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  1. Andy Martin

    Equal pull pulley system - need ideas

    Hmmm, interesting. I had not heard of a whippletree before, but I recognize the mechanism. Not sure I would have the width available to accommodate the width required for the system of levers. Can you think of anything similar using pulleys?
  2. Andy Martin

    Equal pull pulley system - need ideas

    I have a very compact device that I'm designing. It pulls cords (fishing line) that operate the chords on a guitar for people not able to use the fret board. Here the problem - a first class lever pulls on three cords simultaneously in response to finger pressure on the other end of the lever...

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