Abstract: A locked frequency divider, multiplier and phase shifter includes a circuitry for controlling the operation of a timer with timing circuitry to operate in an astable mode so that the timer can function as a frequency divider, multiplier or phase shifter.

Abstract: Modular structures for the collection, concentration and conversion of solar energy to another usable form such as electrical energy. The structures feature three conic section reflective surfaces, two of which focus in front of a receiver element and off the axis of the structure. The third reflective surface is utilized to redirect that energy which would otherwise miss the receiver element to improve overall efficiency.

Abstract: An insulated gate field effect transistor (IGFET) memory or logic circuit is implemented at higher density levels by employing thick oxide IGFET's as load elements. Additionally, the gate electrode structure of the IGFET load devices and their channel lengths with respect to the channel length of parasitic IGFET devices are selectively controlled in order to insure that the parasitic devices remain nonconductive.

Abstract: An on board system for determination of slant range to a ground impact point of a ballistic vehicle. The system utilizes two infrared sensors viewing the ground at a very small divergent angle with respect to each other. The off axis displacement angle is small enough to enable viewing of infrared landmarks at low approach angles. The system utilizes a correlator to measure time delay between successive sensings of ground landmarks and slant range is computed without necessity of knowledge of any of the angles involved.

Abstract: An improvement in a pulsed radar system providing coherent-on-receive signals utilizing digital techniques. The phase of the transmitted signal is compared to the phase of a stable local oscillator and the phase relationship is converted to a complex digital number which is then stored in a suitable short term memory. The received signals are also converted to complex digital numbers containing both the phase relationship to the stable local oscillator and the amplitude of the return video signal. The digitized received signals are then digitally phase corrected to provide coherence using the stored complex digital numbers for the correction.

Abstract: A high power output push-pull microwave oscillator utilizing a plurality of tuned coaxial circuits each mounting a diode at each of two extremities and each being coupled to an output cavity of resonant frequency, f.sub.o, equal to the operating frequency. An equal plurality of second cavities, also resonant at f.sub.o are coupled to bias lines one-fourth wavelength from each of the plurality of tuned coaxial circuits to reflect a short circuit across a tee junction built into the center conductor of each coaxial circuit at the resonant frequency, f.sub.o, when the diodes are in a push-pull or out-of-phase operating mode. The short circuit is removed when the diodes operate in an in-phase mode and the resultant losses effectively suppress the in-phase mode of operation.

Abstract: An accumulating cavity microwave oscillator having a plurality of coaxial circuit mounted negative resistance diodes coupled to the cavity wherein the plurality of coaxial circuits may be mounted in concentric circles or in other symmetrical or non-symmetrical configurations and one or more coupling mechanism outputs may be utilized. No output is required to be located at the center of either the accumulator or the auxiliary cavity thereby allowing cavity tuners to be mounted there. The coupling coefficient in the coaxial circuits is equal to one plus the coupling coefficient of the output probes in order to present a relatively constant load to the diodes over the operating frequency range, thereby maximizing the usable operating frequency range.

Abstract: A platform stabilization system utilizing a small free running gyro, gimballed to the platform, as the reference element. Optical means are used to generate error signals in a torque free subsystem for sensing misalignment between the reference gyro and the platform. A system of magnetic rods and surrounding electrical solenoid coils are used to initially position the reference gyro. The reference gyro to platform gimbals are located within the structure of a second gimbal system mounting the platform to a pedestal mount. The close spacing of the axes from the platform yields a minimum swept volume of the pedestal in operation. Torque motors located in the pedestal are coupled to the platform gimbal by means of flexible cables. The motors are controlled by amplified signals from the optical error sensor signals. The result of this design is an extremely compact, high speed, low mass, low cost, stabilized platform system.

Abstract: A combination of large scale integrated digital circuits for providing universally selectable decoding, encoding and over-interrogation control functions in a radar transponder. The circuits are implemented in semiconductor chip and hybrid circuit form and selection of desired functions may be accomplished by external switches, by jumper wiring or by custom designed printed circuit boards.The use of large scale integrated circuit techniques allows facilitation of multiple control functions without necessity of bulky assemblies or high power consumption.

Abstract: A communications system utilizing a noisy reference signal and a noisy information signal wherein the information signal is delayed from the reference signal as a function of the information modulation and then the two signals are combined for simultaneous transmission. The receiver amplifies the combined signal and delays it by a predetermined amount corresponding to the delay in the transmitter. The delayed and undelayed signals are autocorrelated to reconstruct the information signal. The system provides for autocorrelation of signals which have traveled a plurality of signal paths from transmitter to receiver.

Abstract: A system for measuring the minimum miss distance and direction in three planes of a missile trajectory with respect to a target. Space diverse sequential range measurements are made from a plurality of pulse radar sensors mounted on the target. The range measurements are position identified in pairs of data transmitted to a data processor. The data processor adds time data and utilizes a nonlinear conjugate directions algorithm to solve for the minimum miss distance vector with a high degree of accuracy in a relatively short time period.

Abstract: A vibration damping system for a printed circuit board in which laminated damping elements are remotely positioned from the printed circuit board.The laminated damping elements are connected to the printed circuit board by post structural means fastened rigidly at each end to the printed circuit board and to the laminated damping element, respectively, for the purpose of transferring vibration energy from the printed circuit board to the damping element. The laminated damping elements comprise a high hysteresis bonding agent for bonding the laminate and for absorbing the vibration energy. The high hysteresis bonding agent is stressed in a shear mode for greatest energy absorption efficiency.

Abstract: A small electrical fuze for use with an explosive projectile being subject to very high g forces both in the direction of and opposed to the line of flight. A lead charge is disposed in a barrel rotor whose axis of rotation is normal to the flight path for providing the safing and arming function. A system of controlling drive balls captured in shaped slots on the surface of the barrel rotor in cooperation with straight slots on an interior surface of a mounting cavity provide the necessary forces for a multiple step arming sequence in response to spin-induced forces on the fuze. These multiple step sequences include two direction reversals. A one-fourth wavelength shorted skirt surrounds the fed end of a monopole antenna to isolate the radio frequency currents thereon from the body of the projectile thereby improving the antenna pattern in the direction of trajectory.

Abstract: An improved correlation system for coded signals wherein a signal is known in pattern but is unknown in timing and is bi-phase modulated on a suppressed carrier signal and correlation is accomplished with a time reference signal without the necessity for search and coherent recovery of the suppressed carrier signal.

Abstract: A radar is mounted on an airplane with a pair of antennas affixed to the airplane and directed to one side thereof for providing a relatively narrow radar beam squinted approximately 20.degree. ahead of a line transverse to the direction of motion and approximately 20.degree. behind the line, respectively. The radar is constructed to alternately energize the antennas and a visual display system provides individually identifiable visual indications of targets interrupting the beams. The amount a target moves on the visual display between the interruptions of the forward and rearward directed beams provides a direct indication of the direction and speed of the target.

Abstract: A small electrical fuze for use with an explosive projectile being subject to very high g forces both in the direction of and opposed to the line of flight. A lead charge is disposed in a barrel rotor whose axis of rotation is normal to the flight path for providing the safing and arming function. A system of controlling drive balls captured in shaped slots on the surface of the barrel rotor in cooperation with straight slots on an interior surface of a mounting cavity provide the necessary forces for a multiple step arming sequence in response to spin-induced forces on the fuze. These multiple step sequences include two direction reversals. A one-fourth wavelength shorted skirt surrounds the fed end of a monopole antenna to isolate the radio frequency currents thereon from the body of the projectile thereby improving the antenna pattern in the direction of trajectory.

Abstract: An improvement in a prior art microwave diode coaxial oscillator circuit comprising an unloaded fundamental frequency cavity for prevention of energy loss in the matching termination at the resonant frequency of the circuit and a second harmonic resonant cavity for controlling second harmonic loading of the diode and for reducing noise in the output signal.

Abstract: A remotely situated detonator is acoustically triggered to detonate explosives. Conduit means capable of propagating an acoustic wave is used to transmit a precoded acoustic wave signal from a transmitter to a receiver. The receiver is provided with means for converting the precoded acoustic wave signal to an electrical output signal to actuate the detonator and decoding means for discriminating against noise signals. For safety reasons, time delay means may be provided to delay generation of the acoustic wave signals until after a predetermined time period. The aforedescribed detonation system may be utilized to rejuvenate or activate subterranean petroleum, gas, geothermal steam, or water and the like.

Abstract: A semiconductor packaging configuration is described in which a heat sink is bonded to a semiconductor chip or die and a conductor is bonded to the die and a metalized ceramic insulating body for achieving optimum heat transfer. Additionally, electrical matching and/or reduction of parasitic elements is achieved by a low pass matching filter comprising the capacitance of the chip or die, the capacitance of the metalized ceramic body and the inductance of the electrical conductor. This provides a significant improvement in power handling capabilities of a semiconductor chip or die operating at elevated temperatures and gigahertz frequencies. The electrical conductor geometry and its bonds provide a reduction of the thermal resistance of the package and also provides the inductance which forms part of the low pass matching filter.

Abstract: An improvement in a pulsed radar system providing coherent-on-receive signals utilizing digital techniques. The phase of the transmitted signal is compared to the phase of a stable local oscillator and the phase relationship is converted to a complex digital number which is then stored in a suitable short term memory. The received signals are also converted to complex digital numbers containing both the phase relationship to the stable local oscillator and the amplitude of the return video signal. The digitized received signals are then digitally phase corrected to provide coherence using the stored complex digital numbers for the correction. The internally generated timing signals are generated synchronously to reduce the inter-signal jitter due to noise.