Abstract: An electronic counter countermeasure (ECCM) circuit for Automatic Gain Cool (AGC) electronic countermeasure (ECM) deception of conical scanning tracking radar receivers having a two position limiter in circuit with the AGC circuit to eliminate signal information enhancing the amplitude modulation of the error modulate signal to provide selectable values of dynamic range in a signal processor to render the ECM ineffective in target evaluation.

Abstract: An decoding system for transmitting a signal through a noisy, unstable, mipath environment, in which the signal consisting of eight possible symbols is encoded using four of eight possible frequencies in an orthogonal Hadamard matrix, transmitted through the environment, and decoded using the same orthogonal Hadamard matrix, thereby providing a correlation result which can compensate for at least one error in the received signal for each symbol.

Abstract: The operational amplifiers conventionally used in electronic analog compus can be replaced with fixed-gain differential amplifiers having no external negative feedback to control their gain. This allows a large increase in the bandwidth of the computers, with a resulting faster response time. Circuits for summing, integration, and differentiations are specifically disclosed using fixed-gain amplifiers.

Abstract: An improved electrically controlled thermotropic liquid-crystal heat valve to control the flow of heat between two bodies of different temperatures by interposing therebetween a fluid layer of liquid-crystal material having a nematic temperature range that includes the temperature of both bodies. This type of heat valve has particular application to any free-swimming divers' diving garments, to provide some thermal protection against the cold ambient water. The heat valve uses stable liquid-crystal materials encapsulated in a sealed environment, with the valves' electrodes being shielded and not in direct electrical contact with the liquid-crystal material. This arrangement essentially completely eliminates the electrochemical effects which can otherwise degrade the liquid-crystal materials, so that the liquid crystal may function for a very long time.

Abstract: The invention relates to a Faraday cage for use with relatively unshielded lectrical instruments to allow the instruments to be used in an environment of high electromagnetic interference. The cage is constructed of lightweight plastic material and is designed to be portable. It is a rigid cage when unfolded for use, yet is capable of being folded into a compact one-piece, substantially flat, stowable package, which can be erected for use with a minimum of effort.

Abstract: A surface examination assembly for examining surface contours by detecting nd recording surface contour data including profile data to determine the existence of variations of the surface from design specifications, and to determine the existence of structural degradation as indicated by surface contour changes includes a mounting frame for holding the assembly elements and for mounting the assembly on or near the surface to be examined, a probe arm adjustable mounted on the frame by means of a slide block, the slide block permitting movement of the probe arm in both a vertical and a horizontal position relative to the frame, a recording device for use with a recording medium mounted on the frame, the recording device being operatively engaged with the probe arm and moveable in response thereto to permit contour and profile data detected by the probe arm to be transmitted through the recording device to the recording medium.

Abstract: An improved apparatus for testing a sample by means of luminescent reaction to detect reactive materials therein. A ribbon of filter material, which may be translucent or opaque, is provided to filter the sample and to carry the residue to a reaction position. A translucent surface is provided to carry a reagent to the reaction position. Both surfaces are brought into mutual contact in the optical vicinity of a photodetector, which thereby detects the resulting luminescent reaction to provide an indication of the quantity of reactive material present in the sample. An improved pinion roller advances the ribbon of filter material in a reliable fashion. In an alternative embodiment, the ribbon of filter material is used without the translucent surface.

Abstract: A method of loading a cell of a vertical launching system missile launcher n a combatant ship with a canistered missile from a supply ship wherein the canistered missile is transferred from the supply ship to a fixed guide on the deck of the combatant ship, upended in the guide, moved away to a position over the cell of the missile launcher, and then lowered into the cell.

Abstract: Various samples of energetic materials are placed in multiple disposable culture tubes to simultaneously monitor and deterine their stability, reactivity, and compatibility. Each tube is evacuated and heated to accelerate aging of the samples, while a pressure transducer provides pressure readings inside the tube for computer analysis.