Abstract: Shell for sporting cartridge of plastic material, fabricated in two parts, namely an extruded cylindrical case and a moulded cap containing base, assembled by welding, characterized by the fact that aforesaid case is provided with a conical part at one end, whereas the base is provided with a corresponding conical seat for the purpose of receiving aforesaid conical extremity of the case, the conical surfaces in contact with each other being made integral by an area of continuous welding.

Abstract: An explosive structure of the fragmentation type has a plurality of elongated fragments which are effective against armored targets. The explosive structure has a wall portion extending alongside an explosive charge, the wall portion comprising a plurality of the elongated fragments. The fragments have first and second elongated members or legs which are connected at one end by means permitting rotation of the members from a diverged configuration to an aligned configuration. When in the aligned configuration, the articulated fragment structures are adapted to attain stable, axial flight.

Abstract: 1. A method of decreasing the deleterious effects of cavitation on a ship propeller comprising providing a propeller having supercavitating blade sections, rotating said propeller to drive said ship, and ejecting air from the suction side of each said blade when said ship speed and propeller speed reach a predetermined point to thereby produce a cavity which extends from the leading edge to a point in the water beyond the trailing edge of said blade and envelops the entire suction side of said blade.

Abstract: 1. A method for determining the sound generated by a submarine propeller by esting a model submarine in a wind tunnel comprising the steps of:placing said model submarine containing a propeller in an air stream;rotating the propeller of said submarine model,measuring the sound generated by the model submarine.

Abstract: A plurality of discarding type segmented sabots are peripherally disposed rcumambient to the longitudinal axis of a subcaliber projectile to support the subcaliber projectile during launch. A prestressed notched bourrelet flange member screwedly attached to the forward sections of the sabot segments holds the sabot-projectile assembly together during launch. An aft bourrelet-obturator-slip ring assembly secures the rear sections of the sabot segments while transmitting only part of the rifling induced spin to the projectile. A self-adhering flexible base seal member is positioned in the aft end of the sabot segments to enhance efficient obturation of the propellant gases.

Abstract: A shaped charge device for a projectile has a nested structure which provs a relatively long lethal jet. The device employs a body of explosive material having a hollow formed therein. A sheath formed of ductile material is mounted within that hollow. Coaxially mounted within the sheath is an elongated casing. The casing which is formed of ductile material is spaced from the sheath. A layer of material is interposed between the sheath and casing. Upon detonation of the body of explosive material, the casing violently collapses to form a lethal jet.

Abstract: A connector block for mounting a blasting cap and detonating cord in intimate side-by-side association and having an elongated body with a longitudinally extending slot for receiving a signal transmitting shock tube and an elongated cavity for receiving the blasting cap above the shock tube, a knob chock on the forward end of the body for receiving a loop of the flexible tube and a pair of opposed upstanding cleat extensions for receiving a detonating cord and connecting a free end of the detonating cord to the connector block.

Abstract: A beam projector which is controlled to alternately transmit rectangular cross-sectional beams substantially parallel to a projection axis, wherein the beams are respectively pulse modulated over a correspondingly distinct pulse rate frequency range to supply yaw and pitch information and are respectively scanned in a direction correspondingly orthogonal to its cross-sectional length. The size format of the beam cross-sections and the angle of the scan are controlled according to a predetermined time variable function. In a first time period, the largest cross-sectional beams are alternately transmitted and the scan angle is decreased as a function of time, so that a fixed area of detectable information is available for detection with respect to an imaginary orthogonal reference plane moving along the projection axis at a rate corresponding to the predetermined time variable function.

Abstract: 1. A method of constructing an electronic device comprising the following steps:processing at least a portion of a first component of said device in a first chamber having an environment free of contaminants harmful to the processed portion;locating a second component of said device in a second chamber, separated from said first chamber by a barrier, and having an environment which may contain said harmful contaminants;protectively covering said processed portion of said first component;breaking said barrier between said chambers;and removing said protective cover from said processed portion during assembly of said first and second components without substantially exposing said processed surface of said first component to said second environment.

Abstract: Boundary layer transition is delayed on a re-entry vehicle by making use of the differential pressure that normally exists between the surface of a re-entry vehicle and the base region of the vehicle. Choked flow orifices are provided on the surface of the vehicle at the input to the internal ducting leading to the base region of the vehicle.

Abstract: 1. A system for coding optical images comprising, in combination, first and second geometric arrays of light-conducting elements, similar elements of each array being scrambled in a random fashion such that the respective ends of these conductors occupy different relative positions at both ends of the array, said arrays being coupled end to end, and means for varying the position of one of said arrays with respect to the other whereby an image passing through said arrays is subjected to different coding in each of said arrays.

Abstract: Apparatus for severing tubing along a generally transverse plane through the tubing wall, and including two confined explosive charges aligned axially with the tubing wall and terminating at opposed, proximal ends facing each other across a space disposed in such transverse plane. A portion of the opposed ends of the charges can contact each other, provided the main bodies of the two charges are spaced at the location of the plane of desired severance. Detonation devices are disposed at the distal or remote ends of the charges for originating detonation of the charges at such distal ends.The apparatus is employed by emplacing the confined charges in the tubing to be severed with the charges positioned on opposite sides of, and terminating with their proximal ends substantially at, the plane in which the desired severance is to be effected.

Abstract: A system which disperses a payload sequentially. The payload may consist of a number of discrete individual units or a long string of units. The illustrated and described embodiment of the system is utilized in a rocket for dispersing decoy material, such as aluminum chaff, in a sequential burst pattern. The concept may readily be applied to mortor type decoy rounds, other types of decoy material, or to other types of applications requiring a sequential dispersion of the payload thereof.

Abstract: The invention relates to a flat storable blast hole liner of the type used for lining blast holes in the mining industry. The liner has a pocket arrangement at its lower end for holding weighting material, the weighted pocket facilitating insertion of the liner, when empty of explosive, into a blast hole. The pocket arrangement comprises two pockets at the bottom of the liner and on opposite sides thereof, either of which may be filled with weighting material. The weighted pocket provides the liner with a generally rounded, bullet-shaped lower end. As the liner is lowered into a blast hole, the pointedness of the lower end tends to center the liner in the hole. Upon reaching the bottom of the hole the weighted pocket sags to one side of the hole and thereby allows later added explosive material to be received at the very bottom of the hole.

Abstract: A hollow charge ammunition particularly for dispersive weapons comprises a hollow charge having a forward end face with a recess and with a barb-forming liner in the recess overlying the end face. A folded member, such as a bellows-like structure is disposed in the recess and extends across the end face and it is unfoldable into an aerodynamically-formed stable structure extending outwardly forwardly of the recess. The device includes means such as a compressed gas for unfolding the member into the outwardly extending position at which it forms an aerodynamic surface.

Abstract: In small caliber ammunition, an explosive train for igniting the main prolant charge within the cartridge, said explosive train comprising a shock-sensitive percussion primer and a shock-resistant booster charge. The booster charge is formed as a single annular pellet coaxially aligned with the primer. The primer generates a jet of flame through the central hole in the booster pellet, thereby igniting the pellet to a self-heated condition sufficient to ignite the main propellant charge.

Abstract: A delay actuated explosive device for use in boreholes filled with high explosives is provided which comprises an explosive container having a detonator cord receiving conduit attached to the periphery thereof and a detonator receiving well which is offset from the detonator cord receiving conduit so as to avoid premature detonation. A detonator delay unit having an initiating means communicating with a delay detonator means is provided for use with the explosive container, the detonator delay unit being adapted such that the initiating means can be positioned proximate to the detonator cord conduit when the delay detonator means is positioned within the detonator receiving well of the explosive container.

Abstract: Mild detonating cord confinement, particularly of the type including a metal covered mild detonating fuse as an inner core. The invention is directed to reducing cord diameter and weight, while totally confining explosive effects. The reduction in weight and diameter is achieved by employing a plurality of different coverings for the mild detonating fuse inner core, notably an extruded plastic jacket, a plurality of plastic fiber overbraid coverings and a stainless steel overbraid encircling the plastic fiber as an overbraid. A foamed polyethylene may be employed as the extruded plastic jacket.

Abstract: A system which disperses a payload in a sequential manner. The payload may consist of a number of discrete individual payload units which are composed of two or more sections. The illustrated and described embodiment of the system is utilized in a rocket for dispersing decoy material, such as aluminum chaff, in a sequential burst pattern so as to produce a more uniform, widespread distribution of the decoy material. This is accomplished by sequential bursts of each unit which throw outwardly the payload sections of each unit, whereafter each of the payload sections are exploded. This concept may readily be applied to mortor type decoy rounds, other types of decoy material, or to other types of applications, requiring a sequential dispersion of the payload thereof.

Abstract: An explosive fusecord comprising a core of explosive material surrounded by at least two layers of wrapping material, two adjacent layers being bonded together by an intermediate layer of waterproof hot-melt adhesive material which is preferably a blend of polymeric film former and a tackifying resin. The fusecord is especially useful as an energy source for seismic prospecting .