FUSE FOR SMALL-CALIBRE SHOT Russian patent published in 2025 - IPC F42C1/04 

FIELD: weapons.

SUBSTANCE: invention relates to fuse for small-calibre shot. Fuse comprises housing accommodating ignition mechanism. Besides, it comprises safety mechanism of long-range arming consisting of spring-loaded slide gate equipped with detonating cap and retained in position shifted relative to fire chain by means of spring-loaded retainer resting on pyrotechnic stick and safety centrifugal mechanism. Besides, it comprises spacer mechanism consisting of three spacer rings. And also impact inertial mechanism. Spacer rings are connected into the unit by means of a tube pressed in the upper spacer ring and flared with support on a disk spring resting on the lower spacer ring. In the tube there is a sting equipped with an expelling charge, and holes are made. Upper and lower spacer rings are equipped with two pairs of oppositely located open annular channels, in one pair of which a pyrotechnic composition and transfer pyrotechnic columns are pressed. In the lower spacer ring, the transfer column is at the beginning of the channel, and in the upper spacer ring – at the end of the channel. Second pair of equal-depth channels is provided with recesses at opposite ends of the channels. Middle spacer ring on the radius of the pyrotechnic channels of the upper and lower spacer rings is equipped with a transfer pyrotechnic column. On the radius of the second pair of channels there is a hole with a cam arranged in it. Upper spacer ring is equipped with a locating mark and a slot located along the diameter. Middle and lower spacer rings are equipped with scales. On the lower spacer ring there is a thread. Safety mechanism of long-range arming is separated from the remote unit by a spring, and there is a hole in it for installation of a tube with a transfer pyrotechnic column, which connects the ignition mechanism with the beginning of the pyrotechnic channel in the lower distance ring.

EFFECT: enabling use of small-calibre shots to combat small-size unmanned aerial vehicles in the near zone.

1 cl, 7 dwg