Typewriter ribbon 1 is fed by rollers 2 and 3 to rotating reel 4. Motion is transmitted from roller 3 to chain 5 through gears 6, 7 and 8 and sprocket 9. Dog a of chain 5 is set up to the amount of ribbon to be wound. When reel 4 is full, dog a engages lever 10 and turns it clockwise. This releases lever 11 which is turned clockwise by spring 12. As a result, clutch 13 is disengaged by spring 14 from rotating disk 15, and reel 4 stops. Feeding of ribbon 1 also ceases because braking lever 16 stops roller 3.
$2546$LrG,FD$