. Electric railway journal . View of the Pinless Tongue Switch with the Check PieceSet in Position Arranged in the body casting to provide a bearing. This con-struction, of course, makes it necessary to have a removablepiece on the check side of the body casting in order to plac :the tongue in position. This check piece is shown in place inone illustration and removed in another view. When in position it is held in place by a bolt and nut. The switch is made of Era manganese steel, and all bearingparts of the body castings and tongues arc ground carefullyto provide a perfect surface. PRECISION
. Electric railway journal . View of the Pinless Tongue Switch with the Check PieceSet in Position Arranged in the body casting to provide a bearing. This con-struction, of course, makes it necessary to have a removablepiece on the check side of the body casting in order to plac :the tongue in position. This check piece is shown in place inone illustration and removed in another view. When in position it is held in place by a bolt and nut. The switch is made of Era manganese steel, and all bearingparts of the body castings and tongues arc ground carefullyto provide a perfect surface. PRECISION TOOLS IN A RAILWAY SHOP The accompanying cuts illustrate the details and the as-semblies of a drilling jig for the accurate spacing of the holesin the brake hangers of various trucks; also a brush-holder. Details of Device for Accurate Drilling of Brake-Hanger Holes jig which avoids all necessity for counting the commutator barsto secure the correct mechanical and electrical assembly of thebrush holder parts. These tools are of home design and havebeen found very useful in the shops of a large electric railwaycompany. The brush holders when installed are set for a ten-
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
