Gte, I enjoyed a Steve Mould video last night and it was bothering me too that such a simple mechanism didn’t have a short hand way of expressing it. Here’s Dr. Drang on Over Centre mechanical mechanisms. The magic of people is like the seas of Naboo—There’s always a bigger nerd. (Or one with domain knowledge beyond your own. Which is even better.)
https://fosstodon.org/@drdrang/112367326037152201