An iron ball attached to a long handle, used for driving caulking into seams and in a fight.

Related Terms

CALK

To fill seams in a wood deck with oakum or hammer the adjoining edges of metal together to stop leaks.

CAULK

To fill seams in a wood deck with oakum or hammer the adjoining edges of metal together to stop leaks.

SHELL EXPANSION

A plan showing the seams and butts, thickness and associated welding or riveting of all plates comprising the shell plating, framing, etc.

CALKING

Filling the seams of a vessels planking with oakum or cotton..

DUMB IRON

1. A rod for opening seams prior to caulking. 2. A rigid connector between the frame of a motor vehicle and the spring shackle.

HARD IRON

Iron or steel which is not readily magnetized by induction, but which retains a high percentage of the magnetism acquired

FERRIC ION

An iron atom that has a positive electric charge of +3. (Fe2+)

FERROUS HYDROXIDE

The reaction product of iron and water in the absence of oxygen; it remains soluble in the water Fe(OH)2.

INDUCED MAGNETISM

The magnetism acquired by soft iron while it is in a magnetic field. Soft iron will lose its induced magnetism when it is removed from a magnetic field. The strength and polarity of the induced magnetism will alter immediately as its magnetic latitude, or its orientation in a magnetic field, is changed. The induced mag- netism has an immediate effect upon the magnetic compass as the magnetic latitude or heading of a craft changes.

PAWLS

Iron fingers that click into notches in the barrel on a winch to prevent roll-back.

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