MODERN STEAM PRACTICE.

41S

sections, although the brasses are also fitted in lying on their side,in Order to adjust them in a direct line with the strain given off fromthe piston. The part of the bottom frame which forms the Con-nection between the cylinder and the condenser is retained, but thetop part is dispensed with, and a wrought-iron stay introduced,keyed through a boss bored out for its reception in the head orpillow block; on the other end of this stay a flange is formed forsecuring it by bolts and end keys to the cylinder at the side of thesteam jacket. Between the bottom part of the framing and thecylinder a bed plate is introduced, on which raised parts are castto receive what is termed the slipper guide plate for the crossheadof direct-acting single piston-rod arrangements. This part of theframing extends across the engine, embracing all the pillow blocksfor carrying the cranked shaft, which blocks are also cast entirealong with the bottom frame plate; but at the condenser end partsare cut out in the bottom having merely projections opposite thebearings for bolting to the condenser. This form of framinghas a strong yet light appear-ance, and cannot be excelledfor the peculiar type of enginefor which it is designed, as allthe parts are easily reached—-a great desideratum in themarine engine; while the wholeframework is firmly united tothe keelsons by one broad baseplate.

In another form of framing,

Fig. 302, we have the means oftightening up the main brassesby wedge pieces let into thepillow blocks. This frameextends from the cylinder tothe condenser, with ribs andfeathers cast along with, and *• Frame E ^ ÄlT“

in a direct line with the sides

of the pillow block or bearing piece, the cap for holding downthe brasses being placed on the top, instead of on the side as inthe previous examples. Between the brasses at the cylinder endtwo wedge pieces of wrought iron are introduced, extending across

F

Fig. 302.—Main Framing with Adjusting Wedges.