Abstract: A window unit has a sliding sash which is moved latterly in the window frame as the sash is closed to compress weather stripping extending completely around the sash between the sash and a peripheral stop surface on the window frame. The sash is also tiltable as well as slidable.
Abstract: A window lock for a slideable and tiltable window sash. The lock has a housing for attachment to a window unit to present a slideway extending transversely of the sliding movement of the window, and a locking member having a bolt at one end slideable in said housing slideway to move said bolt between a first maximum outwardly projecting sash locking position, a partially retracted sash sliding position for allowing vertical sash sliding movement, and a fully retracted sash tilting position.