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/ The Way Things Work / Way Things Work, The (1994)(Dorling Kindersley).iso / article3 / roll / roll0m.dib (.png) < prev    next >
Bitmap Image  |  1994-04-22  |  74.8 KB  |  540x450  |  8-bit (61 colors)
   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