Well, Dub-Dub, I pumped gas, and we always just called it the "nozzle lock".


Only in this case, it locks the nozzle open to keep the gas flowing, so you can attend to other customers at the same time. Which made for a lot of mighty messes in the days before computerized timers on the pumps...because if you didn't orchestrate your timing properly the nozzle would spill onto the pavement, or sometimes even pop out of the full gas tank and start snaking around the lot with a jet-propelled geyser of gas. You could only pray, then, that no one around had a lit cigarette.