Mechanical Memories Magazine

So in theory it's all quite simple, so why the difficulty? Note the connecting horizontal
lever that joins both coin mechanisms. So when in play you can see that turning either
smooth metal knob acts on a lot oflevers, switches and ratchets.
There are two design issues that add friction. One is the item marked sliding
edge. The act of turning the knob swings that edge down to engage with a horizontal
pin positioned on the vertical, spring loaded lever which holds the coin in place and is
also attached to the connecting horizontal lever that joins both coin mechanisms. That
in turn acts on a 'pull' which travels behind the lamp bracket and acts on the ratchet
that turns the drum. The leading edge is steep and if the ratchet isn't loose then those
two issues alone make it most difficult to complete the cycle.
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