a. In a belt-conveyor system, a tensioning device such as a
carriage-mounted weight free to run downslope or a takeup pulley with
weights hanging vertically below the belt near the feed end.
Pryor, 3
b. Any device for taking up slack or removing the looseness of parts due
to wear or other cause. Crispin
c. See:chain takeup
An idler pulley so mounted that its position is adjustable to accommodate
changes in the length of the belt as may be necessary to maintain proper
belt tension. NEMA, 2
Eng. A mineral-land lease. See also:take; tack. Fay
A surface depression containing clay and evaporites in south-central Asia.
Also spelled takir.
A pig iron and ore process that depends upon the rapid oxidation of the
impurities contained in pig iron by a liquid, highly ferruginous slag and
that is carried out in the basic open-hearth furnace, generally of the
tilting type. The essential feature of the process is to retain a certain
amount of metal in the furnace (1) to dilute the impurities contained in
the additions of pig iron, and (2) to supply the heat necessary to keep
the slag very fluid. Osborne
A process for protecting the inside of cast-iron pipes with a coating of
sand and bitumen. Hammond
a. A monoclinic and triclinic mineral, 2[Mg6 (OH)4 (Si (sub
8) O20 )] ; basal cleavage; soft; has a greasy or soapy feel;
easily cut with a knife; occurs as hydrothermal alteration of ultramafic
rocks, low-grade metamorphism of siliceous dolomites in foliated,
granular, or fibrous masses; an insulator, ceramic raw material, and
lubricant. Originally spelled talck. See also:steatite; soapstone.
b. In commercial usage, a talcose rock; a rock consisting of talc,
tremolite, chlorite, anthophyllite, and related minerals. Syn:talcum
a. A massive variety of talc. Fay
b. Damourite, a soapy-feeling hydromuscovite.
Resembling talc, as talcoid schist. Fay
a. Pertaining to or containing talc; e.g., talcose schist.
b. Resembling talc; e.g., a talcose rock that is soft and soapy to the
touch.
A schist in which talc is the dominant schistose mineral. Common
associates are mica and quartz. AGI
See:talc; soapstone.
Applied to a series of small bumps or cracking noises within the walls.
Bumping, talking, and spitting are signs that the rock is beginning to
yield to the stresses and indicate a change in conditions within the rock.
Spalding
A style of cutting precious stones in which the stone is domed on one or
both sides. Fay
Ir. A variety of highly flammable peat. Tomkeieff
A precious stone with a very rounded front and a flat back.
Standard, 2
a. A mark or number placed on every car of coal or ore a miner sends out,
usually a metal ticket. By counting these, a tally is made of all the cars
the miner sends out. See also:tab; tag; ticket. Fay
b. A brass tag attached to a chain at every tenth link, and so marked or
shaped as to enable the position of the tally along the chain to be
immediately read. CTD
See:tally shouter
See:chute checker
A laborer who calls out the number chalked on each loaded mine car, as it
is run on scales for weighing, so that the weighmaster can identify for
pay purposes the miner who loaded the car. Syn:tally boy
Rock fragments of any size or shape (usually coarse and angular) derived
from and lying at the base of a cliff or very steep, rocky slope. Also,
the outward sloping and accumulated heap or mass of such loose broken
rock, considered as a unit, and formed chiefly by gravitational falling,
rolling, or sliding. See also:scree