Abstract: 1.

Abstract: Method and apparatus for reducing torpedo drag in which polymer drag redug material is carried by the torpedo in concentrated form, ambient water is ingested and mixed with the concentrated polymer to produce a seawater-polymer solution of predetermined concentration, and the solution is ejected from the torpedo nose to be swept rearwardly in intimate contact with the exterior surface of the torpedo under torpedo forward motion.

Abstract: An automatic means for decoding a wide data range of Manchester code data. Variable delay means are provided for the Manchester code decoder which are digitally controlled in response to the output of a data rate sensing circuit that provides a digital equivalent of the sensed data rate. The digital equivalent of the sensed data rate is used to optimize the amount of delay in the Manchester code decoder for the particular data rate of the data being received.

Abstract: A noise rejection circuit for a communications receiver in which the input o the receiver is continually sampled by a sweeping heterodyne oscillator to develop a difference frequency noise signal which represents the input noise over a wide frequency band. The receiver input is also processed by a conventional heterodyne oscillator to develop an output at an intermediate frequency that is comprised of the desired signal plus the noise component. Further processing of both the swept heterodyne oscillator and the normal heterodyne oscillator outputs in a differential combiner serves to remove the noise from the desired data signal.

Abstract: Apparatus for attaching a cable terminal to a ferrule using a snap ring to chieve a rotatable connection wherein one jaw of the apparatus supports the terminal, a second jaw supports the ferrule, and an intermediate third jaw supports and compresses the snap ring. With the snap ring initially mounted on the terminal, closing the jaws together compresses the snap ring so that the terminal can be fully inserted into the ferrule until the snap ring is captured within the ferrule and completing the connection.

Abstract: An electronically controllable, wide angle of view, notch filter operates attenuate predeterminable narrow bandwidth wavelengths of light energy. An enclosure contains a selected material characterized by exhibiting strong quantum mechanical coupling between two determinable energy states of different levels above its ground energy state and also producing radiated emission within the desired narrow bandwidth wavelengths when externally excited to populate the upper of the two determinable energy states. Transparent windows at opposite ends complete the enclosure which is maintained at a desired temperature to vaporize the selected material.

Abstract: A grinding and polishing tool is designed to finish the ends of fiber optic able terminals preparatory to installation or maintenance, the tool being portable to enable the work to be performed in a field environment, and is air driven to eliminate any electrical arcing in hazardous areas, such as around aircraft and vessels.

Abstract: Fiber optic cables are employed to convert punched card type of input infation to an alpha-numeric visual display. Separate groups of the fiber optic cables have first terminal ends positioned in an aperture area corresponding to the punched card aperture area. The second terminal ends of each group of fiber optic cables defines a single segment of an alpha-numeric character in a uniform multi-segment format. When a punched card or punched tape type of input information is inserted between a suitable source of light energy and the first terminal ends of the groups of fiber optic cables, those aperture areas which are punched out permit the transmission of light from the light source to the visual display, thereby illuminating corresponding segments of characters in the uniform multi-segment format at a display plane and converting the punched card information to alpha-numeric visual display.

Abstract: A transmitting antenna that can be inflated with air or a liquid dielectric nd floated in seawater. It consists of a cuplike cavity backing a radiating annular slot antenna. It can be used to communicate to submarines or surface ships or as a navigation transmitting antenna. It is small compared to the wavelength of the operating frequency.

Abstract: A passive, high-speed, automatic shutter for controlling the transmission light energy of known wavelengths along a predetermined optical axis is provided to protect imaging devices against sudden, undesirable optical overload which may cause damage. A large plurality of contiguously positioned micro-channel optical waveguides is axially aligned parallel with the optical axis to intercept the light energy. The large plurality of micro-channel optical waveguides provides desirable maximization of resolution for transmitting the image to the imaging device. The micro-channel optical waveguides include a saturable absorber material which is selected for its property of absorbing the known wavelengths of light energy up to a determinable level of intensity and transmitting the known wavelengths of light energy when that determinable level of intensity is exceeded.

Abstract: A clamp assembly is provided for a dual parachute release mechanism for a litary personnel-type parachute which enables the automatic power cable to be in a condition to function for initiating parachute deployment, even though the manual ripcord cable and housing may have been previously released accidentally and prematurely.

Abstract: A reliable, repeatable and stable generator capable of producing noise with nown or given amplitude probability distributions up to 96 dB dynamic range, commonly found in atmospheric noise VLF/LF frequency bands. A continuous impulse noise amplitude probability distribution is digitally synthesized in a piece-wise fashion in 6 dB amplitude increments. These increments are linearly combined with a digitally generated Gaussian noise component for simulation of VLF and LF atmospheric noise.

Abstract: A logic circuit for decoding parallel BCD output from a time code generator o operate an analog event marker pen on a strip chart recorder, every one minute a one second pulse, every ten minutes a ten second pulse, and every hour a sixty-one second pulse output is generated.

Abstract: A directional loop array antenna for very low frequency (VLF) reception. array comprises four closely spaced loop antennas forming a unidirectional reception pattern with a main beam of less than 43.degree. between half power points. The array combines two double loop coaxial antennas dispersed with their axis parallel along 45.degree. lines. The signal from one double loop array is delayed sufficiently such that a unidirectional reception pattern is formed.

Abstract: A parachute container for aircrew ejection seats is designed with a rigid dy having a reduced volume and weight, and which is hermetically sealed and filled with an inert gas to extend service life without maintenance, the container being provided with a detachable, flexible cover to permit the container to expand in volume proportional to the reduction of external atmospheric pressure. The cover is made of an elastomeric material having elastic memory capable of returning to its preformed shape as atmospheric pressure increases, repeated in operations from sea level to high altitudes.

Abstract: A pulsed laser produces emitted laser energy by electron impact dissociation of metal dihalide and cyclic recombination. A metal dihalide selected from sub group II-B of the periodic table of elements is contained within an elongate sealed enclosure. Two elongate electrodes having external terminals are supported in parallel relationship within the enclosure, forming a gap parallel to the principal axis of the enclosure. A source of pulsed electric power is connected to the terminals of the two electrodes, producing repetitive transverse electric discharges across the gap. An inert buffer gas is included within the enclosure for aiding electric discharge uniformity, and to provide vibrational relaxation of the lasing medium in its electronic states.

Abstract: A millimeter wave MIC diplexer constructed in either stripline or microstrip comprising two edge coupled bandpass filters separated by specific lengths of transmission lines designed to separate two bands of frequencies. Input signals having frequencies within a first band are passed through one of the bandpass filters while being isolated from the other and input signals having frequencies within a second band are passed through the other bandpass filter while being isolated from the first filter.

Abstract: A method for the thinning and automatic leveling of layers of a semicondur for use in device fabrication applications. The method is to be employed with anodic thinning wherein a conducting semiconductor layer on a high resistivity substrate is placed in a suitable electrolyte and voltage is applied so that the sample is made positive with respect to a cathode, also immersed in the electrolyte. The instant method is directed to the anodic thinning of irregularities in the semiconductor by slowly immersing the semiconductor into the electrolyte such that the location of irregularities can be determined and processed by monitoring the anodic process.

Abstract: Two pyroelectric vidicons are adapted to alternately receive infrared ene radiated from an object by means of a rotating half circle mirror and fixed mirror arrangement. The alternations of the infrared energy received between the two vidicons are synchronized by means of a synchronization and drive circuit adapted to receive frame sync pulses from the camera circuitry. By this arrangement, information is received by the camera 100% of the time.

Abstract: An InP/SiO.sub.2 insulated gate field effect transistor which exhibits power gain at microwave frequencies is manufactured by using an n-type epitaxial semiconducting InP film on a semi-insulating InP substrate and depositing a pyrolytic silicon dioxide insulating film on the conducting InP film to form the gate insulator.