Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine
Patent
1983-12-28
1986-05-27
Novosad, Stephen J.
Mining or in situ disintegration of hard material
Automatic control; signaling or indicating
Of hard material disintegrating machine
299 75, E21C 2720
Patent
active
045912092
ABSTRACT:
For protecting partial-cut cutting machines from overload, a vibration sensor 7 is provided on the swivellable cutting arm 2 carrying rotatably supported cutting heads 6. The signals of the vibration sensor 7 are utilized in an electronic control 8 and used for controlling the pivotal drive of the cutting arm 2. The electronic control 8 has a threshold switch which is connected with an adjusting drive for varying the supply capacity of the hydraulic pump of the pivotal drive.
REFERENCES:
patent: 4470635 (1984-09-01), Paurat et al.
Droscher Bernhard
Schetina Otto
Wrulich Herwig
Zitz Alfred
Goodwin Michael A.
Novosad Stephen J.
Voest-Alpine Aktiengesellschaft
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