Abstract: A system for jamming continuous wave radar type proximity fuzes used on surface-to-air missiles where the fuze requires an increase in return signal power level and a rapid frequency change for detonation. The system basically includes a receiver, amplifier, and transmitter. A received fuze signal is filtered and square wave modulated then sent to a first traveling wave tube for amplification. The signal is then amplified again by a second traveling wave tube which is modulated by a transit time modulator which continuously varies the phase shift through the tube in a linear fashion. The linear variation in phase shift is the equivalent of a displacement in the frequency signal being amplified. The signal is then reradiated to the missile giving the fuze a target sensing causing it to predetonate.

Abstract: An embedded stress sensor gage for use in solid fuel rocket motors and the like consisting of a modified bridge circuit containing temperature sensitive resistive elements and a pair of series connected resistors coupled in parallel with the bridge. A comparison of the voltage at the midpoint of the series connected resistors and the output voltage of the bridge and the voltages at the active resistive elements provides information from which it is possible to determine the change in gage element resistance for each temperature and stress condition.

Abstract: In a hybrid connector for microwave devices between coaxial and microstrip application, the utilization of a calibrated, shaped, dielectric spacer in the connection for phase matching.

Abstract: A low offset field effect transistor correlator circuit where one signal is applied to a balanced input through capacitors to the drain and source electrodes of a field effect transistor and having a second signal applied to the gate of the transistor. Low pass filters are connected to the source and drain, and the correlated input signals appear across resistors connecting the outputs of the filters.

Abstract: A system having a pair of input signals, one of which is modulated and transformed into a pair of signals phased 180.degree. apart. These signals are acted on by a FET correlator where the second input signal controls the FET gate. Correlator output is amplified and a blocking capacitor removes DC offset, a synchronous switch operated at the modulated frequency converts the remaining AC to DC which is amplified to the output.

Abstract: A system for monitoring changes in azimuth due to shifts in geological features of the earth's surface, using a collimated laser beam which is split and reflected from a plane mirror and a prismatic mirror to target area showing translational and rotational changes in the mirrors location. The beam is directed to a second pair of mirrors at an angle to the beam which will verify the location movement, source or target.

Abstract: A telescopic fluid ram or thruster utilizing pressurized gas and having an inner and outer piston that slides within a cylindrical bore including a central probe which is tapered and extends into the bore of the inner piston where it will cause the inner piston to move under high pressure while the gas escaping from around the tapered area produces a holding force to hold the outer piston in place until the inner piston is fully extended, at which time the outer piston will extend under a reduced pressure.

Abstract: A cooling control system for a convergent-divergent gas turbine exhaust nozzle which permits ducting of cooling air during the non-augmented mode of engine operation. A Curtain Liner is hinged at the forward end and able to fully collapse against the nozzle convergent section cutting off cooling flow. A door, connected to the nozzle, when opened allows cooling air to pass between the nozzle and the curtain liner causing the liner to move away from the nozzle wall and the cooling process to take place. Movement of the curtain is limited by a link at the end remote from the hinge.

Abstract: A system for allowing transmitter and receiver optical systems to utilize a common aperture and common optical elements simultaneously by introducing the transmitted beam into a small coaxial blind zone generated by an obscuration.

Abstract: A flexible recording head mounting assembly where the head is secured to a cap which is supported by a pressure sensitive diaphram, the head being pivotally secured to the cap and having an off center shoe located near the pick-up end so that the head is inclined to a recording medium and a hydrodynamic force minimizes the space between the head and moving recording medium.

Abstract: A system for controlling temperature in phased array radar modules where a combination support plate-heat exchanger allows a cooling fluid to circulate therethrough and a heat pipe extends the length of the module and into the support plate-heat exchanger where heat is taken to a remote heat exchanger. Heating elements are attached to the support plate-heat exchanger to facilitate initial system warmup.

Abstract: A self pressurizing chaff canister having a frangible enclosure containing a chaff matrix and having an end cap with a spring loaded fracture pin, and gas ports, held in a case by shear pins, the case in turn is secured in a housing by a threaded electrical squib whereupon firing of the squib will shear the pins, force the enclosure from the case while simultaneously pressurizing the enclosure, whereupon ejection of the enclosure from the case will cause the fracture pin to strike the case at which time the chaff be appropriately disbursed.

Abstract: In a tubular plasma display consisting of an array of parallel glass capillary tubes sealed in a plenum and attached to a rigid substrate, having different thermal expansion properties limiting operational temperature range, the improvement being an extension to the substrate creating a gap which separates the tube manifold from the nearest point where the tube and substrate are bonded.

Abstract: The use of ion implantation to produce low concentrations of chromium, oxygen or iron in a gallium arsenide junction type semiconductor, utilizing the accompanying low resistivity to provide an improved device.

Abstract: A radiation transparent base having a number of coincentric Fresnel rings mounted on one face, and one-quarter wavelength in thickness and a reflective coating covering the face and rings and a detector mounted on the opposite face to collect reflected in phase radiation.

Abstract: A system for autonomously unloading accumulated angular momentum on space craft reaction wheels in the attitude control systems with external torques generated by the interaction of spacecraft magnetic dipoles with the earth's magnetic field.An onboard computer receives reaction wheel speed information, wheel speed threshold and geomagnetic latitude information and controls magnetic dipoles that will create a spacecraft torque and desaturate reaction wheels in a closed loop system.

Abstract: An article and method for fabricating one and two dimensional arrays of superconducting and normal junctions by depositing metal films on photoresist gratings. In one mode superconducting Josephson junction arrays of the Dayem bridge type are fabricated by scratching a groove across the grating with a sharp diamond point.

Abstract: An antenna window for ablative type heat shield where the forward edge of the window is below the level of the heat shield and the trailing edge extends above the surface of the heat shield creating abrupt steps in the overall surface, precluding severe local material loss due to differences in ablation rates of the window and surrounding heat shield material.

Abstract: A solid state sensing retina for infrared vidicon television camera tubes using a low voltage electron beam, consisting of a monolithic silicon wafer having an n-type substrate and two dimensional array of p-type islands, each island has a Schottky electrode photoemitter and substrate contact buss, an ohmic contact pad allows charging of the p-type region beneath the Schottky electrode.

Abstract: A buffer rod for transmitting and receiving ultrasonic waves in a high-temperature gas medium including a plurality of flat discs center coupled along a mechanically tuned buffer rod and connected to a piezoelectric or magnetostrictive element to convert disc vibrations into electrical signals.