RECEIVING DEVICE FOR INITIATOR OF A MODULAR PROPELLANT CHARGE WITH CONTACTLESS IGNITION Russian patent published in 2021 - IPC F42C19/85 

FIELD: explosives engineering.

SUBSTANCE: invention relates to explosives engineering, to receiving devices of the initiator for a propellant charge in the barrel chamber of an artillery gun for caseless ammunition. The receiving device for the initiator of a modular propellant charge with contactless ignition contains a control power supply unit and a source of electromagnetic radiation of the ultra-high frequency (UHF) range attached to the gun carriage, connected by means of a feeder path and a coaxial waveguide placed in the gate channel to a radiating device located in the gun chamber, and initiators placed in the propellant charge. Each initiator is located radially in the modular propellant charge, relatively to the axis of the modular propellant charge, and is equipped with a receiving device that converts electromagnetic energy into thermal energy. The receiving device consists of a slotted metal antenna made of a conductive foil on a flexible dielectric substrate, a radiating slot located along the slotted metal antenna, an ignition unit representing a contact pad and incandescent filaments installed in the slot perpendicular to its axis, enclosed in a holder and filled with a pyrotechnic composition. The pyrotechnic composition ignites when they are heated creating a fire effect on the igniter of the smoky gunpowder, which in turn evenly ignites the propellant charge. An efficient power transfer to a low-resistance load – the incandescent filament – is provided. The receiving device allows one to position the initiator perpendicular-radially relatively to the axis of the modular propellant charge with the removal of the slotted metal antenna of the receiving device from the igniter influence, while the igniter is located above the ignition node. The incandescent filament is made in the form of two wires made of a resistive alloy.

EFFECT: an increase in the sensitivity of the receiving device and stabilization of the ballistic characteristics of the propellant ammunition.

4 cl, 6 dwg