. Railway master mechanic . Style two wheeled swing i Wheels, (Paige steel tiredi lOin diameter haium n-d iron steel Win Prof. .1. B. Johnson, of Washington University atSt. Louis, has made a study of the results of thetests of metal brake beams which were conducted bythe Master Car Builders committee at Altoona, inJune, 1889, and in two letters addressed to the Na-tional Hollow Brake Beam Company he gives hisconclusions, together with some remarks on thequalities which should be found in a good give the following abstract of them: There are three important qualities required ina brake
. Railway master mechanic . Style two wheeled swing i Wheels, (Paige steel tiredi lOin diameter haium n-d iron steel Win Prof. .1. B. Johnson, of Washington University atSt. Louis, has made a study of the results of thetests of metal brake beams which were conducted bythe Master Car Builders committee at Altoona, inJune, 1889, and in two letters addressed to the Na-tional Hollow Brake Beam Company he gives hisconclusions, together with some remarks on thequalities which should be found in a good give the following abstract of them: There are three important qualities required ina brake beam; they are: strength, stiffness and elas-tic resilience, or springiness, that quality by whichthey may be able to resist shocks or blows, or sud-den jars. This latter quality of resilience is apt tobe opposed to that of stiffness, but it is very desirableto have both qualities represented in the same beamto a high degree. I find this to be true in your beams. Subplement to the RAILWAY MASTER l\/IEGHAI\IIG, June,
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Keywords: ., bookcentury1800, bookdecade1870, bookidr, booksubjectrailroadcars
