Paul Chappell Quotes
With this hand you can clutch objects such as a ball, you can move the thumb out to one side and grip objects with the index finger in the way you do when opening a lock with a key, and you can wrap your fingers around an object in what we call the power grip - like the one you use when you hold a hammer or a microphone. 
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Hand | Clutch | Objects | Ball | Move |
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The real thumb can move in five types of way. We have managed to create a thumb that can mimic at least two of these like hold a ball, move the thumb and middle finger, as when unlocking the door or gripping an object like a hammer or microphone.
- Paul Chappell
The aim is to create a hand with the sort of functionality a human hand has but also a sense of touch. This will let the hand know how tightly to grip an object like a coffee cup without dropping it, but not so tightly that it's crushed. It'll also have an integrated slip-sensor which will tell the hand if something is beginning to slip out of its grip so it can grip slightly harder. It'll be quite a clever system.
- Paul Chappell