ocr: WINDOWSHADE ERTTA - - - à - YOU PULL a window shade down, A) you : wind up a spring. When you let LOCKING go, a ratchet mechanism holds the shade DISK int the right place, against the pressure of the spring. A sudden movement, however, RATCHET throws the pawls outward, unlocking the shade. The spring then unwinds, pulling the shade back up. PAWL PAWL SHAFT LOCKING. DISK Aa1 1 SEE ALSOJ RATCHET SPRING FIXED. o -2 CENTRAL ROD