Патент USA US2405653код для вставки
Aug. 13, 1946. G. HQNGER FUSE FOR AUTOMATIC DESTRUCTION 0F SHELLS Filed May 27, 1941 lllllllllll_lllllll I7I. E5: \\\ % / PM./ V 4 2,405,653 2,405,653 Patented Aug. 13, 1946 UNITED STATES PATENT OFFICE 2,405,653 FUSE FOR AUTOMATIC DESTRUCTION OF ‘ SHELLS ' Guido Hiinger, Geneva, Switzerland Application May 2'1, 1941, Serial No. 395,466 In Switzerland July 9, 1940 2 Claims. 1 Various designs of fuses for projectiles have been evolved in recent years in connection with antiaircraft defense, in which a mechanism is (Cl. 102—71) 2 after a certain time explode automatically as will be shown. The angular velocity gradually decreasing while the projectile follows its trajectory, the centrif released when the angular velocity of the projec tile falls below a critical and assigned value, thus in ugal forces acting upon the weights [5 are no longer sufficient to balance the spring Hi; the tube allowing the striker to set off the detonator and I3 gradually glides backward, the nose of the produce automatic destruction of the shell. weights l5 reaches the end ll of the slanted sur The known fuses have the serious defect that; faces I6, the coil spring l4 acts unhampered on the critical angular velocity being but little infe the tube [3 which throws the striker l0 against rior to the initial velocity it is quite possible that the detonator it! thus producing the automatic this critical value may never be reached, for in destruction of the shell. stance in case of slightly defective propelling On the contrary, if during propulsion the criti charges. The result is a premature explosion of cal value of the angular velocity is not reached, the shell at the instant the linear acceleration 15 owing to a faulty loading of propellant for in vanishes, that is a foot or so from the gun. stance, the centrifugal forces exerted by the The present invention has for its object to weights I 5 will not suffice to pull the tube 13 for overcome this inconvenience. A premature ex ward. The centrifugal weights ll remain locked plosion which might otherwise result from an thereby keeping the striker l0 locked as well. Un insufficient propellent loading is prevented by a special mechanism. The transport safety device 20 der these conditions the shell may hit an obstacle, the ground in particular, without exploding. can free the other mechanism when and only when the velocity of rotation of the projectile I claim: 1. A sensitive percussion fuse for projectiles exceeds the just described critical velocity by a comprising a ‘fuse body, a detonator therein, a de?nite amount which may be chosen at will. This invention does not impair the desirable 25 striker having percussion means associated there qualities of the shells known up to date such as with, a tubular member coaxial with and sur safety in transport, high sensitivity of percussion, rounding the striker said member being axially ease of manufacture of large quantities, as well slidable in the fuse body, an internal shoulder on said tubular member, a spring within said as low cost. The ?gure illustrates an application of the 30 tubular member and abutting between said shoul der and the fuse body, centrifugally operated invention to such a fuse. During transport the transport safety means normally held by the in striker if] is secured. in the known manner by ner end of said tubular member in position sep centrifugal weights I I, kept in place by the light arating said striker from said detonator, means pressure of a leaf spring l2; under the pressure of a coil spring [4, a tube l3 locks the centrifugal to U! on said tubular member for driving the striker towards said detonator under the action of said weights ll; two cylindrical weights l5 with spring and having a one-way connection with rounded nose are free to move in appropriate the striker enabling the striker to move towards radial holes bored in a head l3a of the tube l3. the detonator without restraint from said tubu At the instant propulsion takes place, owing to inertia, the pressure of the lower end l3b of the 40 lar member, a head on said tubular member, cen trifugal weights of cylindrical form having tube l3 on the centrifugal weights H is increased rounded ends slidable radially in said head, and so that in spite of the centrifugal forces developed an internal conical ramp on the fuse body coop the safeties remain unaltered. erating with the rounded ends of said weights Not until the linear acceleration nearly stops to produce axial movement of said tubular mem can the centrifugal weights 1 5 begin to act. They ber, the centrifugal action of said weights being press against the slanting surfaces I6 of a sleeve predetermined to overcome said spring only above lBa forming a guide for the tube parts I3, l3a a critical angular velocity of the fuse. and gradually pull the tube I3 forward compress 2. A sensitive percussion fuse for projectiles ing the coil spring 14, thereby releasing the cen trifugal weights I l which move radially owing to 50 comprising a fuse body having a cylindrical axial bore therein of uniform diameter, a detona the rotation of the projectile and free the striker tor in said body, a guide sleeve lodged in said It. The shell is then armed and it will explode bore and having an internal ramp at its outer the instant it hits any part of the aircraft. end, a member with a head having radial cavities Should the projectile not encounter any ob stacle, it would follow its course undisturbed and 55 therein and a tubular stem both said head and 2,405,653 3 4 said stem being guided by said sleeve for sliding ing a one-way connection with the striker en axial movement of said member, an internal shoulder in said tubular stem, a spring within enabling the striker to move towards the detona said member said spring abutting at one end against said shoulder and at the other end against the fuse body, transport safety means within said centrifugal weights of cylindrical form having axial bore said means including centrifugal masses normally held by the inner end of said tubular stem in position separating said striker from said detonator, means on said tubular stem en gaging said striker to force it towards said det onator under the action of said spring and hav tor without restraint from said tubular member, rounded ends slidable in said radial cavities with the rounded ends engaging said internal ramp to produce axial movement of said member, the centrifugal action of said weights being prede termined to overcome said spring only above a 10 critical angular velocity of the fuse. GUIDO HéNGER.