Dome Position
From the 1840s, boiler barrels were constructed from hoops of rolled iron, or later steel, sheet. As boilers were longer than the width of the available iron sheet, two or three hoops were required. For strength, the dome was always placed in the centre of a hoop, rather than spanning a joint. Early boilers used narrow plates and thus had a centrally located dome, in the centre of the middle hoop. Later boilers could use the wider plates then available and used two hoops, so as to reduce the number of riveted joints. These domes were thus placed at a quarter of the barrel's length (from the front of the firebox wrapper).
Read more about this topic: Steam Dome, Development
Famous quotes containing the words dome and/or position:
“Thus to him, to this school-boy under the bending dome of day, is suggested, that he and it proceed from one root; one is leaf and one is flower; relation, sympathy, stirring in every vein. And what is that Root? Is not that the soul of his soul?—A thought too bold,—a dream too wild.”
—Ralph Waldo Emerson (1803–1882)
“The word “jealousy” is often used as if it were synonymous with envy; but I think the distinction worth preserving. Jealousy is predominantly concerned with the fear of loss of something one possesses, envy with the wish to own something another possesses. Othello suffers from the fear that he has lost Desdemona’s love. Iago suffers from envy of the position held by Cassio, to which he feels entitled.”
—Anthony Storr (b. 1920)