Input: yellow handle.
Output: blue shaft.
Two orange pins are fixed to the handle.
Two green studs are fixed to a hub fixed to the shaft.
The studs are inserted into holes on the handle. The hole diameters are a bit larger than the ones of the studs.
Violet pins are placed in the wedge-shaped space between the blue hub and the outer stationary disk (in glass). Red spring maintains permanent contact of the violet pins with them.
When the handle turns clockwise (yellow arrow), the left orange pin pushes the l
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