The registered trade name for a high purity, low carbon iron, used for Flinders bars, quadrantal correctors, etc., to correct magnetic compass errors resulting from induced magnetism.

Related Terms

ABSORBER

That part of the low side of an absorption system, used for absorbing vapor refrigerant.

DIELECTRIC STRENGTH

A measure of the ability of an insulating material to withstand electric stress (voltage) without failure. Fluids with high dielectric strength (usually expressed in volts or kilovolts) are good electrical insulators. (ASTM Designation D 877.)

ARMATURE DEMAGNETIZATION

The reduction in the effective magnetic lines of force, produced by the armature current.

CARBON RESIDUE

Coked material remaining after an oil has been exposed to high temperatures under controlled conditions.

REFRIGERATOR

A device to transfer heat from a low temperature to a high temperature medium.

REFRIGERATOR

A device to transfer heat from a low temperature to a high temperature medium.

ADSORPTION

Adhesion of the molecules of gases, liquids, or dissolved substances to a solid surface, resulting in relatively high concentration of the molecules at the place of contact; e.g. the plating out of an anti-wear additive on metal surfaces.

AIR GAP

The space between magnetic poles, or between the rotating and stationary assemblies in a motor or generator.

HALF-TIDE BASIN

A lock of very large size and usually of irregular shape, the gates of which are kept open for several hours after high tide so that vessels may enter as long as there is sufficient depth over the sill. Vessels remain in the half-tide basin until the ensuing flood tide before they may pass through the gate to the inner harbor. If entry to the inner harbor is required before this time, water must be admitted to the half-tide basin from some external source.

HALVING

The process of adjusting magnetic compass correctors so as to remove half of the deviation on the opposite cardinal or adjacent intercardinal headings to those on which adjustment was originally made when all deviation was removed. This is done to equalize the error on opposite headings.

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