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Title: |
1904 Article-Nichols & Shepard Co., Steam Traction Engine |
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English and American Steam Carriages and Traction Engines 1904 pgs 397-399 |
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Insert Date: |
8/29/2011 11:43:20 AM |
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THE NICHOLS AND SHEPARD CO. — The makers say: "If you don't buy your engine of us, you don't buy your engine right. We build our engines on honor, for we know our reputation is at stake— a reputation flawless and progressive for over half a century." Fig. 242 shows one of the firm's traction engines with a water-tank on the smoke-box. The axle is arranged near the centre of the fire-box shell; the countershaft is placed beneath the boiler barrel near the saddle-plate. The Corliss frame is used on this engine, but it is partly combined with a massive water-heater. It will be seen from Figs. 152 and 153, Chapter VII., that the hind axle passes beneath the boiler fire-box shell, and is made square its entire length. Over the square end a large sleeve is used, which gives greater wearing surface to the hub of the driving-wheel. The sleeve and driving-wheel are held in place by a nut and pin. The traction gearing is strong, and the pinions are made of steel. Round spokes are used for the driving-wheels cast into the hub and tire; the spoke-ends are riveted to the rim also. The cross strips are of malleable cast-iron, and specially formed for preventing sticky soils from filling them up. The crank-disc is forced on to the crank-shaft by screw-pressure.1 A long-stroke pump is worked from the cross-head. A good form of copper thimble, as shown in Fig. 241, is used for securing the boiler-tubes at the fire-box end. The Nichols-Shepard 13 horsepower traction engine, when running 225 revolutions per minute of the crank - shaft, travels at about three miles an hour. The weight of the engine in working trim is about 11,500 lbs. (5,166 tons). The engine will haul 20 tons on smooth, hard roads, working at 125 lbs. pressure per square inch. Compound traction engines are not listed by this firm. |
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1904 Nichols & Shepard Co., Steam Traction Engine
1904 Nichols & Shepard Co., Copper Thimble
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