Stan Meyer blew a hole in his living room floor. Then he invented this.

Stan Meyer told it himself, in Switzerland in 1989: "blowing a hole in the living room floor". Hydrogen and oxygen made from water want to burn back into the cell that made them, so he needed fire to go one way only. His answer was the quenching circuit: passages too small for a flame. The walls take its heat faster than it can burn, and it dies, the same physics as the miner's safety lamp of 1815. His spec: no wider than fifteen thousandths of an inch, at least an eighth of an inch long, in ceramic. Then he stretched it into a quenching tube to carry the gas. The memos and the full explainer film are on stanslegacy.com.

About the voices. The narrator is NeuralStan, an AI voice the archive uses for its made films. Where you hear Stan Meyer, it is Stan: every word of his is cut from an original recording, and nothing he says was synthesised.

Sources

• Stan Meyer lecture · Einsiedeln, Switzerland, 1989
• Animation: Stan's Legacy · how a small hole stops a flame
• Stan Meyer, Quenching Circuit Technology, Figure 2-5
• Stan Meyer, lecture, Einsiedeln, Switzerland, 1989 — stanslegacy.com
• Meyer, Quenching Circuit Technology (memo WFC 421), Figure 2-5: Preventing gas ignition — stanslegacy.com
• Episode: Cool to the Touch — the quenching disc at the scale of the hole — stanslegacy.com/episodes/cool-to-the-touch