MULTIPLE-COCKING SAFETY MECHANISM Russian patent published in 2021 - IPC F42C15/40 F42C11/04 

FIELD: blasting.

SUBSTANCE: invention relates to military equipment, namely to safety mechanisms applied in pyrotechnics used in missiles for various purposes for starting solid fuel engines, gas generators, for separating aggregates. The mechanisms can also be used in various explosive apparatuses cocked by electrical command. The safety mechanism is comprised of a body with a top cover made of a diamagnetic material and a bottom cover made of a ferromagnetic material, wherein a plate with holes and a clapper with a permanent magnet is installed, made in form of a freely rotating rotor with firing channels. The channels in the rotor and the holes in the plate are arranged so as not to be aligned with each other in the servicing position of the mechanism and to match in the cocked position, forming a single channel for the explosive train between the initiator and the charge. The channels at the outlet of the rotor are made at an acute angle to each other and are directed towards the charge with the narrowing area. A magnetic circuit in form of two pairs of diagonally located electromagnets with protruding cores is also located in the body. The windings of the electromagnets of each pair are interconnected forming an electrical circuit. The axes of the electromagnets are parallel to the axis of rotation of the clapper and are equidistant therefrom. The safety mechanism includes a cocking and return control apparatus in form of two sealed switches interacting with a permanent magnet and located at different poles thereof. The permanent magnet in end positions abuts the cores of one of the pairs of electromagnets, fixing the mechanism in the cocked or servicing position.

EFFECT: increased indicators of reliability, safety and vibropercussion load resistance without an increase in total dimensions of the mechanism.

2 cl, 7 dwg