative on the two mutually perpendicular axes so as to be able to detect rates about said tw... | 02/26/1980 |
| 4189947 | Nutation damper for two-axis gyroscope An electrical circuit interposed between the pickoffs and torquers of a two-axis gyroscope. The circuit output controls the torquers. When the pickoff signals vary at the nutation frequency, the angular accelerations produced by the torquers damp the nuta... | 02/26/1980 |
| 4190364 | Ring laser gyroscope The invention is concerned with angular rate sensors, and particularly with ring laser gyroscopes which includes means for compensating for the effects of temperature gradients and residual lock-in. A ring laser gyroscope is provided which has a triangula... | 02/26/1980 |
| 4187422 | Internal reference for stellar tracker A self-calibrating star tracker in which a light signal source located on the detector is reflected into the optics and redirected from the optics back onto the detector. In this manner, movement of the detector or optics from a known position can be sens... | 02/05/1980 |
| 4186422 | Modular electronic system with cooling means and stackable electronic circuit unit therefor A modular electronic system having cooling means has a plurality of stacked electronic circuit units. Each stackable circuit unit has a rectangular frame having a pair of end members which support a plurality of spaced-apart, cooling channels. A cooling p... | 01/29/1980 |
