3 ms·
MIL-P-1629 from 1949 formally defines fail-open mechanical switches that release pressure on failure. The concept goes back to a pressure cooker invented in 16
by bryanlarsen 1mo ago
MIL-P-1629 from 1949 formally defines fail-open mechanical switches that release pressure on failure.
The concept goes back to a pressure cooker invented in 1679 by Papin.
- calvinmorrison 1mo agocontextual, as are air brakes 'failing closed'. However, I wonder how fast Papin made his spagbol with his pressure cooker
- froh 1mo ago[dead]