Geneva drive - GIFs

A Geneva drive is a gear mechanism that translates a continuous rotational movement into intermittent rotary motion.

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An oscilloscope knob with a Geneva drive:

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Previously:

https://www.homemadetools.net/forum/...138#post126043
https://www.homemadetools.net/forum/...037#post129872
https://www.homemadetools.net/forum/...2482#post45335
https://www.homemadetools.net/forum/...4358#post79804
https://www.homemadetools.net/forum/...8594#post87797

Thanks for an excellent example, of a practical application, for the Geneva mechanical escapement.

Lots of Geneva centered mechanisms in packaging machinery.
Machines are built around specific containers. They [Geneva] dispense stacked cups into fillers, place and burp lids, date stamp, and rotate for labeling. Usually cups are unstacked by 2 or 3 very long pitched helical grooved bars. The sealing lip has a job before food or other product is introduced.
Everything is fine until that container manufacturer stops; but the molds re-sell for use elsewhere.
Like features on cable TV "How It's Made" all the toolmaking somehow never enters the picture. Yogurt just plops out of a tub. No one asks where the tub or rotary measuring valve comes from, and that's why machining is an unsung art.