. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . n the form of a T (Fig. 128) presented, right at thepoints, whose spacing was the same for all cross-ties, vertical rods terminatedby a notch, in which was brought, while resting on the screw with square head,a gage in the form of an inclined plane, whose divisions were calculated in amanner to correspond with a tenth of a millimeter. The inclination of theinclined plane had been so chosen that the interval between two divisions wasat least of 2 centimeters {fi^
. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . n the form of a T (Fig. 128) presented, right at thepoints, whose spacing was the same for all cross-ties, vertical rods terminatedby a notch, in which was brought, while resting on the screw with square head,a gage in the form of an inclined plane, whose divisions were calculated in amanner to correspond with a tenth of a millimeter. The inclination of theinclined plane had been so chosen that the interval between two divisions wasat least of 2 centimeters {fi^ inch), which allowed estimating the tenth of amillimeter with exactness. 174 STEEL RAILS The rule was fixed in an unchangeable manner to two stakes of strongdimensions, buried in the embankment about 1 m. 10 ( feet), in order toeliminate the influence of the load on the supports of the rule. When therule was in place, an observer introduced the wedge-shaped gage in the notch,while maintaining it horizontally on the head of the screw, and stopped it atthe moment when it commenced to become wedged; he then made a first read-. V ARRANGEMENT OF THE IRON RULE WHICH SERVED FOR MEASURING THE FLEXURES OF THE WOODEN ANO COMPOSITECROSS TIE AT REST AND UNDER LO/hO V I 38 /,!.
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Keywords: ., bookcentury1900, bookdecade1910, bookidsteelrailsth, bookyear1913
