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Akro Spinner Cup?


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Notice the nail like object at the top of the cup(the glass wraps around it in the one pic) This gave the glass resistance so it would corkscrew when hitting the grooves in the top of the cup. As the cup spins the glass flows downe then as it is sheared the cup actually tipped down thwn back up to flip the marble onto the rounding rollers below and return to get the new flow.



colorized by Jeff Hale

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Akro spinner cup,made of graphite,so the glass does not stick to it. The ones i have seen had two letters or initials stamped or cut into each one. I am not sure what the letters were for? Maybe they were issued to each operator?




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