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.

POLARIZED-VANE AMMETER

An ammeter of only moderate accuracy in which the current to be measured passes through a small coil, distorting the field of a circular permanent magnet, and an iron vane aligns itself with the axis of the distorted field, the deflection being roughly proportional to the current.

PLUNGER-TYPE INSTRUMENT

Moving-iron instrument in which the pointer is attached to a long and specially shaped piece of iron that is drawn into or moved out of a coil carrying the current to be measured.

NONSKID

Pertaining to a surface that is roughened to reduce slipping, as a concrete floor treated with iron filings or carborundum powder, or indented while wet.

NEEDLE WEIR

A type of frame weir in which the wooden barrier is constructed of vertical square-section timbers placed side by side against the iron frames.

MAGNETIC PULLEY

Magnetized pulley device for a conveyor belt; removes tramp iron from dry products being moved by the belt.

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