Abstract: Input videos from a multiple beam radar system are processed beam by beam first threshold devices which are weighted in accordance with signals from all the beams, and then the signal has to pass one of two further threshold devices before being processed as a target indication. One of the additional threshold devices is biased by all adjacent beams of the beam being processed; and the other threshold device is biased by weighted factors of the adjacent beams. The weight being dependent upon whether the beam is a near adjacent beam or a diagonally adjacent beam.

Abstract: The invention concerns an analog TV-type process and apparatus for rapid cessing of pictorial information. A transparency is rapidly scanned by a line of light source, scanning of which is controlled by conventional electronic means. The light output is applied to an image converter tube and the output thereof applied in line by line sequence to a transmissive plate. The plate has parallel strips with transmittivities determined by the operation to be performed, such as biased sines or cosines for a Fourier transform. A line of the picture on the transparency is projected successively on all the transmissive strips. The total amount of light output of each strip of the plate is applied to a photomultiplier tube. The coefficients of the Fourier transform are obtained from the difference between the photomultiplier output after illumination of a line of the transmissive plate and a stored signal which specifies the bias level.

Abstract: The polarization control of the antenna is obtained by space feeding the nals through a polarization control rotator to a monopulse feedhorn.

Abstract: A two-phase material of foamed cement or concrete and polymer providing thermal insulating, structural elements composed of an unimpregnated foam cement or concrete core and impregnated surface regions of the two-phase material and method employing a hydraulic head or vacuum means to provide high polymer loading through a large volume of foam voids in the cement or concrete for easy impregnation of high viscosity monomers and uncured resins to a considerable depth below the surface of the cement or concrete before in situ polymerization.

Abstract: A device for measuring the statistical distribution within a discrete range f a measured continuous variable. A conventional type meter which employs a scaling amplifier in series with weighted filters, a true RMS detector and time averager is used to detect the variable level and convert it to a analogue voltage of magnitude proportional to the magnitude of the variable at any given instant. The voltage signal is then passed through a scaling amplifier to an analogue to digital converter. The converter is controlled by a timer with an adjustable rate in such a way that the converter output is pulsed. Each level of the digital output is connected to a counter. Since each level corresponds to a discrete range of magnitudes of the variable, the percent time within a given discrete range can be calculated from the ratio of the pulses counted at a given level to the total number of samples taken.

Abstract: In a digital communications system having widely dispersed nodes transmitg between each other, a method and apparatus for synchronizing the processing of data at a node. Data transmitted between nodes is stored in speed buffers. The output of each buffer at a node is connected to the nodal processor and is controlled by the nodal clock. Synchronization is accomplished by performing a periodic adjustment of the frequency of the nodal clock. This adjustment is arrived at by sampling the buffer content of each node and extracting an error signal which represents the buffer position relative to the half full buffer position. The error signal is suitably weighted by a control and summed with all other weighted buffer error signals to produce a total error signal, which is added linearly to the original initial condition of the nodal clock and converted to an equivalent frequency.

Abstract: A flueric through bulkhead rocket motor ignitor in which a flueric thermal nergy generator is used to set off a pyrotechnic/explosive pickup charge that in turn sets off a donor pyrotechnic/explosive charge that transmits its energy through a thick metallic bulkhead that is utilized to maintain pressure integrity of a rocket motor, and the donor charge transmits its energy to a pyrotechnic/explosive pickup charge that in turn sets off a receptor charge that is utilized to ignite a solid propellant composition.

Abstract: An array of parametric amplifiers is optically fed pump power by a pump sce. Beam steering of the array is provided by changing the apparent phase of the pump source.

Abstract: Apparatus for use with graphic material supported on a planar surface. Two identical clamps, upon which a reeling means is mounted, are connected by a tape and mounted on the edge of the planar surface. The clamps are U-shaped and have a longitudinal slit in one leg. On the other leg a spool means supported by a housing is attached by a bracket. Each end of the tape is threaded through the slit, around the clamp and connected to the spool means.

Abstract: A small cylindrical pyrotechnic pellet having an igniter, a time delay, and n output charge of easily ionized material for placing a predetermined number of ions and free electrons at a predetermined position in the upper atmosphere or space.

Abstract: Pulse measurement of chirped radar returns is made before dechirping by the se of a linear detector averaging circuits and time delay circuits such that the measurement is indicative of the RMS power of the pulse. Depending on the received chirp pulse different averaging circuits and time delay circuits are switched in so that its output is coincidental with the delayed dechirped signal. Output is encoded for a digital indication of the power and is fed through scalers to set the threshold of the video signal processor.

Abstract: A method is disclosed for curing a nitrogen-fluorine propellant in an eleomagnetic alternating field. The propellant is cast into thin walled-titanium tubes of predetermined size and with a graphite-epoxy overwrap. When the propellant-filled tubes are exposed to electromagnetic radiation, the propellant is cured to a grain in about 30 minutes as compared to about 5 days required for thermal curing at 135.degree.F. The disclosed method of curing is achieved because of the permeability of the overwrapped tubes to microwaves. The grain cured by the disclosed method acquires the desired mechanical properties, particulary, a greater uniformity, as indicated by a higher Shore hardness value, within a considerably shorter time period. The greater uniformity of mechanical properties throughout the propellant grain is particularly essential for this application because of the small quantity of propellant and the thrust repeatability necessary from one micromotor to another in the Maneuver Motor Array.

Abstract: A thruster nozzle for a vehicle control system having a circular cross section inlet and an enlongated slot shaped cross section outlet with a gradual transition from one to the other, coupled with a cant angle between the axis of the inlet and the axis of the outlet.

Abstract: A feather-edge conductive pattern is sandwiched between two ferrite bars so s to cause different degrees of residual magnetism in the bars. Two other blocks of materials having relative high dielectric constants sandwich the ends of the bars, and the whole device is inclosed in a waveguide which will have variable phase shifts in accordance to the residual magnetism of the bars.

Abstract: A detector of an infrared telescope that must be cooled to near 20.degree4.degree. K in order to function properly is cooled by spraying a liquid cryogenic fluid through a small nozzle into a vented chamber of subatmospheric pressure to cause the pressure of the cryogenic fluid to be dropped below its fluid triple point pressure and thereby freeze to deposit frozen crystals on the detector and thereby cool the detector to the required temperature for proper functioning of the detector. The frozen crystals deposited on the detector will be sublimed therefrom by the heat leaked and generated in the detector.

Abstract: An infrared telescope that has a detector therein that must be cooled to r 20.degree.K in order to function properly is cooled by freezing a pool of liquid cryogen through rapid venting of a chamber containing the cryogen to a low pressure to cause the cryogen to freeze by the pressure of the liquid cryogen being dropped below the fluid triple point pressure. In this way, the frozen pool of liquid cryogen which is in contact with the detector maintains the detector in a cooled and operating range.

Abstract: The invention concerns an automatic continuous-flow fluid analyzer of the pe wherein a stream of fluid, segmented by air bubbles or other separating medium inert to the fluid to be analyzed, passes through a colorimeter flow cell. The bubble artifact is eliminated from the photoconductor signal while allowing the signal produced from the fluid segment to remain intact. This is accomplished by means of a signal comparator which operates as a digitally controlled differentiator, but could alternatively be a purely analog differentiator. The signal comparator through continual signal comparisons momentarily samples and stores a photoconductor output.For a finite period of time, the stored value is compared with all subsequent succeeding photoconductor output signals. If any signal that follows varies outside a preset range from the stored value, the comparator logic concludes that an air bubble is passing and the output to the recorder is not changed.

Abstract: The invention concerns a device for tongue brushing, the use of which maiins positive oral hygiene and application thereto controls proliferation of plaque forming bacteria and the like. It is the object of this invention to remove from the tongue populations of bacteria and extraneous cellular debris associated with plaque formation, dental caries and gum diseases. A low vertical profile of the device alleviates severe gag reflexes thereby permitting the posterior, dorsal surface of the tongue to be cleaned.

Abstract: This invention disclosure relates to the incorporation of a high nitrogenntaining compound selected from tetrazole and bitetrazole in the form of a doughnut forward of the nozzle throat or in the form of a toroidal ring attached to the aft end of the nozzle exit cone. Both have been demonstrated as an effective means of reducing the quantity of water in the exhaust plume to an acceptable level which does not impart adverse effects on sensors or cause a reactive effect on the graphite constituents of the rocket nozzle. The compound, bitetrazole or tetrazole, can also be incorporated into the solid propellant where it will function similarly as a means or mechanism for water removal from the exhaust plume. Because of its contribution to the propellant's performance through the generation of near-incompressible gases, N.sub.2, H.sub.2 and CO, it is a desirable propellant ingredient.

Abstract: Each of the parameters of objects in the field of view is measured and inidually compared with standard parameters. Differences in these parameters are multiplied by individual weighting factors and they are summed for each object. Object having the lowest sum is the desired target.