. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . kematters closely during the past few years proved brake was necessary if the trainswere to be stopped from the same speedsin the same time and distance as theywere formerly, or rather, a brake thatwould be more efficient and manifest agreater degree of safety at high speedswas necessary, and with this end in viewthe high-speed brake was designed. During the ten years, or up until1905. the high-speed brake was relied uponto stop trains from the highest speeds at-tainable, but a constant
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . kematters closely during the past few years proved brake was necessary if the trainswere to be stopped from the same speedsin the same time and distance as theywere formerly, or rather, a brake thatwould be more efficient and manifest agreater degree of safety at high speedswas necessary, and with this end in viewthe high-speed brake was designed. During the ten years, or up until1905. the high-speed brake was relied uponto stop trains from the highest speeds at-tainable, but a constant increase in theweights of cars and locomotives and thespeeds attained by our limited trains madenecessary the use of special apparatus,such as i8-in. brake cylinders and theL. N. passenger equipment. The L. N. equipment today is a veryriexible and efficient brake and answers allpurposes on cars whose weights do notexceed 100,000 pounds, but during 1909many passenger cars weighing up to 140,-00c or 150,000 pounds, were constructed,and it is here that the car builder metwith a practical WEbTINGHOUSE PASSENGER CONTROL APPARATUS. may be inclined to think that some of thebrake equipments rlesigncd during recentyears must have been unnecessary or hadbeen prematurely placed on the , those who have followed thedevelopment of the air brake know thateach equipment in its turn was necessary10 provide an elhcient brake, as the weightand speed of trains increased. Necessity is the mother of invention,and practically none of our modern me-chanical wonders were invented until theybecame a necessity, and the P. C. equip-ment i* no oxieption, because no airbrake imprnvcnuiil hat l)ccn of greaternecctfity since the introduction of theautomatic air brake itself. In the year ifl7S a train of cars couldbe stopped in .1 nasonablc <li!itance by theuse of ihc i|iii k . automatic brake,but in the year iHr;5 the wciRht »f engineand cars and the tpecd of trains bad
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