. Locomotive engineering : a practical journal of railway motive power and rolling stock . ingfor a year or two. The pipe leading fromthe space inclosed by the packing strips—the relief pipe, we called it—was about 6inches long and I inch diameter; openeddirect into the engine-room. The reasonfor the pipe being so large was, that itwas put there by another party who hadmade a failure in trying to balance thatsame valve. After two or three days therewas scarcely a perceptible leak of thepacking, all of which leakage must passthrough this pipe, and after ten years useyou could safely place your
. Locomotive engineering : a practical journal of railway motive power and rolling stock . ingfor a year or two. The pipe leading fromthe space inclosed by the packing strips—the relief pipe, we called it—was about 6inches long and I inch diameter; openeddirect into the engine-room. The reasonfor the pipe being so large was, that itwas put there by another party who hadmade a failure in trying to balance thatsame valve. After two or three days therewas scarcely a perceptible leak of thepacking, all of which leakage must passthrough this pipe, and after ten years useyou could safely place your cheek withinan inch of the open end of the pipe. Thiswas not an exceptional, but a common in-stance. It should be stated that in the particu-lar instance mentioned, and others inci-dentally referred to. there was no possible parks, and the main ■ 0 and not a variabli in the I a locomotive—two very im-portant ii1 all first hanics and en- nd Richardson was both—when In- turned inventor rather in i atisfied with the balancepacking of his valve. He wanted to see. Locomotiei Engineering Fig. 6 BALANCED VALVE. how it would go some other way, and asthe sparks still worried him somewhat,he arranged for a continuous packing, asrepresented in Fig. 5. The central part ofthis piece c was slightly depressed, theoutside, as shown, packing against thepacking plate, instead of the four packingstrips. I never seriously believed thatRichardson thought this packing goodfor anything, which it certainly was he tried circular packing rings, asindicated in Fig. 6, but. as might havebeen anticipated from the variable travelof the valve, with no better results. In the beginning of his experiments,Richardson knew nothing of how muchpressure he could take from the valve andstill have it seat securely. Such informa-tion as he had. came from John Bournesstatement, in relation to the balancedvalve of Messrs. Penn. to the back ofwhich he says a ring is applied, of anarea equal to that
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