LOCKING DEVICE Russian patent published in 1998 - IPC

FIELD: mechanical engineering. SUBSTANCE: this can be used as rim lock for doors of dwelling and service premises, gates, etc. It is very advantageous for sliding and rolling doors, and also for turning doors which are made up of two halves. Device has turnable handle installed in door or in its half, span-piece made in the form of lever with its one end rigidly secured on axle of handle. Other end of lever at turning of handle axle is moving over curved line, and in its working position it extends to second half or frame of door and enters top-open slot of rest installed on it. Also provided are lock and means for fixing span-piece in working position. This means is actuated by locking mechanism. Rigidly secured on handle axle is cam having cone-shaped slots in its outer edge. Locking mechanism is made in the form of two parallel spring-loaded slide members having cone-shaped ends which correspond to slots in cam. In working position they enter slots and prevent turning of cam. Slide members have slots in sides which face each other. Slots have surfaces which are inclined at acute angle to longitudinal plane. Slide members are moved by pressure key inserted into key slot between slide members. Sides of key are provided with protrusions which correspond to slots made in sides of slide members. Protrusions enter aforesaid slots at right angle and move slide members at sliding along inclined surfaces. Lever-type span-piece is made in the form of hook with its bent-off end embracing outer side of rest when lever enters its slot. EFFECT: higher efficiency. 2 cl, 3 dwg