Railway and Locomotive Engineering . ill be readily understoodfrom the side view (Fig. 1), and planview (Fig. 2), which are reproduced fromFigs. S and 6 of the Winans Patent , in connection with the following ex-tract from the specification: The transportation of coal and allother heavy articles in lumps has beenattended with great injury to the cars—lequiring the bodies to be constructedwith great strength to resist the outwardpressure on the sides as well as the verticalpressure on the bottom, due, not only tothe weight of the mass, but the mobilityof the lumps among each other, tendi
Railway and Locomotive Engineering . ill be readily understoodfrom the side view (Fig. 1), and planview (Fig. 2), which are reproduced fromFigs. S and 6 of the Winans Patent , in connection with the following ex-tract from the specification: The transportation of coal and allother heavy articles in lumps has beenattended with great injury to the cars—lequiring the bodies to be constructedwith great strength to resist the outwardpressure on the sides as well as the verticalpressure on the bottom, due, not only tothe weight of the mass, but the mobilityof the lumps among each other, tendingto pack, as it is technically termed. Ex-perience has shown that cars on the oldmode of construction cannot be made tocarry a load greater than its own weight,but by my improvement I am enabled tomake cars of greater durability than thoseheretofore made which will transportdouble their own weight of coal, etc. The principle of my invention by whichI am enabled to attain this important endconsists in making the body, or a portion. extend down within the truck and betweenthe axles, thereby lowering the center ofgravity of the load. Another feature which is shown anddescribed in the patent, is a continuousdraw bar, which is secured to cross barsof the frame, its purpose being, as statedin the specification, to relieve the bodyfrom the strain due to the draft. Thedesign of continuous draw bar which waslater applied in the coal hoppers will behereinafter described. In the suit of Wbians vs. Denmead,which was brought for infringement of pounds each, carried 18,550 pounds ofcoal; that the thickness of the sheet ironof the bodies was 3/32 of an inch; andthe band around the top of the bodies was4x2 inches. The cars referred to wereused in the transportation of coal frommines near Cumberland to Baltimore. Theclaim of Mr. Winans that cars of hispatented design will transport doubletheir own weight of coal, etc., was thusshown to be not fully warranted, but alsomuch more moderate than
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