CLOSING DEVICE FOR METAL DOOR Russian patent published in 2002 - IPC

FIELD: construction, applicable for servicing of living rooms and offices. SUBSTANCE: the closing device has sliding cross-bars located around the edges of the metal door wind, mechanism for shifting the cross-bars to the closing position and back comprising an inner rotary handle, transducer of turning of the inner handle to the reciprocating motion, and tie-rods, whose one ends are connected to the outlet links of the mentioned transducer and the others are kinematically linked with the crossbars, and an interlocking means of the closing device controlled from the external side. The mechanism for shifting the cross-bars is provided with an external rotary handle, transducer of turning of the external handle to the reciprocating motion and controlled from the door inner side by a sleeve connecting the external and inner handles. The closing device interlocking means is engageable with the outlet link of the transducer of turning of the external handle to the reciprocating motion. EFFECT: enhanced protection against unauthorized access. 9 cl, 8 dwg _