IL31541A - Projectile with electric ignition means - Google Patents

Description

Projectile with electric means ARAM This relates to a assembly comprising a projectile and its launching According te the present invention there is provided a ballistic assembly comprising a projectile and its launching apparatus wherein the projectile provided with a tail in which is force fitted a a propellent charge located in a region of said closed by piston and wherein said launching apparatus comprising a guide rod insertable in eaid tubular as te bear the and electrical ignition at least partly located said piston and an electrical conductor located in said rod and adapted to said ignition means with an external current accompan figures by way of one embodiment of the assembly acoording te the in the pro ectile is illustrated as a 1 a partially axial elevation of the assembly at the onset of 2 a partially sectioned axial elevation just after when the projectile has lef the guide rod which forms part of the launching is an axlally on an enlarged of a part of the assembly in 1 showing in detail the of of the propellent The ballistic assembly eomprises a projectile consisting of a head 1 screwed on to an externally threaded closed end portion a tubular tail 2 whose rear opposite end carries fins 2b held in position by a retaining charge of explosive material 4 is placed in the 2a of the 2 and is retained in position by a piston 5 made of metal in the tubular tail the rear end thereof and before the retaining ring 3 had been put in The pressure with which the introduced may advantageously he of 400 to 800 The apparent volume of the explosive charge into account the interstices between the grains of the thus entirely fills space comprised the rear wall of the closed end and the piston An axial is formed in the piston the rear part of which there is fixed a socket of electrically insulating material the front end of which screwed to a cylindrical brass stud 7 pushing against an insulating button 6 which hermetically seals the front end of axial Passing through the button Θ is the t ail of a brass capsule containing the powdered priming charge and a metallic incandescent Most of the body of the capsule located in a stool ring 10 while its tail 9a screwed into the brass stud In rear part of the bore of insulating socket there is ixed a cylindrical brass contact 11 biased by a spiral spring 12 so that its head projects slightly beyond the rear wall of the piston 5 which wall constitutes the base of a cylindrical cavity formed in the this cylindrical in the roar of the piston firing of the propellent the front end of a steel guide rod having a head provided with a thread enabling to be screwed into a tapped support being part of a launching apparatus or to be into the of any fire in the frontend this guide rod 13 there is provided a hollow lined with an insulating cap to the bottom of which is adhesively secured a contact 15 of An electric front of is soldered plug to the contaet 15 is located in a longitudinal groove formed along the length of the red lined with insulating material and through a towards axis of the rod and lined with an insulating tube with the hollow eavity the contact a The rear end of the wire passes through the head in a axial lined with an insulating tube and is pressed against the inner wall ef a hollow contact stud fixed in an insulating sleeve by a tightening screw which screwed into the contact stud 28 connected by a wire 25 te the positive terminal ef a current source 25 while the head 13a connected by a wire 24 te the negative terminal ef the source 25 via a switch She red 13 is centred the guiding ef the tail on the one hand by the ef the retaining ring and on the ether hand by the rear housing ef the piston into which it In another which is the retaining ring 3 nay be omitted a nd the red 13 now ef a diameter only slightly smaller than that ef piston is aligned directly by the tail 2 by virtue ef its sliding freely The operation of this ballistic assembly is as When the components are in the position represented by 1 before the launching ef the is sufficient to close switch 26 in order to establish the electric plug current between the contact s and the contact point and te bring contained the primary capsule to incandescence thus firing the which in its turn ignites the propellent charge which upon exploding exerts a considerable instantaneous pressure en the piston 5 which bears against the to the limit of elasticity of foil the piston 5 which been inside the tabular tail 2 is dislodged and foreed in a rearwards direction against end of the guide rod As a result the projectile is projected forwards along the arrow while the piston 5 thrust against the front end of the rod 13 and when the tail 2 leaves the guide rod 13 the piston 5 is retained by the retaining ring 3 at the rear end of the tail the length of the tail 2 is so chosen that the acceleration of the projectile relative to the guide rod 13 is practically terminated at the instant the tail leaves the This time ef acceleration corresponds to the time required for practically total combustion of the explosive charge insufficientOCRQuality

Claims (1)

1. In ballistic device a projectile and a a sealed in the tube by means o a the launcher comprising a guide rod that extends forwardly into the and hears against the rear of the and electrical ignition means for the launching ehargsj the improvement in which the piston is force fitted into the an ignition capsule disposed at least in part in a recess of the piston adjacent the charge with a shoulder of the capsule resting o the bottom of the socket the piston having an axial a of insulating material disposed in the conductor means socket extending along the piston and through said insulating and electrically interconnecting a source of electricity in said ignition capsule to ignite a primer in said capsule when said conductor is electrically said guide rod having a recess in forward insulating material lining the said conducto means comprising a conductive metal plug disposed in said recess and surrounded by said insulating and electrically conductive means extending through said insulating pin and release electrically contacting said plug for connecting said plug electrically with said primer when the rear of the piston hears against the forward end of said guide A ballistic device as claimed in Claim the mentioned said recess being disposed on the axis of said piston an opening in an axial direction away from said guide 7 A ballistic as in Claim said socket means extending said insulating means socket disposed in the and spring means urging said slldably disposed means against and electrical contact with said A ballistic as claimed Claim said conductor including an wire extending wise within hut insulated from said guide A ballistic device as claimed in Claim said conductor means including an incandescent wire in contact with said A ballistic device as claimed in Claim in which said wire is disposed in a longitudinal groove in said guide said groove lined with insulating A ballistic device as claimed in Claim said wire extending from said groove through a passageway directed inwardly toward axis of the guide rod and being electrically secured to a contact disposed of but electrically insulated the rear end of guide A ballistic device as in said wire extending inwardly from said groove toward the axis of said guide rod at the forward end of said guide rod and being in electrical contact with a plug that is disposed in but electrically insulated from the forward end of said guide For the Applicants ARB PARTNERS insufficientOCRQuality