Self-actuating mechanism at shaft head by which a skip is emptied and its
contents moved away to the next stage of handling. Pryor, 3
a. The transfer impedance of a network made up of a source and a load
connected by a transducer is the ratio of the phasor representing the
source voltage to the phasor representing the load current of the load.
Hunt
b. The complex-valued ratio of voltage at one pair of terminals to the
current at another pair in a four-terminal network. AGI
The point where coal or mineral is transferred from one conveyor to
another. See also:loading point
A table connected with rolling mills for laterally transferring work from
one mill to the other. Mersereau, 2
A constitutional change in a solid metal; e.g., the change from gamma to
alpha iron, or the formation of pearlite from austenite. CTD
The temperature at which a change in phase occurs. The term is sometimes
used to denote the limiting temperature of a transformation range.
A flow net whose boundaries have been properly modified (transformed) so
that a net consisting of curvilinear squares can be constructed to
represent flow conditions in an anisotropic porous medium. ASCE
A proponent of the theory that all granites had a metasomatic or
palingenic origin. CF:magmatist
AGI
The entry and exit of any gaseous or hydrothermal fluid in solid rock to
produce such rocks as granite. CF:granitization
See:intracrystalline
a. The spread or extension of the sea over land areas, and the consequent
evidence of such advance (such as strata deposited unconformably on older
rocks, esp. where the new marine deposits are spread far and wide over the
former land surface). Also, any change (such as rise of sea level or
subsidence of land) that brings offshore, typically deep-water
environments to areas formerly occupied by nearshore, typically
shallow-water conditions, or that shifts the boundary between marine and
nonmarine deposition (or between deposition and erosion) outward from the
center of a marine basin. Ant: regression. CF:onlap
marine transgression. AGI
b. A term used mostly in Europe for discrepancy in the boundary lines of
continuous strata; i.e., unconformity. See also:unconformity
AGI
See:onlap
A velocity, different from the steady state velocity, which a primer
imparts to a column of powder to start detonation.
A device for controlling or amplifying electric currents by means of
potential probes through a crystal of a semiconductor, commonly silicon or
germanium.
a. A theodolite in which the telescope can be reversed (turned end for
end) in its supports without being lifted from them, by rotating it 180
degrees or more about its horizontal transverse axis. AGI
b. The act of reversing the direction of a telescope (of a transit) by
rotation about its horizontal axis.---v. To reverse the direction of a
telescope (of a transit) by rotating it 180 degrees about its horizontal
axis. Syn:plunge
A trade name for a material of asbestos fiber and Portland cement molded
under high pressure. Used for fireproof walls, roofing, and in lining
ovens, etc. Crispin
A short belt carrying material from a loading point to a main conveyor
belt. Nichols, 1
a. A curve designed to effect a gradual change between a straight and a
circular curve. Hammond
b. See:spiral curve
a. In the periodic system, those elements characterized by the increment
of inner d shells of electrons which may become involved in secondary or
hybrid bond formation.
b. Elements having atomic numbers 21 (Sc) to 30 (Zn), 39 (Y) to 48 (Cd),
and 57 (La) to 80 (Hg).
Elements in the middle of the long periods of the periodic table. Usage
varies, but most commonly the transition elements are taken to include
those from scandium to zinc in the first long period, from yttrium to
cadmium in the second, and from lanthanum to mercury (excluding the 14
rare-earth metals from cerium to lutecium) in the third. AGI
A single point at which different phases of matter are capable of existing
together in equilibrium. Syn:inversion point