LOCKING DEVICE Russian patent published in 1998 - IPC

FIELD: locking devices. SUBSTANCE: locking device has a key and an insert made coaxially; the key uses a cylindrical rod with a stud at the end, whose axis is perpendicular to the key axis, and the insert has a set of washers with shaped holes in the center, two covers one of which, on the side of key insertion, is made with a round-section hole and a radial slot. A set of knife edges of different sections is attached to the base of the key cylindrical rod behind the stud, aligned with it; the base of each, subsequent knife edge is inscribed in a circumference inscribed in the section of the previous knife edge and turned relative to each other through any angle, and the rod is rigidly fastened resting on the key spring, whose other end is spring loaded by the cup bottom closing the key end; on the side of key insertion the key cover is furnished with a cylindrical groove, whose radius is equal to the sum of the radius of the rod cylindrical part and the stud length, and is rigidly fastened around the edges to a flanged case, whose other end is rigidly fastened to the bottom; the insert uses a number of pairs of washers aligned with the key rod and corresponding to the quantity of the key knife edges; each pair of washers has a washer with a hole of a section of the knife edge corresponding to it and a washer following it with a hole of a section of this knife edge; the washers having the shape of the knife edges through spacers are rigidly screwed to a tail piece resting on the case bottom, and the washers with round holes are fastened by studs resting on springs in its middle part, the lower parts of the studs with the spring ends are sunk in the tail piece body, the recess in which serves as a device outlet for connection to the drive of the lock bar, and the upper parts through holes in the flanged case bottom are connected to contact pairs, whole leads serve as device outputs for connection to the alarm. EFFECT: enhanced reliability. 3 dwg