| 摘要 |
protection of dwelling houses and production and service rooms. SUBSTANCE: device is mounted on door from inner side of room and it has lock with keyhole accessible from outside through clearance between door and door box when door is locked. Device has also fixed member and movable members connected with fixed member by axles. Movable members are essentially levers which are automatically returned into initial fixed position by means of springs in non-operating position. Lockable member is automatically locked in fixed body of lock by means of catch when door is closed. Lock coupled with lock mechanism provided with keyhole from outer side of door engages with step on member and holds the member stationary, thus holding the door shut. To open the door fully, lockable member should be released from catch from inner side of room by means of key extension handle or through keyhole by means of key. To open the door partially, lock step should be disengaged from catch by means of key through keyhole from outside of room or manually from inner side of room. Handle can be used from inner side of room to shift T-shaped end piece in slot of member, than handle should be turned through 90 degrees and fixed on holder as necessary. This procedure can be used for slightly opening the door or holding it shut-without possibility of opening from outside. EFFECT: improved convenience in use. 2 cl, 4 dwg |
