and engineering journal . shows the Packing whenhrst put in. Fig. 2 shows the Packing underpressure, after it has adjusteditself to the rod and box. Thecompression of the cushions andthe shde of the wedges areclearly seen. DANIELS P. P. P. Rod Packing. p. p. p. reduces friction 75 to 93per cent , because the sliding wedgespress against the rod only on thebackward stroke and release thepressure on the forward stroke—atno time is the bearing on the rod inexcess of that necessary to keep itsteam-tight. P. P. P. is self-lubricating. Thecushion absorbs oil put on the rod orfed to t
and engineering journal . shows the Packing whenhrst put in. Fig. 2 shows the Packing underpressure, after it has adjusteditself to the rod and box. Thecompression of the cushions andthe shde of the wedges areclearly seen. DANIELS P. P. P. Rod Packing. p. p. p. reduces friction 75 to 93per cent , because the sliding wedgespress against the rod only on thebackward stroke and release thepressure on the forward stroke—atno time is the bearing on the rod inexcess of that necessary to keep itsteam-tight. P. P. P. is self-lubricating. Thecushion absorbs oil put on the rod orfed to the box and distributes thelubricant evenly and regularly. P. P. P. is elastic, due to the slid-ing of the wedges and the yielding ofthe compressible cushion. , P. P. P. lasts because it creates theleast friction, and the varying pressureprevents
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Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjectmineralindustries
