. Locomotive engineering : a practical journal of railway motive power and rolling stock . made of several different patterns, ofthe anti-friction type being the best and .ti-Friction Pipe Carrier. of these questions cannot be expected tobe so interesting or as useful. With those, however, who are daily re-quired to read and act upon the indicntions of the signals, a knowledge of tinconstruction will help them to put greatcifaith in the indications and to better un-derstand the precautions taken to insurethat a signal will not give a wrong indica-tion. The construction of the different
. Locomotive engineering : a practical journal of railway motive power and rolling stock . made of several different patterns, ofthe anti-friction type being the best and .ti-Friction Pipe Carrier. of these questions cannot be expected tobe so interesting or as useful. With those, however, who are daily re-quired to read and act upon the indicntions of the signals, a knowledge of tinconstruction will help them to put greatcifaith in the indications and to better un-derstand the precautions taken to insurethat a signal will not give a wrong indica-tion. The construction of the different ma-chines and the method of moving andlocking a switch having been explained ina previous article, the parts next to be con-sidered are those used in making the con-nections, or the means whereby the mo-tion of the levers is transmitted to theswitches and signals. Those for theswitches and locks are made of i-inch ironpipe, while for connections to the signalsthey are generally made of No. 9 galvan-ized steel wire. Pipe is used, as giving forits weight and section the greatest stiff-. frame, all friction being done away withwhen the pipe is moved, except that dueto rolling, which is verj- small. There be-ing no rubljing friction, no oil is requiredwith this style of carrier, and it is pos-sible to box them in, no covers beingneeded. The tendency of the pipe being to bendm any direction when power is applied, asmall roller is fixed in the top part of theframe of the carrier, to hold the pipe in thegroove in the lower wheel. As the lowerwheel has to carry the weight of the pipe,llie bearing seldom comes against the upper the ones now used in all new work. Theyare made as maj be seen in Fig. i, so as toallow the wheel which carries the pipe toroll on a center pin in a slot cast in the 753
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroa, bookyear1892
