Bore to Commutator

The inside cylindrical surface of an engine cylinder. Any cylindrical hole that has been turned out with a tool.

A small projection from the body of a piece, the end of which is surfaced to form a seating; or it is metal added to thicken a plate about a hole. The central body of a propeller wheel which supports the blades.

(See Brasses.)

A rod whose ends are secured to two parts of a boiler-shell to resist internal pressure.

Heel Brace. One having the ends turned up at an angle with the brace, forming a foot through which the rivet passes.

A stationary supporting arm. (See Strut.)

Technically, the brass wearing pieces about pins, in which they revolve or vibrate.

The thin metal structure, attached to a boiler, leading the products of combustion from the tubes to the smoke-pipe.

The metal in a valve seat separating the ports.

A structure forming a wall at the back of the furnace grate to bring the gases of combustion closer to the boiler.

(See Cock.)

The broad piece of plank or iron plate secured to the outer ends of the arms of a paddle wheel.

Space enclosed in which to stow fuel.

An annular shell for lining, or reducing the diameter of a hole.

A joint in boiler construction formed by bringing together the edges of two plates and holding them by a plate secured to both.

A long, narrow plate laid lengthways over butt joint, and riveted to both sheets.

An arrangement of pipes and valves whereby steam or water can be led out of its regular course past a given point and back to its course again.

The area of a group of openings in a boiler through which the products of combustion pass. An apparatus for determining the percentage of moisture in steam.

The iron as it comes from the ore by the process of smelting.

With a special tool, driving a part of the edge of one sheet against the other sheet at a riveted joint to make the joint tight.

A pump which, in general, consists of a number of blades mounted on a shaft and revolving with it, one blade following another. The whole is enclosed in a circular case. The suction pipe leads to a hole in the centre, of one or both sides of the case, and the discharge is through a nozzle at the circumference.

The plato or frame in a channel way to which the foot valve is secured.

The passage leading water from the bottom of the condenser to the bottom of air pump.

A valve in a pipe which operates automatically, allowing a fluid to pass it in one direction only.

A solid piece used to support the weight of sliding parts, or to fill space between two or more pieces.

An apparatus attached to a steam boiler by means of which the water is moved about in the boiler as soon as fires are started, equalizing the temperature of the water.

That pump which supplies the condensing water to a surface condenser.

That which is run through a surface condenser to absorb the heat from the exhaust steam.

The space between the piston when at the end of its stroke and the valve seat. Piston clearance is the space between the piston at the end of its stroke and the cylinder heads. In general, it may be said to refer to the amount by which two pieces are separated.

The ends of a connecting rod in which the brasses are held in place by a cap, bolts and nuts.

One of the engineer force whose duty it is to take the fuel from the coal bunkers and deposit it on the fireroom floor before the furnaces. Also known as a coal passer.

(See Coal Heaver.)

A contrivance for regulating the flow of fluids, the passage being through the movable part.

Brine Cock. A small cock attached to a boiler for drawing off samples of the water.

Gauge Cock, or Try Cock. A small cock inserted in a boiler-shell, at or near the water line, by which the height of the water within can be approximately determined.

An enlarged space in a boiler, beyond the furnace, where the gases may combine more thoroughly as their velocity is reduced.

The part of the armature of a dynamo or motor which transmits the current to or from the brushes.