See:winding guide
Any joint between two pipes that permits one of them to be deflected
without disturbing the other pipe. Fay
A fine-grained, thin-layered variety of itacolumite. AGI
See:sternbergite
Consists of one or more idler rolls arranged to form a catenary trough.
This may be accomplished by mounting a single roll on a flexible shaft or
by linking a series of rolls with individual rigid shafts. NEMA, 2
The bending of the conveyor belt that takes place as it wraps around the
pulleys. The ply nearest the face of the pulley is under the minimum
stress and the ply farthest from the face is under the maximum stress.
Flexing stresses increase with a decrease in pulley diameters.
A patented circle brick, with book ends, used in domestic furnaces, cupola
furnaces, and acid tank linings.
With reference to a beam, the flexural center of any section is that point
in the plane of the section through which a transverse load, applied at
that section, must act if bending deflection only is to be produced, with
no twist of the section. Also called shear center. CF:torsional center;
elastic center; elastic axis. Roark
The slipping of sedimentary strata along bedding planes during folding.
AGI
A general term for a fold, warp, or bend in rock strata. A flexure may be
broad and open, or small and closely compressed. CF:monocline
Syn:hinge
A correction necessary in pendulum observations of gravity. The vibrating
pendulum produces oscillations of the receiver case, of the pillar, and of
the surface soil. Rather complex, coupled vibration phenomena arise and
the period of the pendulum itself changes. Numerous methods have been
suggested to correct for this influence or to eliminate it. Since the
correction is of the order of 10 x 10-7 to 40 x 10-7 s
on solid rock or cement and may increase to as much as 500 x 10-7
s on marshy ground, it must be determined accurately. AGI
A flexure fold in that the mechanism of folding is slip along bedding
planes or along surfaces of foliation. There is no change in thickness of
individual strata, and the resultant folds are parallel. AGI
a. The metal strap or crossbar attached to the drag chain of a
chain-and-flight conveyor. Jones, 1
b. A term sometimes applied to one conveyor in a tandem series.
A type of conveyor comprising one or more endless propelling media, such
as chain, to which flights are attached and a trough through which
material is pushed by the flights. See also:grit collector;
underground mine conveyor. Syn:bar flight conveyor
A line drawn on a map or chart to represent the planned or actual track of
an aircraft during the taking of aerial photographs. AGI
In an aeromagnetic survey or in another airborne geophysical survey, the
planned flying route used. AGI
A Tasmanian term for a variety of topaz. Fay
a. A term that has been considered as a mineral name for a massive, very
hard, somewhat impure variety of chalcedony (minute crystals of quartz
with submicroscopic pores). It is usually black or of various shades of
gray, breaking with a conchoidal fracture, and striking fire with steel.
Mohs hardness, 7; and sp gr, 2.65. Syn:firestone
b. Pulverized quartz of any type; e.g., "potters' flint" made by
pulverizing flint pebbles into powder.
c. A term that is widely used as a syn. of chert or for a homogeneous,
dark gray or black variety of chert.
A smooth, flintlike refractory clay rock composed dominantly of kaolin,
which breaks with a pronounced conchoidal fracture and resists slaking in
water. It becomes plastic upon prolonged grinding in water, as in an
industrial wet-pan unit. AGI
A device, formerly used to provide light for miners at work, in which
flints on a revolving wheel produce a shower of sparks incapable of
igniting combustible gases. See also:steel mill
A reverberatory furnace with a depression, well, or crucible in the middle
of the side of the hearth; used for the roasting and reaction process on
lead ores. Fay