. The Street railway journal . FIG. 5.—TERMINAL PLATE FIG. 7.—WALKER CLAMPFOR FIELD COILS ~ a coil must have stout tape wound into its turns at inter-vals to hold it together. To do this a strip of tape is woundin between the layers and lapped over the first few turns ofthe next layer, as shown in Fig. 2. As the wire on mostrailway motor field coils is quite heavy, considerable ofthis taping must be done on every layer. Two sets of tapesmust be carried up, the one binding the layers that theother omits. As the wire is wound it should be carefullyinspected for breaks in the insulation, and wher
. The Street railway journal . FIG. 5.—TERMINAL PLATE FIG. 7.—WALKER CLAMPFOR FIELD COILS ~ a coil must have stout tape wound into its turns at inter-vals to hold it together. To do this a strip of tape is woundin between the layers and lapped over the first few turns ofthe next layer, as shown in Fig. 2. As the wire on mostrailway motor field coils is quite heavy, considerable ofthis taping must be done on every layer. Two sets of tapesmust be carried up, the one binding the layers that theother omits. As the wire is wound it should be carefullyinspected for breaks in the insulation, and where these arefound they should be carefully wrapped with cotton yarn,or, better still, covered with cloth or varnished paper, asshown in Fig. 3. The paper is looped about the wire overthe bare spot and the adjacent turns hold it in place. Tosecure the first and last wires so that they will not unwind,they should be tied with strong cord, as shown in Fig. 4,several cords being caught under the next to last turn andthe ends fi
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
