New York [etc.] Simmons-Boardman Pub. Co. [etc.] · leaf 42
of the pressuretube, as shown in Fig. 2, from which it will be seenthat the usual mechanism and multiplying devicesare dispensed with, since the motion of the tubeitself is positive and of sufficient range. The specialadvantage of this is evident, considering, that in allother pressure gauges, the… … ing devices must be delicately constructed andproperly cared for, and ^ven under the most favor-able conditions they are liable, at any moment, tobe a source of error. In the instrument illustrated, the tube is designedfor a range of 180 lbs. per square inch; for otherranges its sensitiveness may…
Railroads · Railroad cars
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