A brake which consists of a block or shoe of wood bearing upon an iron or steel wheel.



Related Terms

BRAKE LINING

A covering, riveted or molded to the brake shoe or brake band, which presses against the rotating brake drum; made of either fabric or molded asbestos material.

BENDING BRAKE

A press brake for bending iron making sharply angular linear bends in sheet metal.

STEP

A block of wood on the keel, on which the heel of the mast rests.

BRAKE DRUM

A rotating cylinder attached to a rotating part of machinery, which the brake band or brake shoe presses against.

CHIP CAP

A plate or cap on the upper part of the cutting iron of a carpenter's plane designed to give the tool rigidity and also to break up the wood shavings.

DRY-BOX PROCESS

The passing of coke-oven or other industrial gases through boxes containing trays of iron oxide coated on wood shavings or other supporting material in order to remove hydrogen sulfide.

RIGGING CHOCK

A thick block of wood fixed outside the rails to take the chain plates for the shrouds

PIN

1) The axle on which a sheave revolves. 2) A length of wood or iron used to secure halyards and sheets.

ACIDITY

Represents the amount of free carbon dioxide, mineral acids, and salts (especially sulfates or iron and aluminum) which hydrolyze to give hydrogen ions in water; is reported as milliequivalents per liter of acid, or ppm acidity as calcium carbonate, or pH, the measure of hydrogen ion concentration.

SHIFTING BOARD

Portable bulkhead members, generally constructed of wood planking and fitted fore and aft in cargo holds when carrying grain or other cargo to prevent shifting when the ship is rolling

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