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A deadlocking latch bolt in a tubular housing is connected to a tailpiece front cross head having a retainer arm in a radial window in the bolt and a blocker arm abutting the opposite housing side to maintain the connection. A deadlocking tumbler is biased to bolt deadlocking position. An auxiliary

A deadlocking latch bolt in a tubular housing is connected to a tailpiece front cross head having a retainer arm in a radial window in the bolt and a blocker arm abutting the opposite housing side to maintain the connection. A deadlocking tumbler is biased to bolt deadlocking position. An auxiliary bolt, when projected, holds the tumbler in release position, and when retracted relative to the bolt, allows the tumbler to take deadlocking position. A channel-shaped tailpiece cam member engaged for linear movement with the cross head has a cam face presented to move the tumbler to release position when the deadlocked bolt is drawn rearward by the tailpiece. The bolt is movable relative to the tailpiece when thrust rearward so as to be deadlocked against the tumbler before actuating the tailpiece and its cam member, but has no lost motion when pulled rearward by the tailpiece. A rear guide block in the housing forms a guideway with a side entrance for admitting a narrow tailpiece portion thereto, and is self-sustained on the tailpiece when moved rearward against a tailpiece stop. Bolt springs and the tumbler are assembled between the guide block and the bolts on the tailpiece to form a self-sustained subassembly slidably insertable in the housing.

대표청구항 ▼

Deadlocking latch bolt mechanism, comprising a tubular housing adapted to be mounted in the edge of a door, a latch bolt slidable in the housing between projected and retracted positions and having a rearward skirt portion defining a radial window and an opposite slot, a deadlocking tumbler movable

Deadlocking latch bolt mechanism, comprising a tubular housing adapted to be mounted in the edge of a door, a latch bolt slidable in the housing between projected and retracted positions and having a rearward skirt portion defining a radial window and an opposite slot, a deadlocking tumbler movable between deadlocking and release positions, an auxiliary bolt for controlling the position of the deadlocking tumbler, a tailpiece having a rearward portion adapted to be drawn rearward by retraction means, said mechanism also including the improvement comprising a cross head on the tailpiece having a retractor arm engaged in the radial window of the latch bolt for retracting such bolt, a tailpiece cam member slidably mounted in the latch bolt and having a side wall containing a window aligned with said latch bolt window, said cross head retractor arm being engaged in such side wall window so as to move the cam member rearward when the tailpiece is drawn rearward by the retractor means, and cam means acting between the cam member and tumbler for moving the tumbler from deadlocking position to release position in response to such rearward movement of the cam member by such rearward drawn movement of the tailpiece.