A crab, winch, or windlass for hoisting. Standard, 2
The periods of acceleration, uniform speed, retardation, and rest. The
deeper the shaft, the greater is the ratio of the time of full-speed
hoisting to the total hoisting cycle. For shallow shafts there may be very
little time at full speed, retardation beginning almost at the end of the
accelerating period. Lewis
The flanged cylindrical part of a windlass around and on which the hoist
rope or cable is wound. Also called spool. Long
One who operates a hoisting engine, esp. at a mine or quarry. Also called
engineman. See also:hoistman
A device for applying hand power to lift an object by means of a screw or
lever, or by hydraulic power. Fay
A pin-thread heavy-bodied coupling provided with a swivel-mounted eye in
the end opposite the pin-thread end. When attached to the hook on the
drill-hoist line, the pin-thread end can be screwed into the rods to hoist
and otherwise handle drill-string equipment when making borehole round
trips. Also called swivel plug. See also:plug
Long
The capacity of the hoisting mechanism on a drill machine. May be
expressed in terms of the number of lineal feet of a specific-size drill
rod a hoist can lift on a single line or in terms of the total weight it
can handle, figured in pounds or tons. Long
A rope composed of a sufficient number of wires and strands to ensure
strength and flexibility. Such ropes are used in shafts, elevators,
quarries, etc. Zern
See:winding sheave
In mining, a person who operates steam or electric hoisting machinery used
to lower cages (elevators) and skips (large, metal, boxlike containers)
into a mine and to raise them to the surface from different levels. May be
designated according to type of power used, as electric-hoist person or
steamhoist person. Also called cageman; cage runner; hoist engineer; hoist
engineman; hoisting engineer; hoisting engineman; hoist operator;
operating engineer; shaft driver; shaft engineer; shaft-hoist engineer;
shaft hoistman. DOT
a. In petroleum production, one who lowers and raises surveying,
servicing, or testing instruments in and out of oil or gas wells on
electrical conductor cables, using truck-mounted hoisting equipment. Also
called winch operator. DOT
b. See:hoistman
A device that can be set to prevent the operation of a mine hoist at
speeds greater than predetermined values and usually causes an emergency
brake application when the predetermined speed is exceeded.
A device that can be set to cause an emergency brake application when a
cage or skip travels beyond a predetermined point into a danger zone.
Prescribed signals for indicating to the hoist operator the desired
direction of travel and whether people or materials are to be hoisted or
lowered in mines.
A system whereby signals can be transmitted to the hoist operator (and in
some instances by the operator to the cager) for control of mine hoisting
operations.
A device for automatically cutting off the power from the hoist motor and
causing the brake to be set in case the links in the brake rigging require
tightening or the brakes require relining.
A device that graphically records information such as the time and number
of hoists made as well as the delays of idle periods between hoists.
Syn:trip recorder
On an inclined belt conveyor system, a brake that comes automatically into
use in the event of power failure, thus preventing the loaded belt from
running downward and piling up rock. Pryor, 3
Temperature indicator that consists of a series of small bars placed
horizontally on a refractory stand. On heating, some bars are bent to
varying degrees, while others are unaffected. The temperature is indicated
by the bar that is just beginning to sag. The bars are numbered 1 to 40,
the temperature range being 600 to 1,550 degrees C.
See also:thermoscopic bar
An orthorhombic mineral, (Mn,Mg)6 Zn3 (AsO4 )2
(SiO4 )(OH)8 ; in zinc deposits at Franklin, NJ.
Temporary anchorage for guy ropes. Hammond