Abstract: The method of preventing improper functioning of an armor piercing projectile having an axial hollow liner around which the explosive of the projectile is consolidated which comprises consolidating an axial pellet of explosive into the rearward portion of said liner.

Abstract: In combination: a geophone having a resonant frequency in the pressure wave band and a response that decreases with frequency below the resonant frequency; an amplifier connected to the geophone and having a gain which is substantially constant for frequencies above the resonant frequency, and which varies inversely with frequency for frequencies below the resonant frequency; a band-pass filter connected to the amplifier; a single channel rectifier connected to the band-pass filter; apparatus connected to the rectifier for obtaining short term and long term averages of the rectifier output; and apparatus including a comparator connectied to the last named apparatus for giving an output when the short term average exceeds the long term average by more than a predetermined amount.

Abstract: A fuze for firing the explosive charge of a projectile, comprising, in combination, a firing mechanism, including a firing pin, mounted resiliently in said projectile for rearward axial movement of the pin to fire the charge, a probe, including forward and rearward ends and an integral shear washer between the ends, mounted in the projectile with the forward end positioned to receive impact from media traversed by the projectile, with the rearward end slightly spaced forward of the firing mechanism, the washer normally preventing movement of the probe toward the mechanism, so that impact of the fuze with a rigid target shears the washer and enables the probe to engage the mechanism and thereby cause firing of the projectile.

Abstract: In combination: launching apparatus including a discharge tube having an open end and a closed end; a stack of bodies in end-to-end relation in the tube; a flexible tether extending in the tube from the outermost end of the stack past the innermost end thereof, the tether crossing the stack between each pair of the bodies; apparatus at the closed end of the tube for propelling the stack of bodies out of the tube at the open end; and apparatus securing one end of the tether to the launching apparatus in such a manner that the tether does not become taut until the stack has passed out of the tube.

Abstract: An optical system made up of vertically stacked omnidirectional modules, each having apposed reflectors, one being conical and the other being paraboloidal, and the modules being vertically spaced along an axis so that generally horizontal light from any direction is reflected by the surface in a desired sequence to a light responsive device.

Abstract: Apparatus for forming, from a generally conical billet, a hollow forging of desired wall thickness having a generally conical portion tapering to a smaller cylindrical extension, the inner and outer surfaces of the conical portion having minor predetermined and spatially related devisions from purely conical configurations, said apparatus comprising, in combination, a die having a concave conical configuration, with a cylindrical extension at the smaller end, to conform to the desired external configuration of said forging; a punch having a convex conical configuration to conform to the desired configuration of the inner surface of the conical portion of the forging; and means mounting the punch for movement coaxially into the die from the larger end thereof, to an extent which determines the wall thickness of the forging.

Abstract: In a wound capacitor, in combination: a capacitance roll including electrodes spaced by dielectric layers, the electrodes projecting separately to opposite ends of the roll; a pair of discs at the ends of the roll and shaped to conform with the ends of the roll, each disc having a first, roughened surface for intimately engaging the electrode at the end of the roll, and having a conductor extending generally axially away from a second surface thereof, each conductor having an offset spaced from the disc, and structure maintaining the discs in contact with the ends of the roll.

Abstract: In a wound capacitor, in combination: a capacitance roll including electrodes spaced by dielectric layers, the electrodes projecting separately to opposite ends of the roll; a pair of discs at the ends of the roll and shaped to conform with the ends of the roll, each disc having a first, roughened surface for intimately engaging the electrode at the end of the roll, and having a conductor extending generally axially away from a second surface thereof, each conductor having an offset spaced from the disc; a housing for the capacitor comprising a tube with end closures; and structure maintaining the discs in contact with the ends of the roll, including an insulating spacer between each disc and the adjacent end closure of the tube.

Abstract: An antenna comprising, in combination: a first nonconductive substrate; a conductive ground plane on one surface of the substrate; a plurality of conductive patches mutually spaced in an array extending over the other surface of the substrate; conductors for energizing said patches to comprise a first antenna with said ground plane; a second nonconductive substrate overlying said plurality of patches; a second plurality of conductive patches mutually spaced in a second array extending over the outer surface of the second substrate, and positioned in the spaces between the patches of the first array; and conductors for energizing the second plurality of patches to comprise a second antenna with said ground plane.

Abstract: A leak detector comprising a housing having an axis on first and second compartments spaced along the axis and hermetically separated by a partition, the first compartment being closed to comprise a pressure envelope which is in communication with an evacuated space to be monitored for leakage, an ionization cell in the first compartment providing an electrical current determined by gas in that compartment, hermetically sealed feed-through for enabling an electrical connection with the gauge, to the partition from the second compartment, an apparatus in the second compartment performing a control function in accordance with the current supplied by the cell.

Abstract: Apparatus for cleaning marine fouling material from a submerged surface, including a submersible unit movable along a submerged surface to be cleaned, and ultrasonic means carried by the unit and energizable to create a zone of cavitation at the surface, so that movement of the unit moves the zone along the surface to clean fouling material therefrom.

Abstract: An arrangement for improving the performance of Class D pulse width modulated amplifiers which comprises circuitry for short circuiting turns on the output transformer during intervals between pulses and thus enabling extended linear control of the power output of said amplifier and protecting the amplifier against transients fed back from a load connected thereto.

Abstract: Apparatus for use with a command-guided missile including: a beacon-receiver unit comprising a member having a patterned surface including a first area, which is retroreflective, and a second area, which is not retroreflective; apparatus causing rotation of the member about a spin axis passing through the surface; and focusing apparatus spaced on the member and having an optical axis passing through the surface, so that electromagnetic radiation reaching the focusing apparatus at an angle oblique to the optical axis is focused on the surface as an image which defines on the areas, as the member rotates, a closed curve about the spin axis, a characteristic of the closed curve varying with the oblique angle.

Abstract: Apparatus for dispensing mines of short, circularly cylindrical configuration about a spin axis, comprising, in combination, a housing having an opening, an arm mounted in the housing for angular movement about a first pivotal axis between first and second positions, a spring means actuating the arm toward the second position, drive mechanism operable to move the arm to, and releaseably hold the arm in, the first position, a cylindrical friction member arcuate about the first pivotal access from a site adjacent to the opening, and a holder mounted on the arm to receive a mine with its spin axis parallel to the pivotal axis and with its cylindrical surface in engagement with the friction member, so that when the arm is moved into the first position and released, a mine in the holder is propelled along said friction member and is ejected through the opening, while rotating about the spin access.

Abstract: A proximity monitor for movement at a selected distance from a surface, including a first microwave sensor having an antenna pattern directed toward the surface, the principal component of the pattern parallel to the surface being in the direction of the movement, a second microwave sensor having a second antenna pattern directed toward the surface, the principal component of the second pattern parallel to the surface being at a direction opposite to that of the movement, and the patterns being mutually spaced at the surface in the direction of movement, a magnetic anomaly sensor giving an output representative of the presence at the surface of a magnetic anomaly located between the patterns, and apparatus connected to the sensors for performing a control function when the signals from the sensors are above predetermined levels in a predetermined time relationship.

Abstract: A method of making a convolutely wound electrical capacitor which comprises performing half the winding in a first direction, then reversing the direction and completing the winding without allowing the first winding to unwind.

Abstract: A battery microcalorimeter comprising a thin sample container, a pair of heat sinks having faces apposed to the faces of the container, and a pair of thermopiles having first faces thermally engaging the faces of the container and second faces thermally engaging the faces of the heat sinks. The container is divided into separate chambers, one receiving the non-liquid elements of the battery cell, and the other receiving a heater with electrolyte. By tilting the container electrolyte is transferred between the chambers.

Abstract: An ultrasonic line sensor including an elongated transmission line for longitudinal pressure waves, which changes transmission characteristics with change in the length of the line due to transverse mechanical loading, and also including apparatus for energizing the line with longitudinal pressure waves at a long term frequency which establishes a standing wave in the line, and for responding to short-term changes in the natural frequency of the line.

Abstract: The method of performing an arming operation in a falling munition which comprises the steps of decelerating the munition, quickly converting a portion of the energy of deceleration to potential energy, and slowly utilizing the potential energy to perform the arming operation.

Abstract: A diaphragm operated pressure regulator having jointly operable principal and auxiliary springs, the auxiliary spring being readily exchangeable to vary the control characteristic of the regulator without affecting the maximum and minimum pressure adjustments of the regulator.