Stationary steam engines, simple and compound; especially as adapted to light and power plants . faces which can be readily repaired or replaced, when wornor cut, at small cost of time and money. The crosoheadis a compact, strong casting, having bearing surfaces extend-ing well out under the pin, and under the piston-rod socket,as well, and it is therefore not likely to cause those , due to springing the piston rod at this connec- ELECTRIC LIGHTING PLANTS. 87 tion, which have proved so costly in less well designed en-gines. The gibs which take the wear are removable andadjusta
Stationary steam engines, simple and compound; especially as adapted to light and power plants . faces which can be readily repaired or replaced, when wornor cut, at small cost of time and money. The crosoheadis a compact, strong casting, having bearing surfaces extend-ing well out under the pin, and under the piston-rod socket,as well, and it is therefore not likely to cause those , due to springing the piston rod at this connec- ELECTRIC LIGHTING PLANTS. 87 tion, which have proved so costly in less well designed en-gines. The gibs which take the wear are removable andadjustable. The main bearing is fitted with four-part boxesof babbitted cast iron, the side pieces so arranged that theymay be set out to a bearing as they wear. All the detailsare accordance with standard practice in this class ofengines, and description is not called for here. It may besafely assumed that this is the case in any successful engine,as good workmanship, the best materials, and a strong sys-tem of connections, are essential pre-requisites to even thebeginning of success. ®, J®.. Cylinder; Steam Valves. The valves and the valve-gear of the Cummer engine,as has been stated, belong to the Meyer system and con-sist of a main valve with the cut-off valve riding on theback of the main. There is this difference, however, be-tween the gear of this engine and others of the same gen-eral system : that here we find a separate system of exhaust STEAM ENCINES FOR valves which are worked independently of the steam valves^and thus leave the induction and eduction motions entirelyfree to be adjusted as the designer, the constructor, andthe user, may desire. The preceding engraving shows thedisposition of the valves in the cylinder casting, and thelarger cuts exhibit the method of driving them. The sec-tion of the cylinder, above, is made horizontally throughthe steam valve chest, and shows the main valve in section,with the cut-off valve riding upon it. At the left is a sectionso
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectsteamen, bookyear1902
