The layer of high friction resilient material is preferably constructed and arranged for providing a braking surface to prevent {TAIL ~ vertical movement} of the window sash when the sash is tilted away from the vertical axis of the jamb liner and the high friction resilient material is contacted by {HEAD ~ the locking} means 
The layer of high friction resilient material is preferably constructed and arranged for providing a braking surface to prevent { TAIL ~ vertical movement } of the window sash when the sash is tilted away from the vertical axis of the jamb liner and the high friction resilient material is contacted by { HEAD ~ the locking } means
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