Trip hammer
TL;DR
Trip hammer - requires enrichment with adjacent possible narrative
"Although Chinese historians assert that its origins may span as far back as the Zhou Dynasty (1050 BC–221 BC), the British sinologist Joseph Needham regards the earliest texts to describe the device are the Jijiupian dictionary of 40 BC" and other texts from 15 BC and 20 AD
What Had To Exist First
Preceding Inventions
What This Enabled
Inventions that became possible because of Trip hammer:
Biological Patterns
Mechanisms that explain how this invention emerged and spread: