Comment by bryanlarsen
13 hours 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.
13 hours 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.
contextual, as are air brakes 'failing closed'. However, I wonder how fast Papin made his spagbol with his pressure cooker
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