Locomotive appliances . Fig. 3. Huff Automatic Variable Exhaust. (Front View.) by which the gate valves may be operated from thecab independently of their control by the reverselever when the engine is cut back. The parts of thisauxiliary apparatus are shown in Fig. 3, and marked11, 12, 13, 14, 15. It has been stated that the drum or drums should befitted with a vent and valve to control the discharge of surplus steam to the atmosphe: in the particular 326 LOCOMOTIVE APPLIANCES. application shown by Figs. 1, 2 and 3 this vent andvalve were located on the lower side of one of thedrums (which wa
Locomotive appliances . Fig. 3. Huff Automatic Variable Exhaust. (Front View.) by which the gate valves may be operated from thecab independently of their control by the reverselever when the engine is cut back. The parts of thisauxiliary apparatus are shown in Fig. 3, and marked11, 12, 13, 14, 15. It has been stated that the drum or drums should befitted with a vent and valve to control the discharge of surplus steam to the atmosphe: in the particular 326 LOCOMOTIVE APPLIANCES. application shown by Figs. 1, 2 and 3 this vent andvalve were located on the lower side of one of thedrums (which was the only available point) and thevalve was adjustable by hand only; the lift shaft con-nection was, therefore, made with the gate valves i Fig. Automatic Variable Exhaust.(View from Under Side of Locomotive.) Service trials of the Huff variable auxiliary exhauston a double exhaust locomotive have shown a coalsaving of about sixteen per cent, on the ton mile is probable that this result was attributable to twoinfluences: first, a portion of each exhaust wasby-passed around to the other side and dischargedinto the stack through the nozzle which was not inaction at that time, thus both relieving the backpressure and making the exhaust into the stack moreregular and uniform than it otherwise would havebeen; second, by venting to the atmosphere throughthe vent on the under side of the drum any excess of LOCOMOTIVE APPLIANCES. 327 steam over and above what was necessary to developsufficient blast under the particular circumstancesand conditions then existing. THE WALLACE & KELLOGG AIR-PUMP EXHAUSTFEED-WATER HEATER AND CYLINDER LUBRI-CATOR. The construction of this appliance is as follows:A three-way cock is
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectlocomot, bookyear1901
