TILT-LATCH WITH BOLT STOP

摘要

A tilt-latch (10) having a bolt stop for a sash window (12) is disclose d. The sash window (12) is disposed within opposed guide rails (16) on a master frame (14). The sash window (12) is comprised of a top sash rail (20), a base (22) and two stiles (24,26) connected together at their extremities to form a frame. The tilt-latch (10) is adapted for releasably securing the sash window (12) to the master frame (14). The tilt-latch (10) is comprised of a housing (42) adapted to be supported b y the top rail (20). The housing (42) has an outward end opening (44). A latch bolt (4 6) is disposed within the housing (42) and has a nose adapted for engaging a respective one of the guide rails (16). The tilt-latch (10) also has means for biasing the latch bolt (46) through the outward end opening (44). A protrusion (80) is located either on the latch bolt (46) or the housing (42) and a lock wall (86) is located either on the housing (42) or the latch bolt (46). The protrusion (80) has a stop surface (84) and is moveable between a first position defining a prevent position (94) wherein the stop surface (84) is adapted to abut the lock wall (86) to prevent retraction of the latch bol t (46) into the housing (42), and a second position defining a deflected position (96) where in the stop surface (84) does not abut the lock wall (86) to allow retraction of th e latch bolt (46) into the housing (42). The protrusion (80) is biased to the prevent position (94).