On Brown's Tramway Locomotive
Proceedings of the Institution of Mechanical Engineers
Downloaded from JAN. 1880. BROWN'S TRAlUWAY LOCONOTIVE. 45 Droner0 sinceNovember 1879. I n addition to the above places where the engines are in regular work, they have been, or are, running on probation at Lisbon, Oporto, Turin, Brussels, Berlin, Cologne, Madrid, Milan, Monea, Villa Regoa, and Villa Reale (Portugal). I n most of the above places the consequence of these experiments has been that the question of steam traction versus animal traction has been decided in favour of the former; but
... of the former; but the carrying of this decision into execution has been frequently impeded by the conditions imposed by the local authorities, or by financial difficulties. I. Descr@tion of the Engine (Plates 1, 2, and a).-The leading principle of this engine is that of working with very high pressure (220 lbs. per sq. in.). The boiler (Figs. 2 and 3) consists of a vertical cylinder A, containing the fire-box in its lower part. To this is riveted, opposite the fire-door, a horizontal barrel B with tubes, like that of an ordinary locomotive ; this barrel is entirely below the water-level. The whole is made of steel, carefully selected and tested. The grate C is steeply inclined downwards from the fire-door, so as to increase its area and efficiency; and there is a drop-bar D at the bottom for letting down the fire. The ash-pan is provided with an ordinary door for regulating the draught. Owing to the height of the outer fire-box, there is a very great range of water-level (about 20 inches). Hence the driver need never attend to his fire or feed his boiler during the longest run usual on tramways. The cylinders E me horizontal and above the foot-plate, the steam chest being below the cylinders, by which arrangement they are always kept clear of water. There is a great range of expansion.