Zünder für Raketengeschosse

900,041. Ammunition fuzes. VERWALTUNGSGESELLSCHAFT DER WERKZEUGMASCHINENFABRIK OERLIKON. March 26, 1959 [March 28, 1958], No. 10547/59. Class 9 (1). A fuze S for a rocket projectile comprises a base part 1 housing a booster charge 4, a body part 2 in which is mounted a rotor 7 and a relay 6 and a cover part 3 enclosing an inertia mass 11 and a safety device 12, which provides the means for initiating a primer housed in the rotor. During transport the rotor is so held by the device 12 that the primer is screened from the relay 6 and when the fuze S is mounted in a hollow charge, as in Fig. 5, a flash passage extends through the device 12 to transmit flame from a percussion fuze 30. If the fuze S is to be fitted in the nose of a projectile, a firing pin 35 extends through the safety device, Fig. 9. In the spring-driven rotor 7, are two recesses separated by a nose 7p which is undercut by a groove, so that in certain circumstances a flange 14d on the sleeve 14 of the safety device can enter one recess from the other to allow movement of the rotor. The two telescoping sleeves 13, 14 composing the safety device are held apart by a spring 15 which thrusts sleeve 13 against an apertured plate 11b closing a longitudinal groove in the body 11. The groove, in addition to housing the device 12, contains a braking device comprising a rocker 17 engaging a rack 14e on the device 12 and carried by a pinion forming part of a gear train 18 to 25. On firing the projectile the body 11 sets back due to the acceleration of the shell and pulses the sleeve 13 rearwardly, thereby stressing the spring 16. The rack 14e braked by the gear train regulates the rearward motion. The flange 14d, when it gets below the level of the nose 7p, frees the rotor, which is then rotated by its spring until the flange 14d impinges on the wall of the second recess in the rotor and prevents further rotation. When acceleration of the rocket ceases, the spring 16 returns the safety device 12 to its original position, the motion being again regulated by the gear train. When the flange 14d has cleared the edge 7r of the rotor, the rotor rotates until a stop face thereon abuts the flange 14d, the primer then being aligned with the passage through the device 12 (or the firing pin 35 of Fig. 9) and the relay 6, so that the fuze is armed for operation on impact of the projectile on the target.