Add to ORKG24-B longwall cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio in use at the Blocton Cahaba Coal Company, Coleanor, Alabama, 1928. Longwall cutters were powered by either 250 or 500 volt direct current motors
29-U coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio on display in the facto...
34-F coal cutter and loader made by the Jeffrey Manufacturing Company of Columbus, Ohio in use at th...
This miner is operating a coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio. T...
24-B longwall cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio in use at the Peerl...
24-A longwall cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio in use at the Monte...
24-A longwall cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio. Longwall cutters w...
Shortwall coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio in use at the Fran...
Two miners lying on their sides in a cramped mine space are operating a 24-B Longwall Coal Cutter bu...
This photograph shows the discharge end of a longwall coal conveyor built by the Jeffrey Manufacturi...
Coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio on display in the factory, 1...
Model 300/310 coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio outside the fa...
34-F coal cutter and loader made by the Jeffrey Manufacturing Company of Columbus, Ohio on display i...
41-A coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio on display in the Jeffr...
Two miners are using a 29-U coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio ...
Model 300-U coal cutter built by the Jeffrey Manufacturing Company of Columbus, Ohio inside the fact...
29-U coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio on display in the facto...
34-F coal cutter and loader made by the Jeffrey Manufacturing Company of Columbus, Ohio in use at th...
This miner is operating a coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio. T...
24-B longwall cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio in use at the Peerl...
24-A longwall cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio in use at the Monte...
24-A longwall cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio. Longwall cutters w...
Shortwall coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio in use at the Fran...
Two miners lying on their sides in a cramped mine space are operating a 24-B Longwall Coal Cutter bu...
This photograph shows the discharge end of a longwall coal conveyor built by the Jeffrey Manufacturi...
Coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio on display in the factory, 1...
Model 300/310 coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio outside the fa...
34-F coal cutter and loader made by the Jeffrey Manufacturing Company of Columbus, Ohio on display i...
41-A coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio on display in the Jeffr...
Two miners are using a 29-U coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio ...
Model 300-U coal cutter built by the Jeffrey Manufacturing Company of Columbus, Ohio inside the fact...
29-U coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio on display in the facto...
34-F coal cutter and loader made by the Jeffrey Manufacturing Company of Columbus, Ohio in use at th...
This miner is operating a coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio. T...