Method of indirect measurement of cowl position on a longwall sh

Details Method of indirect measurement of cowl position on a longwall sh Method of indirect measurement of cowl position on a longwall sh

1989-12-22

1991-05-07

Britts, Ramon S.

Mining or in situ disintegration of hard material

Automatic control; signaling or indicating

Of hard material disintegrating machine

299 45, E21C 3520

Patent

active

050130919

ABSTRACT:
The position of the cowl on a longwall shearing machine is determined by loads, stresses or deflections measured on the ranging arm, clevis and pin connection on the ranging arm or lift cylinder and its linkage to the machine.

REFERENCES:
patent: 4006935 (1977-02-01), Gapper et al.
patent: 4068894 (1978-01-01), Dring

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