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US 4,467,895 AGranted
Slack rope detecting apparatus
AssigneeCrucible Society Anonyme
InventorsErnest B. Smith, Phillipus D. Slabbert, Bernardus J. Bout, Peter C. Vickers
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AssigneeCrucible Society Anonyme
InventorsErnest B. Smith, Phillipus D. Slabbert, Bernardus J. Bout, Peter C. Vickers
Estimating the term…
A slack rope detecting apparatus for use in mine winding operations provides a trip signal via contacts 34 if the load in the rope falls below a predetermined value. The apparatus senses the load at each side of a sheave wheel using transducers 6 and 8 and uses a mean value of their outputs as an input to a summation amplifier 12. The weight of the rope between the sheave wheel is compensated for by monitoring rotation of the winding engine drum 42 and providing corresponding input signals for the amplifier 12. When the effective load in the rope falls below a predetermined value, set by input 28, a trip signal is produced. The trip signal output is preferably visually displayed and recorded.
A slack rope detecting apparatus for use in mine winding arrangements having a winding engine, a head gear including a sheave wheel supported in the head gear, the apparatus comprising means for monitoring the load in the rope and for producing first electrical load output signals corresponding thereto, said means for monitoring including means arranged to monitor the force applied by the rope on the head gear, said means for monitoring being arranged to monitor the force applied between the sheave wheel and at least one of its supports, and an electrical circuit means including comparator means arranged to receive the load output signals and compare the output signals with a predetermined value and to produce a winding engine trip signal whenever the load output signals fall below a predetermined value.
A slack rope detecting apparatus for use in mine winding arrangements including a winding engine, head gear including a sheave wheel supported in the head gear by supports at each side of the sheave wheel, a rope extending between the winding engine and a cage, the apparatus comprising measuring means for measuring the force at each support and providing corresponding electrical load signals, circuit means for combining said load signals and providing mean values thereof, monitoring means for monitoring the length of the rope between the head gear and the cage and providing electrical compensating signal corresponding to the weight of that rope, circuit means for receiving the mean load signals and the compensating signals arranged to reduce the effective load signals by the compensating signals as the length of the rope between the head gear and the cage increases, comparator circuit means arranged to compare the effective load signals with a predetermined value and to produce winding engine trip signals whenever the effective load signals fall below that value.
Dependencies are inferred from the claim text.