. American engineer and railroad journal . ââ â - - Cincinnati, Mi. TOP \ It W OF APRON. back angle on the V, overcomes any tendency to climb the wayswhen engaged on heavy work. These gibs are tongued in posi-tion on the carriage and they, together with the form of V, forma construction that automatically compensates for wear andmakes it unnecessary to give any attention to the adjustment ofthe gibs. Carefully designed wipers are provided, fitted with feltpads, which in addition to wiping off any grit also automaticallyoil the sliding surfaces. The spindle, as will be seen, is set back some di
. American engineer and railroad journal . ââ â - - Cincinnati, Mi. TOP \ It W OF APRON. back angle on the V, overcomes any tendency to climb the wayswhen engaged on heavy work. These gibs are tongued in posi-tion on the carriage and they, together with the form of V, forma construction that automatically compensates for wear andmakes it unnecessary to give any attention to the adjustment ofthe gibs. Carefully designed wipers are provided, fitted with feltpads, which in addition to wiping off any grit also automaticallyoil the sliding surfaces. The spindle, as will be seen, is set back some distance from thecenter of the shears, which not only gives an increased swingover the carriage, but at the same time permits the machine tobe used at full swing without the tool overhanging the bed. Thisgives great rigidity on work of large diameters. The apron is a one-piece box section casting, with all gearsand studs supported at either end. The top view clearly shows Si Ill M RER, 1900, AMERICAN ENGINEER WD RAILROAD fOURNA] 175. VIEW SHOWING OFFSET â >I SPINPLl ami SHAP1 OF GUIDES. the wide bearing by which it is attached to the carriage. Tintongue is accurately fitted tc the carriage and the apron is rigidlyheld in position bj four bolts of large diameter. This single boxsection form of apron dues away with the necessitj of an auxil-iary support at the lower end anil overcomes the difficulty ofuneven wear between such lower slides and the V on the top ofthe bed. The longitudinal and cross feeds are operated by a -ingle fric-tion, which, in addition to being of large diameter, is SO placedin regard to the gearing, that it has hut a slight duty to feeds are engaged in the apron by an in and out movementof the knob shown on the front. This moving member has acentral position, which disconnects all the gearing when a lath,is used for screw cutting. The apron is further provided with ..device which makes it impossible to engage the feed rod and lea IScrew at t
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
