. Electric railway review . ing, etc $ 3,484 Piles (214), 5,228 lineal feet 1,686 Reinforcing bars, 70,400 pounds 1,668 Concrete, 915 cubic yards at $ 8, Total $15,073 ABUTMENTS, OVERHEAD CROSSING. Total. Excavation, pumping, etc $ 2,837 Piles (290), 6,953 lineal feet 3,067 Reinforcing bars, 118,716 pounds 2,986 Concrete, 1,560 cubic yards at $ 14,040 Total $22,930 Per cubic yard of concrete placed. $ INVESTIGATION OF NEW YORK TRANSPORTATIONFACILITIES. $ Per cubic yard of concrete placed. $ $ A SIMPLE COMMUTATOR PRESS. One of the mo
. Electric railway review . ing, etc $ 3,484 Piles (214), 5,228 lineal feet 1,686 Reinforcing bars, 70,400 pounds 1,668 Concrete, 915 cubic yards at $ 8, Total $15,073 ABUTMENTS, OVERHEAD CROSSING. Total. Excavation, pumping, etc $ 2,837 Piles (290), 6,953 lineal feet 3,067 Reinforcing bars, 118,716 pounds 2,986 Concrete, 1,560 cubic yards at $ 14,040 Total $22,930 Per cubic yard of concrete placed. $ INVESTIGATION OF NEW YORK TRANSPORTATIONFACILITIES. $ Per cubic yard of concrete placed. $ $ A SIMPLE COMMUTATOR PRESS. One of the most essential operations in the building orrebuilding of commutators is to firmly press the segmentstogether so as to hold the mica securely and prevent oil anddust from getting between the segments. In small shops itis often difficult to properly press the segments together withas great a pressure as is desired, therefore the home-madepress here shown will be of interest. This commutator press was designed by C. E. Viallan-. Plan and Section of Commutator Press. court, foreman of the motor department of the West Madisonshops of the Chicago Union Traction Company. The pressconsists of a diagonally split steel shell, A, tapered towardboth ends, the slope being about one in ten. The insidediameter of the shell is just a little larger than the diameterof the assembled commutator which it is desired to presstogether. Two heavy steel rings, BB, fitting the shell, A, canbe drawn together by means of six or eight wrought-iron bolts,CC. It will be evident that the force with which the com-mutator segments and mica can be pressed together is onlylimited by the strength of the rings, BB, which are madeexceptionally heavy. This clamp can be used either for rebuilding old commu-tators or for new work. The method of using it is as follows:The bolts, CC, and the rings, BB, are removed and one of therings and the shell. A, are slipped over the assembled com-mutator bars and mica. The rings are
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectstreetr, bookyear1906
