International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 521
^ 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… … 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…
Railroad engineering
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