. The Street railway journal . FIG. THE MOLD ON THE MOTOR BEFOREWELDING. FIG. 4.—PLACING THE COVER AROUND THE MOLD and dirt which may be on it. It is then heated to a cherryred in the forge fire, after which it receives a thoroughcleaning with a wire brush to remove ariy remaining is then ready for welding. In Fig. 2 motor frame andmolds used in making the weld are shown together. Theseparts are dried by the fire until all moisture is molds are made half and half of brick clay and sandand are made from a pattern of the same shape as the March 2, 1907.] STREET RAI
. The Street railway journal . FIG. THE MOLD ON THE MOTOR BEFOREWELDING. FIG. 4.—PLACING THE COVER AROUND THE MOLD and dirt which may be on it. It is then heated to a cherryred in the forge fire, after which it receives a thoroughcleaning with a wire brush to remove ariy remaining is then ready for welding. In Fig. 2 motor frame andmolds used in making the weld are shown together. Theseparts are dried by the fire until all moisture is molds are made half and half of brick clay and sandand are made from a pattern of the same shape as the March 2, 1907.] STREET RAILWAY JOURNAL. 385 original casting. Fig. 3 shows a workman placing themold on the motor in position for the weld. Fig. 4 illustrates the next stage in the process, which isthat of placing the cover around the mold. This cover isused to hold the sand required to stop the fine cracks inthe mold; otherwise thermit when in the fluid state wouldescape through the small openings, and the use of the sandhas been found desirable for this purpose. Fig. 5 showsthe cover and surrounding
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
