GB1301999A - - Google Patents

Abstract

1301999 Projectile fuzes WERKZEUG MASCHINENFABRIK OERLIKENBUHRLE AG 22 June 1971 [26 June 1970] 29085/71 Heading F3A An impact fuze for a spin-stabilized projectile which can be set for direct and delayed action comprises a stud 36, Fig. 1, that sets back upon axial acceleration to enable a detonator pallet 22 to rotate into an armedposition under the action of a spring 29, lines extending from the centre of gravity S, Fig. 5, of the pallet through the axis of rotation D of the pallet and the spin axis A of the fuze defining an acute angle α, whereby the tangential component T 1 of the inertial force F 1 arising from the spin acceleration, opposes the thrust of spring 29 as well as the centrifugal force Z 1 acting on the pallet so that the contact pressure between the stud 36 and the pallet 22 is thus reduced, permitting the stud to set back reliably without jamming. Movement of the pallet into the armed position is delayed by means of an escapement mechanism co-operating with a toothed quadrant 38, Fig. 2, of the pallet. The pallet carries two detonators 56 and 66, Fig. 2, which in the armed position are respectively aligned with a striker 46, Fig. 4, beneath the pallet, and a striker 15 above the pallet. The striker 46, Fig. 4, is locked against the action of a spring 44 by balls 49. Axially displaceable sleeves 42 and 51 surround the striker. To set the fuze for direct action, a key 57, Fig. 1, is rotated so that the striker 15 is free to pass through an aperture 59. Upon firing, the striker 15 sets back into a recess 62 in the pallet, the pallet also sets back firmly against a face 13, and the stud 36 sets back to unlock the rotor. When the acceleration ceases, the striker vacates the recess 62, and the pallet moves forwards again under the action of spring 29 and subsequently rotates, with delay, into the armed position. At impact the striker 15 is driven into the corresponding detonator. To set the fuze for delay action, the key 57 is rotated so that the striker 15 cannot set back, Fig. la. Upon firing, the arming action is otherwise as before. At impact, the sleeves 42 and 51, Fig. 4, are thrown forwards, but the spring 44 returns the sleeve 42 to its original position and the balls 49 enter the gap created between the two sleeves, thus enabling the spring to drive the striker into the corresponding detonator 56. The flash from the detonator passes beneath the pallet to a relay.