Long-wall mining machine with a working chain

Details Long-wall mining machine with a working chain Long-wall mining machine with a working chain

1995-10-06

1997-04-29

Tsay, Frank

Mining or in situ disintegration of hard material

Automatic control; signaling or indicating

Of hard material disintegrating machine

299 43, E21C 3512, E21C 3524

Patent

active

056241623

ABSTRACT:
A long-wall mining machine has an operating chain entraining conveyor flights or mining tools and displaceable in a trough which can be provided with rows of sensors of an inductive proximity type responding to the chain and the tools and generating measurement pulse trains which are compared with setpoint pulse trains to signal functional parameters of chain operation. The sag of the chain is determined by a row of sensors and in response to the sag a chain-tension unit can be controlled.

REFERENCES:
patent: 3968995 (1976-07-01), Arentzen
patent: 4088370 (1978-05-01), Jarvis et al.
patent: 4090601 (1978-05-01), Freed, Jr.
patent: 4260191 (1981-04-01), Weber
patent: 4277105 (1981-07-01), Taylor
patent: 5228751 (1993-07-01), Ramsden, Jr.

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