Exhaust Line to Fires

The line which is traced on an indicator diagram from the time the exhaust valve opens until the piston reaches the end of its stroke.

The pipe which leads the exhaust steam from the cylinder to the atmosphere or the condenser.

The opening in the valve seat communicating with the exhaust passage and pipe.

That valve which controls the periodical release of steam from the cylinder.

That property of steam which enables a given quantity of it to fill an increasing volume at a decreasing pressure.

Working Steam Expansively. (See Cut Off.)

The mechanism for controlling the movements of the expansion valve.

A joint in a line of pipe which allows the pipe to expand or contract, the distance from end to end remaining constant.

The line traced on an indicator diagram from the time the steam valve closes until the exhaust valve opens.

The valve which shuts off the admission of steam to the cylinder before the piston has reached the end of its stroke.

A screw-bolt having a thread cut on one end and an eye formed at the other.

One of the floats or buckets of a feathering paddle wheel.

(See Paddle Wheel.)

One in which the blades can be twisted on the hub to present the least resistance to the water when being dragged by the vessel when under sail.

The pipe conducting the feed water from the feed pump to the boiler.

The pump which supplies the boiler with water.

The reservoir from which the feed pump draws its supply.

The water which is forced into a boiler to be evaporated into steam.

The filling in a corner formed by the intersection of two planes, or of a plane with a cylinder.

(See Grate Bars.)

One of the engineer force whose duty it is to supply fuel to and regulate the fires.

The space in front of the boilers from which the fires are worked.

(See Heating Surface.)

The burning fuel in the furnaces.

Banked Fires. The burning fuel is heaped up in one part of the furnace, leaving part of the grate bare, and covered with ashes or coal to check combustion, and yet keep the water hot in the boiler.

Hauled Fires. Fires are hauled when the burning fuel is pulled out of the furnaces onto the fireroom floor and the grate left entirely bare.

Spread Fires. Fires are spread by distributing the burning fuel over the grates and adding fresh fuel and supplying draft to hasten combustion.