. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . an open tube gaugelike this for engines using pressure un-der 60 lbs. and for steamboats usingunder 30 lbs. A sealed tube was usedfor higher pressures. Following this form were many,but the two that survived werethe Bourdon tube and the dia-phragm. The Bourdon tube is prac-tically the flattened pipe which we seein many steam gauges to-day, only now-adays it is held tightly in the middlewith the two ends free to move, whereasthe original type was held rigidly at oneend, leaving the other free
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . an open tube gaugelike this for engines using pressure un-der 60 lbs. and for steamboats usingunder 30 lbs. A sealed tube was usedfor higher pressures. Following this form were many,but the two that survived werethe Bourdon tube and the dia-phragm. The Bourdon tube is prac-tically the flattened pipe which we seein many steam gauges to-day, only now-adays it is held tightly in the middlewith the two ends free to move, whereasthe original type was held rigidly at oneend, leaving the other free to diaphragm gauge appeared in 1849and was made so that a yielding parti-tion or diaphragm divided, through thecenter, a chamber below the acting on this diaphragm Historical Gauges. People who are fond of lookingforward into the past, as an excitedpolitical orator once phrased it, are thekind of people who get a good idea ofwhat progress has been made in anygiven art or science. For instance, oneof the delvers into old things tells usthat the first pressure gauge ever made. SPRING RAIL SPLICE. moved its center up or let it come down,as the case might be, and the motionof the diaphragm was communicatedthrough a vertical spindle fastened toa rack into which a pinion carrying thepointer was geared. A later form of the diaphragmprinciple is that used by the UticaSteam Gauge Company, of NewYork, and their modification con-sists of a circular box, the lid and baseof which are made of corrugated metaland the edges flanged and locked to-gether above and below the level of thecorrugations by an elastic metal spring box is practically a capsule,of which the top and bottom corrugatedplates both move. The company havecompiled a little booklet on historicalpressure gauges, from which the factshere presented have been drawn. Theywill be happy to send a copy to anyonewho signifies his interest in the subjectby writing them; their illustrated cata-log
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
