Add to ORKGThe Jeffrey Manufacturing Company built this 120-L Heliminer coal cutter and conveyor. This machine could cut and move 12 to 16 tons of coal per minute. The location of this photograph, taken in 1972, is unknown
Coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio on display in the factory, 1...
This miner is using an underground coal conveyor made by the Jeffrey Manufacturing Company of Columb...
44-D coal loading machine made by the Jeffrey Manufacturing Company of Columbus, Ohio in use at the ...
Heliminer mining machine made by the Jeffrey Manufacturing Company of Columbus, Ohio at work in a co...
Heliminer mining machine made by the Jeffrey Manufacturing Company of Columbus, Ohio inside the fact...
This Heliminer coal cutter and conveyor was made by the Jeffrey Manufacturing Company, Columbus, Ohi...
This photograph shows the discharge end of a 34-B coal cutting and loading machine built by the Jeff...
Coal cutting and loading machine made by the Jeffrey Manufacturing Company of Columbus, Ohio in use ...
34-F coal cutter and loader made by the Jeffrey Manufacturing Company of Columbus, Ohio on display i...
Model 300-U coal cutter built by the Jeffrey Manufacturing Company of Columbus, Ohio inside the fact...
Colmol mining machine made by the Jeffrey Manufacturing Company of Columbus, Ohio inside the factory...
Model 300/310 coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio outside the fa...
This is a photograph of a 99A Belt Conveyor made by the Jeffrey Manufacturing Company, Columbus, Ohi...
Example of patterns cut on the wall of a coal mine by a Colmol mining machine, 1950. This machine co...
A man demonstrates the body position of a miner while operating a 120-L mining machine made, 1971. T...
Coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio on display in the factory, 1...
This miner is using an underground coal conveyor made by the Jeffrey Manufacturing Company of Columb...
44-D coal loading machine made by the Jeffrey Manufacturing Company of Columbus, Ohio in use at the ...
Heliminer mining machine made by the Jeffrey Manufacturing Company of Columbus, Ohio at work in a co...
Heliminer mining machine made by the Jeffrey Manufacturing Company of Columbus, Ohio inside the fact...
This Heliminer coal cutter and conveyor was made by the Jeffrey Manufacturing Company, Columbus, Ohi...
This photograph shows the discharge end of a 34-B coal cutting and loading machine built by the Jeff...
Coal cutting and loading machine made by the Jeffrey Manufacturing Company of Columbus, Ohio in use ...
34-F coal cutter and loader made by the Jeffrey Manufacturing Company of Columbus, Ohio on display i...
Model 300-U coal cutter built by the Jeffrey Manufacturing Company of Columbus, Ohio inside the fact...
Colmol mining machine made by the Jeffrey Manufacturing Company of Columbus, Ohio inside the factory...
Model 300/310 coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio outside the fa...
This is a photograph of a 99A Belt Conveyor made by the Jeffrey Manufacturing Company, Columbus, Ohi...
Example of patterns cut on the wall of a coal mine by a Colmol mining machine, 1950. This machine co...
A man demonstrates the body position of a miner while operating a 120-L mining machine made, 1971. T...
Coal cutter made by the Jeffrey Manufacturing Company of Columbus, Ohio on display in the factory, 1...
This miner is using an underground coal conveyor made by the Jeffrey Manufacturing Company of Columb...
44-D coal loading machine made by the Jeffrey Manufacturing Company of Columbus, Ohio in use at the ...