Locomotive appliances . Fig. States Piston Rod Packing for Pistons with Enlarged Ends. babbitt rings 2 are the only parts that should touch therod, so that if the rod is once trued up perfectly roundand parallel it should wear very slightly and evenly. As most modern designers make piston rods withenlarged ends, Fig. 2 will show the provisions made LOCOMOTIVE APPLIANCES. 225 therefor, namely: the flange follower 3 and the vibrat-ing cup 6 are composed of two rings, the inside oneof which in each case is made in two halves. This packing should always be lubricated by an oilcup supplyin
Locomotive appliances . Fig. States Piston Rod Packing for Pistons with Enlarged Ends. babbitt rings 2 are the only parts that should touch therod, so that if the rod is once trued up perfectly roundand parallel it should wear very slightly and evenly. As most modern designers make piston rods withenlarged ends, Fig. 2 will show the provisions made LOCOMOTIVE APPLIANCES. 225 therefor, namely: the flange follower 3 and the vibrat-ing cup 6 are composed of two rings, the inside oneof which in each case is made in two halves. This packing should always be lubricated by an oilcup supplying oil to aswab cup. Fig. 3 shows the Gibbsvibrating cup, designedfor engines having an en-larged end on rod. It isrecommended as an im-provement over the regu-lar vibrating cup for thispurpose. This cup hasan inner ring, in designing new work,using this cup, it isdesirable to increase the diameter of stuffing box onehalf of an Fig. 3. Gibbs Vibrating Cup for Pistons with Enlarged Ends. UNITED STATES VALVE-STEM PACKING. It will be seen by reference to Fig. 4 that this pack-ing is very similar to the piston packing of the samemanufacture. A bushing or support, 9, is placedin the stuffing box to earn the weight of the valvestem. This support wears the valve stem less thanthe neck of the cylinder head formerly did, yet it iscertain to wear some flat place4 on the under side of thevalve stem the length of the valve travel when thereverse lever is hooked up in the position most when the valve is full stroked this Hat placewould travel farther into the packing rings, and cause 15 226 LOCOMOTIVE APPLIANCES. a bad leak. This has been overcome in the design ofthis packing, by the use of the long, extended gland7 and preventer 8, which render the distance betweenthe support 9 and the babbitt rings 2 slightly greaterthan the full valve travel.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectlocomot, bookyear1901
