Mining machines

Details Mining machines Mining machines

1976-02-24

1977-12-13

Purser, Ernest R.

Mining or in situ disintegration of hard material

Automatic control; signaling or indicating

Of hard material disintegrating machine

E21C 3512

Patent

active

040625931

ABSTRACT:
A linear potentiometer is attached to the ranging arm of a ranging arm shearer such that it slides on the upper flange of the face conveyor to sense the height of the cutter drum relative to the conveyor.

REFERENCES:
patent: 3371964 (1968-03-01), Weber
patent: 3817578 (1974-06-01), Wilson

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