. La locomotiva. Ng, 4 piedi di diametro, fatto in tutto di ironnon meno di | di un pollice di spessore. La canna fumaria aveva un diametro di 22 pollici, e si estendeva fino alla fine. La caldaia è stata posta sopra un forno di riscaldo e riscaldata dai gas di scarico che entravano nella camera sotto la caldaia all'estremità posteriore, come indicato dalle frecce, Fig. 2, ha superato la lunghezza della caldaia a contatto con la sua metà inferiore, e la sua riandata attraverso il camino. La caldaia è stata sostenuta ad un'altezza, di 10 o 12piedi dal suolo da 3 coppie di staffe in ghisa, che sono state rivettate al gommaldano poggiato sul si

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. The Locomotive . ng, 4 feet diameter, made throughout of ironnot less than | of an inch thick. The flue was 22 inches diameter, and extended fromend to end. The boiler was placed over a re-heating furnace and heated by the wastegases which entered the chamber below the boiler at the rear end, as indicated by thearrows, Fig. 2, passed the length of the boiler in contact with its lower half, and returnedby way of the flue to the chimney. The boiler was supported at a height, of 10 or 12feet above the ground by 3 pairs of cast-iron brackets, which were riveted to the shelland rested upon the side walls. The boiler had flat wrought-iron heads flanged to theshell and flue, and stayed by 12 braces about 4 feet long, part of which were fastened toT-irons placed horizontally above the flue, one on each head, and the inner ends of thebraces were attached to the ring of shell-plates that joined each head, as shown by thedotted lines, s, s, etc., Fig. 2. This boiler was one of a system of 10 which were similarly. Fig. 1.—The dotted lines represent the unbroken part of the shell. The shaded portion at the left showsbroken by the fall. The shaded pcthatportion in flue outlines was blown out with the missing portion of the head at the right. the foremost parts of the shell broken by the fall. The shaded portion of the flue remained in the shell, and set and heated, all connected to two or more main steam-pipes, and each provided with asteam stop-valve, a safety-valve, and 3 gauge-cocks, but each did not have a steam-gauge.This particular boiler being without a steam-gauge, there was no means of ascertainingthe pressure when the stop-valve, D, was closed except by such indications as the 2-inchpatent lock-up safety-valve afforded. This boiler was supplied with water (the tempera-ture of which is not known, but probably variable) at intervals through the pipe A, Fig. 2, as often as it got low, and no doubt as rapidly as could be done with thepump or large injector. The blow-off

Parole chiave associate all'immagine

• bookcentury1800
• bookdecade1860