A professional who tends equipment that regulates flow of byproduct gases in coke-oven standpipes preparatory to discharging or charging oven. Respnsibilities include:

• Moves controls to regulate flow of gases to collecting main, to open standpipes and oven charging holes, clear oven and standpipe of gases, and control flow of ammonia liquor and steam during charging.
• Sweeps spillage into charging holes.
• Cleans top of ovens, using broom and shovel.
• Clears standpipe, nozzles, and charging holes, using chisel bar and drill.
• Pokes coal from hoppers on charging car, using bar.
• May hook chains to oven doors and use winch to raise or lower doors.
• May loosen, unplug, and move tar in main, using bar.