Locomotive appliances . mits of the reading of thegauge to be tested. 118 LOCOMOTIVE APPLIANCES The Star Gauge Tester, as illustrated in Fig. 40, isused precisely the same as that shown in Fig. 39, butin the cut the test gauge is not shown and the screwplunger is placed horizontally. An accurate testgauge is attached to one of the nipples (E E) and thegauge to be tested to the other nipple. Screwing inon the plunger wheel {D) increases the pressure of oilto any amount desired. The Utica Gauge Tester is clearly illustrated byFigs. 41 and 42. The latter engraving shows the square-inch testvalve,
Locomotive appliances . mits of the reading of thegauge to be tested. 118 LOCOMOTIVE APPLIANCES The Star Gauge Tester, as illustrated in Fig. 40, isused precisely the same as that shown in Fig. 39, butin the cut the test gauge is not shown and the screwplunger is placed horizontally. An accurate testgauge is attached to one of the nipples (E E) and thegauge to be tested to the other nipple. Screwing inon the plunger wheel {D) increases the pressure of oilto any amount desired. The Utica Gauge Tester is clearly illustrated byFigs. 41 and 42. The latter engraving shows the square-inch testvalve, which con-sists of a brassdisc provided witha pipe {A) to beconnected with aplunger (D), as inFig. 41. At B is ahardened steel valveand seat, the latterhaving knife edgesfor the valve (B) torest upon, and beingmade exactly onesquare inch in pipe (A) opensdirectly under thevalve, as shown bythe dotted lines. is intended toshow the use of thissquare inch valve in The Utica Gauge Tester. COnnCCtlOn With an. LOCOMOTIVE APPLIANCES. 119 ordinary screw plunger (D) and a test gauge at gauge to be tested is attached at F. Thepieces of iron attached to the bottom of the yoke,together with the valve and yoke itself, have beenpreviously weighted, so that the valve must liftand the water escape by the overflow pipe (G), themoment such known weight is exceeded by the waterpressure. The gauge to be tested should then indi-cate a pressure per square inch equal to the combinedweights of the valve, yoke, and weight attached. LOCOMOTIVE POP SAFETY VALVES. While there are a great many styles of pop safetyvalves used on locomotives, only the types especiallydesigned for this use are here described. The cause of boiler explosions is excessive pressure,and the fact that such disasters are of not infrequentoccurrence, whether arising from neglect or otherwise,points forcibly to the necessity of providing againstthem in every possible way. There are safeguardsagainst the danger o
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectlocomot, bookyear1901
