. The street railway review . ose-grained charcoal iron, as hardas is practical to machine them. The exhaust chambers are scp- The pistons are cored and made as light as is consistent withsafety. They have a follower ring and one sectional ring, whichis pressed out by spiral springs held in place by T-headed brassbolts. The pistons are forced on a taper and locked with a jamnut and keeper. The crosshead is of steel, with cast iron slippers lined with thephosphor babbitt, peened in, bored anil scraped to fit. Each slipperhas a wedge adjustment, which is entirely independent, hence theposition o
. The street railway review . ose-grained charcoal iron, as hardas is practical to machine them. The exhaust chambers are scp- The pistons are cored and made as light as is consistent withsafety. They have a follower ring and one sectional ring, whichis pressed out by spiral springs held in place by T-headed brassbolts. The pistons are forced on a taper and locked with a jamnut and keeper. The crosshead is of steel, with cast iron slippers lined with thephosphor babbitt, peened in, bored anil scraped to fit. Each slipperhas a wedge adjustment, which is entirely independent, hence theposition of the slipper is not changed by its movement. The slippersarc fastened to the crosshead by means of several steel bolts, thusrelieving the wedge bolts of any extra strain, and are so arrangedthat they may be easily removed. The piston rods are fastenedto the crosshead by thread, jam nut and keeper, The connectingrod is of the solid end pattern; the boxes are of bronze. The valve gear differs somewhat from the companys regular. HOOVEN-OWENS-RENTSCHLER VERTICAL ENGINE. arated from the cylinder walls by an air space, and the arrangementis such that there is a 2-in. space between tlic cylinder walls andlagging for non-conducting covering; the lagging is of sheet valves are located in the barrels to avoid the inconvenienceof having to disconnect the valve gear when the heads arc valves arc placed in such a manner, however, as to make theclearance about the same as if they were placed in the heads bybringing the exhaust valves partly within the cylinder walls, althoughat no time do the valves enter the space swept by the piston, whilethe piston is allowed to sweep past the ports. On the steam valveside the ports are so arranged that the incoming steam strikes thepiston squarely on the end, thus preventing any side shock orpound common to the vertical type of engine. Both steam andexhaust valves are double ported and have a very short travel, andare cored and mad
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