Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine
Patent
1980-04-03
1982-03-30
Purser, Ernest R.
Mining or in situ disintegration of hard material
Automatic control; signaling or indicating
Of hard material disintegrating machine
173 9, 299 75, E21C 2724, E21D 908
Patent
active
043221130
ABSTRACT:
A excavating machine for excavating rock and minerals from a working face having a carriage with a boom support. A cutter carrying boom is moveably supported by the boom support, and a means is provided for moving the boom relative to the carriage. A drive means is included with a sensing control means for controlling the movement of the boom relative to the carriage. The sensing control means senses a parameter proportional to the reaction cutting force on the cutter. Control over the movement of the boom is provided in two alternative modes of control. A rate mode control for controlling the machine in accordance with a preselected rate of the output of the drive means is provided, as well as a load mode control in which the movement of the boom is controlled maintaining the reaction cutting force exerted by the cutter substantially at or below a certain value.
REFERENCES:
patent: 2334009 (1943-11-01), Jeffrey
patent: 2841379 (1958-07-01), Driehaus
Dowell Joseph
Haskew Francis A.
Taylor Timothy P.
Coal Industry (Patents) Limited
Purser Ernest R.
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