An inclined track up and down which wagons travel fixed at equal intervals
to an endless steel wire rope, either above or below the wagons.
Hammond
A drum on which conductor cable is wound, including one or more collector
rings and associated brushes, by means of which an electric circuit is
made between the stationary winding on the locomotive or other mining
device and the trailing cable that is wound on the drum. The drum may be
driven by an electric motor, by a hydraulic motor, or mechanically from an
axle on the machine.
A face or gathering locomotive driven by a power cable connected to
trolley wires. The cable winds on a reel attached to the locomotive.
Nelson
A one-way or closed-circuit conveyor powered by a flexible,
torque-transmitting cable of which helical (screw) threads are an integral
part. Loads or load carriers engage the thread and advance a distance
equal to one pitch each revolution of the cable screw.
A conveyor belt in which the carrying section is composed of rubber and
fabric with attached intermittent transverse metal supports having both
ends supported by cables. The cables transmit the driving force, and the
center portion functions as the load-supporting medium.
A metallic shield consisting of nonmagnetic material applied over the
insulation of the individual conductors or conductor assembly.
USBM, 2
A short piece of tubing or a specially formed band of metal generally used
without solder in joining ends of portable cables for mining equipment.
One of the well-known drilling systems, sometimes designated as the
American or rope system. The drilling is performed by a heavy string of
tools suspended from a flexible manila or steel cable to which a
reciprocating motion is imparted by an oscillating "walking beam" through
the suspension rope or cable. See also:churn drill
See:churn drill
See:cable bolt
The rock fragments and sludge produced in drilling a borehole with a churn
drill. Long
See:tooldresser
See:churn drill; percussion drill.
A method of drilling, now largely replaced by rotary drilling, in which
the rock at the bottom of the hole is broken up by a steel bit with a
blunt, chisel-shaped cutting edge. The bit is at the bottom of a heavy
string of steel tools suspended on a cable that is activated by a walking
beam, the bit chipping the rock by regularly repeated blows. The method is
adapted to drilling water wells and relatively shallow oil wells.
AGI
The bits and other bottom-hole tools and equipment used to drill boreholes
by percussive action, using a rope, instead of rods, to connect the
drilling bit with the machine on the surface. See also:churn drill
Long
A system in which the carriers are supported by a cable and are not
detached from the operating span. The travel of the carriers is wholly
within the span. See also:aerial cableway
A slackline cableway used for excavating a restricted area.
Hammond
A transporter crane on which the track for the carrier is a steel wire
rope. Hammond
a. An unfaceted cut gemstone of domed or convex form. The top is smoothly
polished; the back, or base, is usually flat or slightly convex, may be
concave, and is commonly unpolished. The girdle outline may be round,
oval, square, or any other shape.
b. The style of cutting such a gem.
c. A polished but uncut gem. See also:en cabochon
A hydrous arsenate of nickel, cobalt, and magnesium; possibly magnesian
annabergite.
See:cacholong