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But out at Menlo Park there was the first actual electric-lighting central station, supplying distributed incandescent lamps and some electric motors by means of underground conductors imbedded in asphaltum and surrounded by a wooden box. Mr. Insull says: "The system employed was naturally the two-wire, as at that time the three-wire had not been thought of.
They found an engine somewhat loose in the bearings, and there followed remarks which would not look well in print. Andrews skipped from under; he obeyed orders; I did not. But the plant ran, and it was the first three-wire station in this country." Seen from yet another angle, the worries of this early work were not merely those of the men on the "firing line." Mr.
There can only be about 10 or 12 miles more, but these weigh 80 or 100 tons. "July 5. "Our first mate was much hurt in securing a buoy on the evening of the 2nd. Pain is a terrible thing. Our work is done: the whole of the six-wire cable has been recovered; only a small part of the three-wire, but that wire was bad and, owing to its twisted state, the value small.
"10 P.M. This second length of three-wire cable soon got into the same condition as its fellow i.e. came up twenty kinks an hour and after seven miles were in, parted on the pulley over the bows at one of the said kinks: during my watch again, but this time no earthly power could have saved it.
This new plant takes high-tension polyphase current from a water-power thirty or forty miles away at Paderno, on the river Adda, flowing from the Apennines; but delivers low-tension direct current for distribution to the regular Edison three-wire system throughout Milan.
In addition to the actual measurement of the materials used for fences and buildings, the scope may be widened, where conditions warrant, to include estimates and calculations of the amount of the material used. For example, how many inches or feet of wire will be needed to make a three-wire fence of given length?
The strong position held by the Edison system, under the strenuous competition that was already springing up, was enormously improved by the introduction of the three-wire system; and it gave an immediate impetus to incandescent lighting.
The spreaders should be made of spruce, and should be 4 feet 10 inches long for a three-wire aerial and 7 feet 1 inch long for a four-wire aerial as the distance between the wires should be about 27 inches. The end spreaders can be turned cylindrically but it makes a better looking job if they taper from the middle to the ends.
The great importance of the "Feeder" and "Three-wire" inventions will be apparent when it is realized that without them it is a question whether electric light could be sold to compete with low-priced gas, on account of the large investment in conductors that would be necessary.
This installation of five thousand lamps on the three-wire system was made to illuminate the buildings at the Louisville, Kentucky, Exposition in 1883, and, owing to the careful surveys, calculations, and preparations of H. M. Byllesby and the late Luther Stieringer, was completed and in operation within six weeks after the placing of the order.
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