A joint having a central hinge like an elbow, and operated by applying the
power at the junction of motion, as from horizontal to vertical, and
giving enormous mechanical advantage; a mechanism common in many forms of
presses and in stone crushers. Standard, 2
A mechanism utilized to apply heavy pressure from a small applied force,
such as in a jaw breaker, and other machinery. Hammond
An old French unit of length used in early geodetic surveys and equal to 6
French ft, 6.396 U.S. ft, or 1.949 m. AGI
A specified allowance (either plus or minus) of the given dimensions of a
finished product to take care of inaccuracies in workmanship of parts to
be fitted together. The amount allowed as tolerance is generally small as
compared with the standard dimension of the part; e.g., the tolerance
allowed in the set diameters of a diamond bit is + or -0.02 mm.
Long
In control of a measured value in a process, limited drift from optimum or
norm (e.g., pH 7.6 + or - 0.2). Pryor, 3
Ches. Royalty on rock salt, or other mineral. Fay
A proposed arrangement by which uranium owned privately could be enriched
in uranium-235 content in U.S. Government facilities upon the payment of a
service charge. Lyman
Situation in which the owner of ore or concentrate contracts the refining
of the metal to another party for a fee, but the refined metal remains
under the original ownership for final sale or disposition.
a. An inclined trough in which gold-bearing earth or gravel is crudely
washed; usually called long tom because it is longer than the rocker.
Webster 2nd
b. Cumb. A parting of black shale in a coal seam. Arkell
An electrolytic process for refining lead in which the electrolyte is a
solution of a double acetate of lead and potassium or sodium. The anodes
are cast from crude argentiferous lead, and the cathodes are in the form
of large disks of copper or aluminum bronze and are about half immersed in
the electrolyte. Fay
A short rod used as a lever or handle for turning a jackscrew or a spanner
by being inserted loosely in the hole provided for that purpose.
Long
A division of radiography dealing with the photography of a particular
plane in an object while leaving out undesired detail in other planes.
Although this technique was developed for medical radiography, it is
recommended for certain purposes in work with metals where it is essential
that the location of faults be exactly known. Osborne
Commercial brand of wire screen cloth with long rectangular meshes.
Pryor, 3
a. That attribute of a color that determines its position in a scale from
light to dark. Thus white, and also light gray, are light tones, and dark
gray is the dark tone of the same color sensation; pink is a light tone of
red, and maroon a dark tone. A light tone is usually known as a tint, a
dark tone as a shade. See also:intensity
b. A monochromatic frequency of vibration, such as in a violin string or
vibrations of bodies of finite size and shape.
A hard, replaceable, serrated metal insert in pipe tongs, which comes in
contact with and grips the outside of a pipe, casing, or drill rod. Also
called tong key. Long
One of the various tools or wrench devices that can be made to fit and
grasp drill rods, casing, or drivepipe. Long
a. A branch or offshoot of a larger intrusive body. See also:epiphysis
Syn:apophysis
b. A minor lithostratigraphic unit of limited geographic extent, being a
subdivision of a formation or member, and disappearing laterally (usually
by facies change) in one direction; a member that extends outward beyond
the main body of a formation. CF:lentil
c. A lava flow that is an offshoot from a larger flow; it may be as much
as several kilometers in length. AGI
In welding, a split joint formed by inserting a wedge-shaped piece into a
corresponding split piece and welding the two together. Fay
An adjustable plate that controls the quantity of feed entrapped by the
rolls of a double-roll press. BS, 5
A test by which crystals and crystalline gemstones can be distinguished
from glass that feels warmer in comparison when held to the tongue because
of its lower thermal conductivity.
A blasting explosive consisting of a mixture of guncotton with a nitrate
and sometimes a nitro compound. Webster 3rd