Abstract: An air launchable sonobuoy having two separate liquid chemicals which react pon mixing to form an expanded, rigid foam flotation device. Upon deployment in the air, windflaps release a preloaded plate within a submersible housing and urge the chemicals to mix and foam in an elastic envelope. After water impact, an orifice in the housing permits water to fill the voids at a rate sufficient to allow the housing to remain afloat until foaming and erection of an antenna within the envelope is complete. As the envelope expands, a latch releases it from the housing and permits the housing when flooded to sink to the desired depth determined by the payout length of a cable within the housing connected to the flotation device.

Abstract: A quick deployment vehicle (QDV) for implanting a transponder or beacon on he ocean bottom in an upright position exposed for receiving or transmitting acoustic signals. The vehicle includes a ballistic body of separable fore and aft sections. The fore section includes a core mass for penetrating the ocean sediment, and the aft section includes a beacon for signal transmission. A predetermined interval after impact, as determined by a programmed deceleration profile stored in memory, the sections will separate. The sensed deceleration of the vehicle is compared at predetermined intervals to the stored profile, and when the sensed level is less than the stored level, a squib is fired to separate the two sections. The aft section penetrates and remains exposed above the sediment, while the fore section further penetrates into the ocean bottom.

Abstract: A DICASS test set utilizes a microcomputer to process infromation from an put and a down link section, generate the appropriate control logic for all the various electronic sections and format the appropriate output data for the output in uplink sections. A keyboard is provided from which an operator can input data the controller. A display and printer is provided to which the controller outputs information to the operator. The down link section consists of a UHF receiver, envelope detector, timer, filter bank, decoder, frequency counter. The uplink section consists of a reverberation simulator, a signal synthesizer, bearing, echo level and sea state controllers, three separate noise sources, multipliers and summing circuitry.

Abstract: A grinder for preparing circular seats behind elliptical handholes of mar boilers. An air motor, mounted within an expandable housing, drives a grinding wheel against the inside surface of the handhole. The housing is expanded to be secured in the elliptical handhole. The center of the motor orbits on a circle about the center of the housing so that a circular seat is formed about the inside edge of the elliptical handhole.

Abstract: Subharmonics of a data waveform are generated for the purpose of reducing ta bandwidth prior to transmission. Input data waveform is phase split and the antiphased output signals are fed to a rectifier. The rectification of antiphased signals creates two pulsating voltage with opposite polarity. The pulsating voltages are alternately switched by a chopper to provide a sinusoidal signal. The sinusoidal signal is filtered to average the energy of the pulsating voltage to provide a smooth waveform of one-half the frequency of the input data waveform.

Abstract: A hand-held welding torch is disclosed having a pair of foldable handles to ermit maneuvering of the torch in confined spaces. The torch is of the type having a non-consummable electrode radially mounted on a longitudinal shaft which can be inserted into the bore of a tubular member and rotated so that the tip of the electrode moves over a circular path around the axis of the tubular member. In one preferred embodiment, a front handle is coupled to a spring-loaded collet having an expanded end and mounted for axial movement about the shaft upon actuation of the front handle. A set of radially-projecting jaws pivotally mounted immediately about the collet are spread outward to positively grip the bore by movement along the expanded end so that the torch is properly positioned in substantially the center of the bore and supported therein during rotation of the electrode.

Abstract: A system for transferring cargo at sea by helicopter includes an automatily activated self inflatable apparatus for reducing the velocity of the cargo if jettisoned or inadvertently dropped into the sea and for keeping the cargo afloat until retrieval may be accomplished. The cargo is lifted by a support sling attachable to a helicopter suspension cargo hook and simultaneously connected to a second sling in parallel to the helicopter through the rapidly deployable retardation and floatation device. Release of the support sling causes the cargo to drop and initiate deployment and inflation of the ribs of the parachute thereby retarding the cargo's descend and providing buoyancy for its floatation.

Abstract: A system for remotely controlled focusing of a reconnaisance camera instad on an aircraft. The camera can be focused to any of a plurality of pre-selected focused position, each position having a unique corresponding binary coded decimal designator generated from a position correlated switch. When a change in focus is selected by depression of a push button switch, the resulting binary coded decimal designator for the desired focus position is added to the binary coded decimal designator from the optical switch. Differences between the two designators will cause a scanner to rotate and scan all optical switches, while simultaneously a gear mechanism adjusts the camera lens focus position to the position corresponding to that for the switch scan at that increment of time. When the scanner locates the activated switch whose binary coded decimal designator is the same as the designator of the selected pushbutton, scanning and focusing adjustments are halted.

Abstract: A balanced preamplifier is disclosed for impedance-coupling an audio signal source, such as a microphone, to a differential amplifier. In one embodiment, the preamplifier comprises a first stage wherein a pair of complementary bipolar transistors are connected in a common-base configuration and coupled to a low-impedance microphone so that the microphone signal is appied to the respective emitters of the transistors and transformed to an appropriately higher impedance level at the respective collectors thereof with common-mode passage of external and internal noise. A second stage including a complementary pair of bipolar transistors in a common-emitter configuration is coupled to the first stage for greater power and voltage amplification requirements.

Abstract: An aircraft crewman protective system properly positions the lower legs and eet of the crewman during emergency egress from an aircraft. The system includes a pair of plate members connected to swing outward from the under side of the crewman's console at each leg position and means for deploying the plate members at the time of ejection. Upon deployment, the plate members push the feet of the crewman backward guiding the feet and lower legs within a contact-free envelope during ejection without changing desired spinal position of the crewman.

Abstract: A water-displacing paint is disclosed for coating metallic surfaces in hu environments to prevent corrosion. The paint comprises controlled proportions of a silicone alkyd resin to serve as a binder and physical barrier, solvents including ethyl acetate, aromatic mineral spirits and 1,1,1 trichlorotrifluorethane for ensuring water immiscibility, a petroleum sulfonate to inhibit corrosion and aid surface absorption, and an organo-titanate of isopropyl tri-titanate to promote surface adhesion. Selected amounts of titanium dioxide and zinc molybdate are included as pigments in one effective example of the paint to provide it a white color. Alternate colors may be produced conventionally by adding standard tinting pigments in amounts sufficient to yield the desired color.

Abstract: A novel low cost air-launched sonobuoy having a spherical housing of a liweight semi-rigid foam housing encapsulated the electronic components. The housing includes recesses for receiving a hydrophone and cable pack, and for inserting D-size batteries just prior to launching. A vertical antenna is wrapped around the housing and prevents the pack from deployment until the sonobuoy is charged with the batteries and immersed in water. The free end of the antenna is released and unwraps to permit deployment of the hydrophone and cable pack. The sonobuoy is stored without the batteries in a sealed moisture-proof envelope which can be easily torn open and removed when desired.

Abstract: A polyurethane-quartz laminate suitable for aircraft radomes. Controlled amounts of a mixture of unpolymerized 4,4 diphenyl methane diisocyanate (MDI) and 2,4 toluene diisocyanate (TDI) are polymerized with ethylene glycol at a preselected temperatures and periods to produce a polymeric resin of relatively few nonpolar isocyanate groups. The resin is impregnated and cured in layers of quartz cloth to form a relatively high strength composite or laminate having a low dielectric constant.

Abstract: Interlaminar shear strength of an aircraft wing made of graphite-epoxy laate is significantly increased by embedding thin steel wires in preselected locations of high stress in alternating rows .+-.45.degree. to the plane of the laminate before it is cured. This cross wire reinforcement prevents brittle delamination, arrests propagation of delamination and reduces scatter of interlaminar strength.

Abstract: A stretch-staging method is disclosed for straightening continuous fiber columns impregnated within a resin-based tape material to increase the strength and reliability of the material. The tape material is supported about the circumference of a half-cylindrical fixture and separated therefrom by a thin lubricating film to reduce surface friction. Loads of substantially equal weight are longitudinally applied at opposite ends of the tape material about the fixture, and the combination is heated in an oven to an elevated temperature for a predetermined period of time thereby stretching and staging the tape material so that distorted fiber columns are straightened and retained in a straightened condition as the resin is advanced.

Abstract: A mechanical and electrical connection for a piezoelectric member of polyic material such as polyvinylidene fluoride, and method for forming such a connection. To form the connection, the piezoelectric member is first masked to prevent a preselected portion of its surface from being coated during subsequent coating operations. An electrically conductive member such as a lead wire or a solderable terminal is then attached to the nonmasked area of the piezoelectric member with adhesive such as epoxy. The masked piezoelectric member, the electrically conductive member, and (incidentally) the mask are then coated with a conductive coating such as sputtered gold to electrically connect the conductive member to the piezoelectric member. The mask can now be removed from the piezoelectric member if desired, although it can be left in place as a convenient vise.

Abstract: Prostaglandin analogs and process for the preparation thereof as precursors or the synthesis of oligomeric mixtures exhibiting biological activity for protection of oxidative phosphorylation of degraded mitochondria. The analogs have the general formula: ##STR1## synthesized by O-alkylating a 2-alkylcyclopentane-1,3-dione to form an enol ether, reacting the ether with CH.sub.2 .dbd.CHMgBr to form a vinyl, oxidizing the vinyl with OsO.sub.4 and NaIO.sub.4 to form an aldehyde, and reacting the aldehyde with a sodium salt of dimethyl (2-oxoalkyl)phosphonate.

Abstract: A universal cargo restraint system for an intermodal shipping container. h of four restraint cables are connected at the one end thereof to one of the corners of the container front panel and extend rearwardly to a movable rear bulkhead. The other end of each cable includes a threaded rod extending through a selected one of a plurality of holes at the sides of the bulkhead. Nuts adjustable along the length of the rod urge the bulkhead against the cargo within the container. Dunnage and shims positioned about the cargo provide to bracing against to-and-fro and sway motion. A singular cable configuration enables easy installation in and removal from various container and cargo configurations.

Abstract: A stabilizer or drogue, packageable in a minimal volume, which can be auttically deployed to dampen horizontal, vertical and rotational motion of a device, such as a hydrophone, operating in a relatively viscous fluid. The stabilizer is disposed on a line or cable connected between the device and a surface float, and includes a horizontally oriented fabric fin extended and supported by a plurality of rigid arms, and a plurality of vertically oriented perpendicular fabric fins connected to, extended and supported by the arms and by a rigid vertical tube slidably disposed on the line. The arms are adjacently pivotably connected to a rigid body loaded by the device. Before deployment, the fabric is wrapped around the tube, and the arms are in a raised position substantially adjacent and parallel to the line and the tube, all stowed within a cylindrical container having an open end. The closed end of the container is fixedly connected to the line.

Abstract: Serving as a hydrophone in the lower unit of the sonobuoy, two surface acoustic wave resonators for determining the resonant frequency of two independent oscillators are also used to sense pressure and thus sound. The outputs of the two resonators are mixed and then passed through a low pass filter to provide a low frequency hydrophone output signal and to remove temperature induced signal distortion. A line driver and low cost twin lead transmission line provides the signal to the upper floatation electronic unit of the sonobuoy for conversion to the desired RF carrier frequency. In a single-channel sonobuoy, this signal is multiplied and amplified for transmission to a distant receiver. In a multi-channel sonobuoy, this signal acts as a reference frequency for the frequency synthesizer section of the sonobuoy transmitter.