Abstract: A drogue parachute deployment system for an ejection seat comprises a dro parachute mounted in a bag on the seat, a rocket motor, and a tow line attached between the parachute and the rocket motor. Upon firing of the rocket motor, the bag is caused to rip and the parachute is deployed.

Abstract: A waveform generator particularly suited for the simulation of Doppler ra returns from precipitation is provided. Also, waveform pattern selected capability is provided and spectral shapes such as Gaussian distributions, symmetrical and asymmetrical bimodal spectral shapes or flat spectra can be chosen and generated. The device is portable and capable of being used in the field.

Abstract: There is disclosed an explosive device consisting of a thin-walled metal ing whose cross section consists of identical V-shaped sectors, which are joined to each other by means of a soldered butt connection. Because of a relatively small radius and weaker structure at the joint than at the V-intersection, separation upon explosion occurs at the solder joint first, yielding a fragment that provides greater penetration power over a wider range of stand-off distance.

Abstract: The disclosed valve assembly permits the automatic scuttling, or sinking, floatable pressure vessels or other containers, and comprises an extensible, spring-restrained nozzle containing a spring-biased ball seal within a flow passage. Vessel internal pressure extends the nozzle from a retracted position to expose the exterior end of the flow passage. A calibrated restraining spring ring maintains the nozzle retracted and in the extended position during pressure vessel operation. The ball seal is displaced from a nonsealing position against a ball seat to preclude pressure relief through the flow passage. After exhaustion of internal pressure, the bias spring and external water pressure force the ball seal from the ball seat to permit water entry and subsequent sinking of the vessel.

Abstract: An electrically variable surface acoustic wave phase shifter including a strate upon which a piezoelectric layer is deposited and separated therefrom by an insulating layer. An electrode is deposited on the piezoelectric layer and on the bottom of the substrate with an electrical dc bias applied onto the electrodes which causes a charge accumulation or a depletion region at the silicon surface. This charge accumulation or depletion region causes the boundary conditions to change therefore causing a phase change in an acoustical wave propagating along the layered silicon surface.

Abstract: An electrostatic discharge system for neutralizing the charge accumulated an aircraft utilizes a pair of unequal length probes to sense the intensity of the external electric field. A transformer arrangement energizes these probes with out-of-phase voltages such that the corona currents flow in opposite directions through these probes. The dual probe configuration eliminates any errors due to environmental changes, while the out-of-phase excitation mode allows the AC component of the output signal to be canceled at a load resistor in the sensor circuit by a subtractive process, a feature which greatly simplifies the filtering operation.

Abstract: A deep drawn cap for protecting the fuze in a projectile which fits over fuze and is retained in place by an E clip. An O ring provides a weather tight seal between the cap and the projectile.

Abstract: An explosive device comprising a plurality of serially spaced shaped char with a flat metal washer at the base of each upper charge which washer is propelled across an annular space, at a known velocity, to impact and thereby initiate the explosive charge driving the next jet in sequence. A metal shield down the center of the charge provides a channel for passage of the jets generated and also, said shield by collapsing under the action of the explosive, propels a particular washer associated therewith and clips off the slow non-penetrating end of each jet, minimizing the required time delay between jets.

Abstract: A portable decompression computer, which is capable of providing a diver's current depth and safe-ascent depth, comprising a source of energy, for energizing various components of the computer. A micro processor is energized by the energy source. A clock generator times various components of the computer. A bus driver and status latch, timed by the clock generator and connected to the micro processor, decodes data signals received at its input and converts them to compatible voltage levels as output signals. The status latch decodes information from the micro processor and relays it to various memory input and output devices. A read-only memory (ROM), which has the main programs for the computer stored within it, can be addressed programmatically by the micro processor. A first random-access memory (RAM), connected to the micro processor, can write data into and be read by the bus driver and status latch, the memory storing the program variables.

Abstract: A radar receiver employing digital signal processing utilizes high-speed ut buffers in the form of charge coupled devices that lower the data rate to the analog-to-digital converters so as to reduce their response requirements and, thereby, their cost while still permitting the system to achieve a high degree of range resolution.

Abstract: An automated radar data processing system comprised of signal processing cuitry and programmed general purpose digital computer apparatus performs detection, classification and tracking of all targets within the field of view of the radar. The signal processing circuitry includes an adaptive video processor which receives the raw radar video signals and which derives a threshold from the noise, clutter, or electronic countermeasures signals in the immediate vicinity of the target and passes only those incoming signals which satisfy the detection criteria in terms of signal to noise ratio and extent. The signal processing circuitry is interactive with target track data derived and stored in the computer apparatus, so that the specific signal processing applied to any target by the adaptive video processor is optimized in accordance with the track status of that target.

Abstract: 1. A channel defining system for aiding the navigation through a body of er of a vessel equipped with a high resolution pulsed catacoustic system adapted to scan the bottom in range abeam of the vessel comprisingAn elongated buoyant ridge-like strip of acoustic reflecting material extending lengthwise of the channel on the channel bottom and laterally spaced from the center line of the channel by a substantially constant known distance, andAnchoring weights secured to said strip at spaced positions along its length.

Abstract: Thermocouples are fabricated by painting lines of two dissimilar thermal-ment materials on a non-conducting substrate such that the painted lines intersect at the location where temperature is to be measured. Alternatively the paint may be thinned to the consistancy of ink and used in a printing process. Thermocouples may be thus formed on paper, cloth or plastic surfaces, for example.

Abstract: An air launched weapon having wrap-around fins wherein the fins are provi with fences, slots and roll tabs to stabilize the roll-rate at all angles of attack.

Abstract: A dual-motion firing device having both its firing and its arming mechani internal to its tubular housing. A tubular sear is enclosed by the housing and, in turn, encloses an arming rod, both sear and rod extending out of the housing. A tubular firing pin capped and nippled on its forward end encloses the front end of the sear. Pushing the arming rod forward releases a ball which restrains the sear from rearward movement. Then, pulling the sear backward releases another ball which prevents forward motion of the firing pin and a spring propels the latter forward sharply.

Abstract: A system for generating electrical power comprising a stator in combination ith an air driven turbine type rotor of annular shape and supported for rotation on an outer surface of the unit to which power is to be supplied. Aerodynamically responsive fins on the annulus ring when exposed to the air flow, rotate the annulus. Magnets in the annulus are separated from stationary stator coils embedded in the unit to generate alternating current.

Abstract: A modulated signal is injected into receiver under test. The output of the eceiver is fed directly to a first power measuring device and through a digital filter to a second measuring device. The two measured quantities are fed to a divider circuit which provides an output proportional to signal to signal and noise ratio.

Abstract: An array of circular, acoustic projecting and receiving transducers is deibed, including a stainless steel baffle plate in which the transducers are mounted, each comprising a stainless steel cup containing a disc-shaped piezoelectric element set in low impedance material and covered by a water impedance matching window. Capacitive and inductive tuning means is provided between each receiving transducer and its associated electronics.

Abstract: A high energy laser mirror formed from a single block of nickel and having secondary coolant circuit for promoting low distortion is provided. Parallel slots of alternating and selected depth are machined in the block and connected to manifolds drilled so as to direct flow of coolant in opposite direction in adjacent slots. The ends and tops of the slots are closed by electrodeposition of nickel, completing a structure which is thermally stable at levels of operation requiring the absorption of several kilowatts of power.

Abstract: A method for combining a curing agent with an epoxide resin which compris (a) heating a normally solid non-adulterated aromatic polyamine to a temperature above its melting point, (b) slowly cooling the melted aromatic polyamine to room temperature to form a stable supercooled liquid and (c) mixing the supercooled liquid with the expoxide resin.