Abstract: A balance shoe for a pivotable window sash assembly includes a base unit at the lower end of the balance shoe. The base unit includes a fixed wall having a movable wall connected thereto by a connecting structure. A cam is disposed between the fixed wall and the movable wall for moving the movable wall with respect to the fixed wall while the connecting structure maintains the movable wall in a generally parallel relationship with the fixed wall. The cam extends beyond the upper edge of the fixed wall and the movable wall. This arrangement of elements permits a smaller window to be used while still providing the same egress area when the window is open as compared to conventional window assemblies.

Abstract: A pivotable window sash assembly includes a pivot bar which engages a balance shoe for holding the sash to a master frame. The shoe has a recess in which a locking member is rotatably mounted. The locking member includes an exposed keyway which is selectively aligned with at least one slot in the shoe located at the recess. The pivot bar has an arm which functions as a key for fitting in the keyway and has at least one projection extending outwardly from the arm for fitting in each slot when the slot and keyway are aligned. The pivot bar has a locking member which snaps into a hole in the sash.