APRONYM
purity
100% DEADMAN'S BUTTONDevice Employed As Defensive Mechanism Against Napping Staff By Using The Tension Of Normality Sean Lamb. The Deadman's Button is a device installed in lomotives that must remain depressed by the engineer (usually under his/her foot) to prevent the brakes from being applied; the theory is that if the engineer had a lapse of consciousness (falling asleep, heart attack, whatever), his foot would come off the button, thus applying the brakes.
Transport:Trains
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