MocCoy kept the trans steam engines

MocCoy kept the trans steam engines working well. He oiled the moving parts of the train. It took a long time to oil a train. This job was dangerous because it had to be done while the train was standing still. When trains were stopped to be oiled, other trains sometimes crashed into them. McCoy invented a device that could oil a train while it was moving. In 1872 he applied for a patent from the