. Electrical world. made of a sheet of*paper 6^ in. wide, 9 in. long» .004 , rolled on a mandrel Yt in. in diameter and to be glued into : Black walnut, varnished, 11 in. long, i^ in. wide, H i- Shield: Annealed wrought iron pipe, €>% in. long. \Ya in. diameter inside,recessed as shown. Two caps % in. thick cut to fit to be secured by upsetting pipe after coil is in place. All to havetwo coats of black ; Best annealed wrought iron wire, cut 6^ in. long, varnished. Diameter of wire, .016 : To be of best white single silk
. Electrical world. made of a sheet of*paper 6^ in. wide, 9 in. long» .004 , rolled on a mandrel Yt in. in diameter and to be glued into : Black walnut, varnished, 11 in. long, i^ in. wide, H i- Shield: Annealed wrought iron pipe, €>% in. long. \Ya in. diameter inside,recessed as shown. Two caps % in. thick cut to fit to be secured by upsetting pipe after coil is in place. All to havetwo coats of black ; Best annealed wrought iron wire, cut 6^ in. long, varnished. Diameter of wire, .016 : To be of best white single silk covered copper wire. Diameter, .0142 m., Xo. 27 B. & S.; to be wound in two parts, each turns and a resistance, 14 ohms. Each part to have two : To be of best white single silk covered copper wire. Diameter, .0142 Xo. 27 B. & S.; to be wound in two parts, each having 1565 turns; resistance to be 21 ohms. Each part to have two to be wrapped with black seal Fig. 15.—A Group of Ixductiox Coils. SPECIFICATIONS FOR FIG. 11. Core: 200 soft iron punchings o. Diameter z%xYz in. Winding space, i^/io in. Heavy parafined paper insWinding; Inside wiring. Resistance, 50 ohms each. 2 Xo. 30 single cotton coOutside winding: Resistance. 100 ohms. German silver wire put oohm coils. ?ereu copper als: The terminals shall consist of two (2) strands of wire of the samedescription as that herein specified for the winding of the coil. Thatpart of the terminal which extends beyond the iron sheath shall becovered with a braided cotton covering. The terminals shall be securelysoldered to their respective terminal clips without the use of coil and its accessories shall be assembled and finished in a work-manlike manner. he fulfillment of the electrical requirements herein called for shall bedetermined by a comparative test for efficiency against a standard coiU nary test of this kind the probable final proportions of the most de-sirable co
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
