An electrical device for indicating the presence of magnetic material in
an area.
Vertical angle through which a freely suspended magnetic needle dips from
horizontal. Pryor, 3
Aggregation of ferromagnetic atoms into a group, usually a fraction of a
micrometer in size, which lies among similar groups with random group
orientation. This cancels out any magnetic moment until or unless they all
are oriented by an applied magnetic field. Pryor, 3
a. These are declination, dip, and magnetic intensity in the horizontal
plane. Pryor, 3
b. The characteristics of a magnetic field that can be expressed
numerically. The seven magnetic elements are declination D, inclination I,
total intensity F, horizontal intensity H, vertical intensity Z, north
component X, east component Y. Typically, only three elements are needed
to give a complete vector specification of the magnetic field. AGI
Any feeder that uses magnetism to pick up, hold, separate, and deliver
objects.
a. Space surrounding a magnet or current-carrying coil, in which
appreciable magnetic force exists. Its intensity (H) is the force exerted
on a unit pole. Pryor, 3
b. A region in which magnetic forces would be exerted on any magnetized
bodies or electric currents present; the region of influence of a
magnetized body or an electric current. AGI
The force exerted on a unit pole is the field strength at that point.
AGI
Phenomenon that results from residual magnetism of ferromagnetic particles
that have bunched together under the influence of their individual polar
forces. Pryor, 3
A device used for the flow measurement of abrasive slurries. The
calibration is affected by the presence of magnetic constituents in the
slurry, and therefore, a pipe coil is also used to compensate the magnetic
flowmeter calibration for varying amounts of magnetic material in the
slurry. Nelson
a. Induced strength or flux density in a magnetic field, measured in
maxwells: B = 4pi /A + H, where B = the flux density, P = the strength of
each magnetic pole, A = the cross-sectional area of a cylinder through
which the flux flows, and H = the magnetic intensity in oersteds.
See also:magnetic intensity
b. The surface area times the normal component of magnetic induction B;
the number of magnetic field lines crossing the surface of a given area.
Expressed in maxwells in the cgs system. AGI
An instrument, designed but not applied, for measuring the gradient of the
magnetic intensity. AGI
A hoisting device that does its lifting by means of an electromagnet.
Crispin
See:hysteresis
a. Magnetic-flux density, symbolized by B. In a magnetic medium, it is the
vector sum of the inducing field H and the magnetization M. B is expressed
in teslas in SI and in gauss or gammas in the cgs system.
Syn:magnetic field
b. In a magnetic medium, the vector sum of the inducing field H and the
corresponding intensity of magnetization I, according to the relationship
B = H + 4pi I. AGI
c. A nonrecommended syn. of electromagnetic induction. AGI
d. The process of magnetizing a body by applying a magnetic field. This
usage is not recommended. AGI
A vector quantity pertaining to the condition at any point under magnetic
influence (as of a magnet, an electric current, or an electromagnetic
wave) measured by the force exerted in a vacuum upon a free unit north
pole placed at the point in question. Also called magnetic force.
Webster 3rd
See:magnetite
A device for measuring the liquid level in sumps and other vessels. It
consists of a loop of wire that is encased in a fiber glass protective
sheath. The loop is inserted in a sump of thickener containing a magnetite
or ferrosilicon slurry, and the electrical signal given off represents the
level of the slurry surrounding the loop. Nelson
The horizontal line that is oriented, at any specified point on the
Earth's surface, along the direction of the horizontal component of the
Earth's magnetic field at that point; not to be confused with isogonic
line. Syn:geomagnetic meridian
A geophysical prospecting method that maps variations in the magnetic
field of the Earth that are attributable to changes of structure or
magnetic susceptibility in certain near-surface rocks. Sedimentary rocks
generally have a very small susceptibility compared with igneous or
metamorphic rocks, and most magnetic surveys are designed to map structure
on or within the basement, or to detect magnetic minerals directly. Most
magnetic prospecting is now carried on with airborne instruments.
Dobrin
A magnetic field used in controlled-fusion experiments to reflect charged
particles back into the central region of a magnetic bottle. Lyman
a. That vector associated with a magnetized mass; the vector product of it
and the magnetic field intensity in which the mass is immersed (ignoring
the field distortion thereby produced) is a measure of the resulting
torque. Also called moment of a magnet. AGI
b. A vector quantity characteristic of a magnetized body or an
electric-current system; it is proportional to the magnetic-field
intensity produced by this body and also to the force experienced in the
magnetic field of another magnetized body or electric current. The
magnetic moment per unit volume is the magnetization. AGI