Different shaped slots for different tubes

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image showing Different shaped slots for different tubes

woodyever on January 2nd, 2018 at 10:14 UTC »

Seems like things would go seriously wrong if these all had the same shaped slots

turn0 on January 2nd, 2018 at 10:25 UTC »

It is called 'mistake proofing.' Engineer out human caused errors with thoughtful design.

Edit: It is also called by the Japanese term, Poka-yoke https://en.wikipedia.org/wiki/Poka-yoke.

BenderDeLorean on January 2nd, 2018 at 10:35 UTC »

Sorry we vacuumed the brain out of your grand father.