. The elements of railroad engineering . G is made of twopieces of steel railfitted and dovetailedtogether by machin-ery, without beingheated, and securelyriveted together. Theflange way betweenthe point and wingrails is maintained byclosely fitting ironthroat-pieces e and /(shown in the detailsections A and B),^ which are prevented^ from slipping by rivets^ and pins through theI rails. The clampsI % have side notches gat one end(shown in detail at Z.),which engage Avithnotches in the flangeat the frog point, andprevent the clampsfrom slipping down,even if loose. Theother end of the clampis be
. The elements of railroad engineering . G is made of twopieces of steel railfitted and dovetailedtogether by machin-ery, without beingheated, and securelyriveted together. Theflange way betweenthe point and wingrails is maintained byclosely fitting ironthroat-pieces e and /(shown in the detailsections A and B),^ which are prevented^ from slipping by rivets^ and pins through theI rails. The clampsI % have side notches gat one end(shown in detail at Z.),which engage Avithnotches in the flangeat the frog point, andprevent the clampsfrom slipping down,even if loose. Theother end of the clampis bent over a form toan exact angle to fitthe beveled split key,which is driven intothe space between theclamp and the block,which is fitted and se-cured to the side wingrail. When the key isdriven, the parts of 2 and. TRACK WORK. 1109 the frog are tightly bound together, and the key restingupon the flange of the rail is prevented from working downand loosening. The outer end of the clamp is secured byclips, which are riveted to the flange of the rail. In case the parts of the frog become loosened by wear,they may be tightened by driving the wedge further in andspreading the split ends so as to hold the key firmly in place. That part of the flange of the spring rail next to the frogpoint is planed off, allowing the head of the spring rail tolie close to the frog point, forming almost a continuous railand fully accommodating all classes of wheels passing thefrog. Powerful springs H and K hold the spring rail firmlyagainst the frog point, and the slide arm /-, which is held inplace by the clip /, attached to the slide plate (shown in thedetail section M N), prevents the spring rail from rising upor moving out too far. The usual length of this spring frogfor any angle is 15 feet. 1682. Crossing Frogs.â
Size: 1809px × 1381px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
