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Title: |
1878 Article-Marshall, Sons & Co., Double Cylinder Portable Steam Engine |
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Source: |
International Exhibition at Paris, 1878, pgs. 156-157 |
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Insert Date: |
2/14/2015 4:44:55 PM |
The boiler in this class of engine (Fig. 198) is flush throughout, and is lagged and cased the whole length; wrought-iron horn plates are riveted to the barrel, on the tops of which are bolted dovetailed castings for receiving the crank shaft carriages, which slide in these dovetails. Cylinders are cast in one piece with the valve chest, and have the inner barrel forced into the outer, as is done in the single-cylinder type of engine just described. They are mounted on the fire box shell crown plate, and are arranged with a flange all round the base, which enables them to be secured in their place in the stiffest manner possible: strong lugs are cast on the front end of cylinders, to which are attached wrought-iron tubular stays; these being connected at the other end with the sliding carriages of the crank shaft keep the cylinders and the crank shaft at the same distance from each other and exactly in the same position, while the boiler is free to expand and contract, thus reducing the strain upon it due to the working of the engine to a minimum.
A wrought-iron bridge plate is provided for receiving the governors, one end of’ the slide bars and the valve rods, and is supported by the tubular stays before mentioned. By this arrangement the bolt connections to the boiler are confined to the cylinders, the force pump being attached to one of the horn plates. The engine shown at the Exhibition was provided with an extra large fire box to burn any kind of inferior fuel, and fitted with a link motion reversing gear suitable for contractors’ work. |
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1878 Marshall, Sons & Co., Double Cylinder Portable Steam Engine
1878 Marshall, Sons & Co., Double Cylinder Portable Steam Engine (Specifications Chart)
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