[Electric engineering.] . Fig. 45. the lamp and the pole fixture and also to keep the linewires spread Fig. 46. §18 ELECTRIC LIGHTING. 83 Fig. 46 gives a view of a Cutter insulating the introduction of high-voltage enclosed arcs and theoperation of a large number of lamps per circuit, it is essen-tial that each lamp beprovided with a suspen-sion that will give highinsulation. The old-style, plain, woodencrosspiece with a porce-lain knob at each end ishardly sufficient. Some styles of mastarm are pivoted at thepole and are counter-balanced so that the armmay be swung dow
[Electric engineering.] . Fig. 45. the lamp and the pole fixture and also to keep the linewires spread Fig. 46. §18 ELECTRIC LIGHTING. 83 Fig. 46 gives a view of a Cutter insulating the introduction of high-voltage enclosed arcs and theoperation of a large number of lamps per circuit, it is essen-tial that each lamp beprovided with a suspen-sion that will give highinsulation. The old-style, plain, woodencrosspiece with a porce-lain knob at each end ishardly sufficient. Some styles of mastarm are pivoted at thepole and are counter-balanced so that the armmay be swung down fortrimming. Fig. 47 shows a Cut-ter pole fixture of small size that has been used considerablyfor street lighting with enclosed arcs. It supports the lampabout 3 feet from the pole. 95. The span-wire method of suspension is illustrated inFig. 48. It is the best form to use when it is desired to
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