POSITIVE ACTION LOCK FOR SLIDING WINDOWS

摘要

A sliding window having a pair of sashes with a latch mechanism on the meeti ng rail of one of the sashes for latching the sashes together. To open the window, the latch mechanism is disengaged by grasping a finger grip on a latch handle to retract a latch bolt. As one or more of the sashes is slid to open the window and the latch mechanism clears the meeting rail of the other sash, a trigger cam rotates so that a portion extends outward from the latch mechanism and another portion releases a spring tab to engage and hold the latch bolt in t he retracted position. When the window is closed, the outwardly extending portion of the trigger ca m contacts the meeting rail of the other sash, causing the trigger cam to rotate in the opposite direction and releasing the latch bolt.