This provides for locking the sash in place along a vertical axis of the jamb liner when the sash is tilted away from {HEAD ~ the vertical axis} of {TAIL ~ the jamb liner} 
This provides for locking the sash in place along a vertical axis of the jamb liner when the sash is tilted away from { HEAD ~ the vertical axis } of { TAIL ~ the jamb liner }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL