Abstract: Disclosed is an improved underwater half-second pyrotechnic delay device ing an elongated tubular housing with a pair of holes for respectively threading suitable detonating cords through each end thereof. In operational burning series within said tubular housing are a plurality of lead sheathed protected explosives, a resilient pressure attenuating disc, a metallic capsule containing a calibrated delayed burning composition of 2/98B-Pb.sub.3 O.sub.4 having such geometrical configuration as to effect burning therealong for one-half second with considerable accuract, and another series of lead sheath protected explosives, a base charge, an explosive cord, and an end plug. An appropriate number of crimps are made along said tubular housing for holding the aforesaid elements in their proper places therein. Seals are employed at each end of said housing to make it watertight.

Abstract: An array of oceanographic instruments is supported on a tension line exteng horizontally at a selected ocean depth between a pair of vertical lines one of which is a ship-borne, end-weighted, winched cable and the other a float-supported and anchored guide line. To hold the array at a selected level, a buoyant package is moved along the guide line to a selected location where it grips the line and exerts its positive buoyant force. By matching positive buoyancy of the package to the negative buoyancy of the weighted cable, opposing, tension-producing forces are applied to the tension line to hold it in its horizontal disposition. The motive power for the buoyant package is supplied by the ship through its cable and the coupled tension line. The horizontal disposition of the array initially is achieved by moving both the cable and the buoyant package to the selected level.

Abstract: An array of antennas is sequentially sampled by digital commutation means provide a synchronous display of a synthesized antenna array pattern of reception on a cathode ray tube indicator. The commutation means and digital means for generating sine and cosine signals operate from a common oscillator source. Digital means are provided to advance or delay the phase relation of the pattern or of a strobe line with respect to the CRT sweep to effect rotation thereof into azimuthal alignment. Automatic bearing readout is digitally accomplished when alignment is achieved.

Abstract: A cooling system for a low noise, high power, light weight, compact rotary xpander engine of the Wankel type having two hot zones at the operating temperatures wherein a coolant path is provided which permits the coolest coolant to be delivered at the two hottest points. This increases the heat transfer area exposed to the coolant and delivers and rejects the coolant with an absolute minimum of plumbing.

Abstract: A compound aerostat employing a primary lifting mixture of helium and methanol in a first enclosure and a secondary lifting mixture of ammonia in a second enclosure. Both enclosures are contained within a single envelope. The methanol in the primary enclosure gradually condenses out as the altitude increases yielding a decreasing lift with altitude up to the stratosphere to provide passive altitude stability to the system. An absorbent, metallic lithium is provided within a separate container and connected to controllably absorb the ammonia and thereby control the displacement of the secondary enclosure. The process is reversible with the application of heat by means of propane combustion or solar heating. Other absorbents are LiNO.sub.3, LiCl and CaCl.sub.2. This controllable displacement system can compensate for solar superheat and snow and ice accumulation and facilitate long endurance flights, especially in the troposphere.

Abstract: A low noise, high power, light weight, compact rotary expander engine of Wankel type which features minimum unbalanced forces and elimination of balance weights because its rotating parts rotate about their centers of mass. The high inertia of its rotating housing eliminates the need for a flywheel and rotation in a plane normal to the centerline of the engine results in a preferential directivity to any residual disturbing forces. The elimination of balance weights and fly wheel provides a means for minimizing clearance volume from the inlet valve to the working space.

Abstract: Disclosed is a transistorized sonar transmitter which includes a power suy, a variable frequency, variable power, switching output stage, the switching of which is actuated by suitable drive signals from a control signal generator and amplifier. The power output from said switching stage is controlled by a time-ratio-control circuit which regulates the voltage thereof by means of a variable duration TRC drive signal from said control signal generator and amplifier, the duration of which is proportional to the power output thereof.

Abstract: Apparatus for protectively housing radiation transmitting or receiving eqment is provided with a window in the form of a spherical segment, which is formed of material transmissive to radiation of the frequencies of the equipment, and which has a seating surface. A mounting for providing forces to support the window and to resist external pressure applied thereto has a bearing surface, and a heated bearing gasket abutts both the bearing and seating surfaces. The gasket is provided for resisting wear between the bearing and seating surfaces, and also for transferring selected amounts of heat to the window. A heat regulator is coupled between the window and the gasket to control the amount of heat transferred to the window by the gasket, and structure is provided for continuously joining the window, the mounting and the gasket.

Abstract: A pin release assembly in which a release pin and a pull pin have mating tions which interlock within a fixed collar. The interlocking surfaces of the mating portions are oriented parallel to or normal to the longitudinal axis of the pins so that no frictional side loads are produced when the interlocked pins are pulled in a direction parallel to the longitudinal axis. The release is actuated by sliding the interlocked pins within the collar. The length of travel of the release pin necessary to accomplish the desired release is coordinated with the length of travel of the mating portions within the collar so that the interlocking surfaces are pulled from the confinement of the collar at the same time as the release is accomplished, thereby permitting the pull pin and the release pin to freely separate.

Abstract: An AM/AGC weighted diversity combiner utilizing the AGC and AM voltages f the AGC loops of a plurality of receivers for generating an optimum weighting signal or combining ratio.

Abstract: A spudwell cooperating with a pipe pile and a jacking mechanism for elevag a pontoon section above a body of water. The spudwell straddles the pipe pile through a pair of vertically aligned apertures through which the pipe pile extends. A plurality of pins rigidly affixed to the spudwell are aligned to extend through holes located in the pontoon section. When extended through the holes in the pontoon section, a securing plate engages the pins thereby securing the spudwell to the pontoon section. A pair of chains from the jacking mechanism are connected to the spudwell via a motion compensation system incorporated therein.

Abstract: A pilot training simulator system is disclosed that simulates a predetermd vehicle and the operational environment pertinent to the vehicle in such manner that the pilot being trained in the system may be responsive to the realistic impressions effected by this combination. Included in the system is a first subsystem for producing a video readout of various terrain and target scenes, a simulated vehicle cockpit second subsystem to which the terrain and target scenes are provided, and a third subsystem for providing a motion picture to the windshield of the simulated vehicle cockpit. A motion generator imparts realistic movements to the first subsystem and simulated vehicle cockpit, and console controls permit the manual operational control of both.

Abstract: A drugless eye examination system is disclosed that incorporates: an opti system for illuminating the retina of an eye, which has preferably been previously dilated by standard dark room or other drugless procedures, with infrared energy; another optical system for projecting a tiny red spot light on the retina of said eye, for eye-fixation purposes; and still another optical system for permitting an observer to look at and, hence, examine said eye, while it is being held fixed on said red spot light and illuminated by the aforesaid infrared energy. In combination therewith are several other optical systems which permit the taking of color or other photographs of the retina of said eye while it is optionally and timely illuminated with a flash of white light, and for implementing the remote display thereof by television or other projection apparatus.

Abstract: 1.

Abstract: A direction-finding array system which uses a plurality of hydrophones in a rossed dipole configuration and a phase-detection system. It is basically a time-of-arrival (TOA) system which is modified to act like a phase-detection system and is able to share much of the electronics of existing acoustic intercept receivers. Acoustic signals of a high frequency generated by an acoustic target under investigation are apparently heterodyned to obtain corresponding signals of an appropriate lower frequency. The apparently heterodyned signals are then processed in two identical processors giving rise to two outputs which are applied to X- and Y- axes of a cathode ray of oscilloscope or the like to obtain unambiguous bearing information about the acoustic target. Three dimensional bearing angle information is obtained by using a third processor which is identical to the two processors used in a two dimensional case.

Abstract: A surface profile follower and indicator system is disclosed which pneumaally senses and follows the gradients occurring in the surface of a modelboard by means of a pneumatic probe and negative feedback control sub-system which maintains said pneumatic probe at a predetermined distance from the modelboard surface being sensed at any given instant, as the entire profile follower system is moved in such manner as to effect a desired traverse thereof by any suitable carrier vehicle. A probe position pick-off is effectively connected to the aforesaid negative feedback control subsystem and supplies an analog signal to an appropriate readout which, in turn, indicates the position of said pneumatic probe with respect to a predetermined datum, thereby effectively indicating the surface irregularities of the aforesaid modelboard.

Abstract: Apparatus for continuously monitoring the concentration of oil in a stream f water meters carbon tetrachloride through a first infrared analyzer to generate a reference signal, mixes the carbon tetrachloride with a sample stream of oily water to extract the oil, then separates and passes the oil containing carbon tetrachloride through a second infrared analyzer that is zeroed by the reference signal. The sample water stream is returned to the main flow and the carbon tetrachloride is reclaimed and recycled.

Abstract: 1.

Abstract: Apparatus and method for calibrating a hydrophone array comprising a plurty of electrically interconnected hydrophones over a range of acoustic signal frequencies having a lower limit on the order of 1 Hz. Apparatus includes a container having a sealed cavity for sealing the hydrophone array in a selected fluid, an electro-acoustic projector for projecting acoustic signals of frequencies selected from the frequency range into the sealed cavity, and a reference hydrophone contained within the sealed cavity for generating a reference signal in response to each projected acoustic signal. Apparatus further includes monitoring equipment coupled to the reference hydrophone and to the hydrophone array for enabling a selected characteristic of one of the reference signals to be compared with the same characteristic of a signal generated by the hydrophone array when an acoustic signal is projected into the sealed cavity.

Abstract: A shaft decoupler wherein driving and driven components having grooved fles are keyed together by rollers held in the grooves by lands between recesses of a retaining assembly that normally rotates with the mentioned components and is momentarily arrested to allow the driving and driven components to advance the roller carrying grooves to alignment with the recesses to effect decoupling. The decoupler is characterized by the use of high strength plastic rollers, cooperating indexing elements to limit relative rotation between the driving component and the retaining assembly, and a solid lubricant filled plastic thrust and journal bearing.