. Le flange ir dell'ingegnere americano e del giornale ferroviario irrigidiscono il foglio. Dove la diagonale rimane trasversale ai laterals, i laterals sono doppiper evitare l'interferenza. L'anello di fango è largo 4 poll. Ai lati anteriori, ridotto a 31/2 poll. All'estremità posteriore. La corona è continua, estendendosi in un'unica piastra dall'estremità posteriore del focolare all'estremità anteriore della camera di combustione, la lamiera del tetto essendo realizzata allo stesso modo. La copertura del tetto è di 12 piedi lunghezza 3 poll. e lunghezza del foglio corona pari a 11 ft.5 poll. La cupola è cilindrica con una sella a cupola curva. Grate e Pan di cenere.- le grate sono dentro
1678 x 1489 px | 28,4 x 25,2 cm | 11,2 x 9,9 inches | 150dpi
Altre informazioni:
Questa immagine potrebbe avere delle imperfezioni perché è storica o di reportage.
. American engineer and railroad journal . ir flanges stiffen the sheet. Wherethe diagonal stays cross the laterals, the laterals are doubledto avoid interference. The mud ring is 4 in. wide at the frontand sides, reduced to 31/2 in. at the back end. The crown sheetis continuous, extending in a single plate from the back endof the firebox to the front end of the combustion chamber, the roof sheet being made in the same way. The roof sheetis 12 ft. 3 in. long and the length of the crown sheet is 11 ft.5 in. The dome is cylindrical with a curved dome saddle. Grates and Ash Pan.—The grates are in four sections, eachwith a separate shaking bar at the back head. The gratesare straight across the back end with a dip toward the center, increasing in depth toward the front. They are supportedat the sides by castings bolted to the firebox sheets, as shownin Fig. 8. These castings also extend across the front andback ends and carry the longitudinal central bearing bars June, 1900. AMERICAN ENGINEER AND RAILROAD JOURNAL. 163 — % MtUlln. % Studa J«8tudJ which are supported at the center of the firebox by the crossbearing bar. The grate bearing castings make tight Jointswith the firebox sheets against asbestos rope and they extendbelow the grates to carry the ash pan. The ends of the gratebars have sockets fitting over projections on the bearers insuch a way as to protect the bearings from accumulations ofashes. The cross bearer is lipped over a boss forged on theunder side of the mud ring and acts as a lateral brace at the center of the firebox as seen in Fig. 11. This figure also shows the bonnet placed over the end of the cross bearer where it passes through the ash pan. The grates have about 50 percent, of air space and are intended for both anthracite andbituminous coal. The ash pan is of 14-in. tank steel put together with % by2 by 2 in. angles and carefully fitted to be air tight. Thejoints with the firebox sheets are made with asbestos rope toprevent air from getting
