5 ms·

The teeth of the wheel are holding on to it, and it looks like there are always two teeth inside the top.

• dwaltrip 13y ago
  Oh I see what you mean. The teeth slide through the curved channel, and are notched such that the channel is held in place. That is a clever design.
  • jarin 13y ago
    It's clever as long as you operate in a zero-friction environment :)
    • sanoli 13y ago
      That's what I thought also. Wouldn't the amount of force pulling on the cable lead to some jamming as soon as the little spokes stopped spinning so freely?
    • lambda 13y ago
      I'm wondering if the effects of friction could be mitigated by having ball bearings within the channel that the teeth pass through.