| 摘要 |
<p>A tilt-latch (10) adapted for releasably securing a pivotable sash window (12) disposed within opposed guide rails (16) on a master frame (14) of a window sash assembly (11) is disclosed. The sash window (12) comprises a top sash rail (20), a base (22) and two stiles (24,26) connected together at their extremities. The tilt-latch (10) comprises a housing (42) adapted to be supported by the top rail (20). The housing (42) has an outward end opening (44) and a tongue (76) extending along a bottom wall (45) of the housing (42). The housing (42) also has a cover (51) having an elongated opening (70) defining a pair of rails (72,74). The housing (42) further has an outer edge (110). A latch bolt (46) is disposed within the housing (42) and has a nose (47) adapted for engaging a respective one of the guide rails (16). The latch bolt (46) has a first bolt channel (82) in cooperative sliding engagement with the first tongue (76). The tilt-latch (10) also has means for biasing the latch bolt (46) through the outward end opening (44). An actuator (48) is connected to the latch bolt (46) and has an actuator channel (100,102) on opposed longitudinal edges (96,98) of the actuator (48) that cooperate with the elongated opening rails (72,74) wherein the actuator (48) is slideable along the cover (50) to retract the latch bolt (46) into the housing (42). A portion of the actuator (48) moves past the outer edge (110) when retracting the latch bolt (46) into the housing (42).</p> |
