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Electricity at the Columbian Exposition: Including an Account of the ...
John Patrick Barrett
No preview available - 2015
alarm alternating current ammeters amperes apparatus arc lamps arc lights armature arranged automatic battery bell belt binding posts brushes cables capacity carbon cell cent circuit clock coil commutator compound conductors connected consisted construction controlling copper core cut-outs designed device diameter direct current dynamo Edison ELECTRIC COMPANY Electricity building engine exhibit feet field furnished galvanometer glass grounds heat incandescent lamps incandescent lights inches installed instrument insulated iron lever located machine Machinery Hall magnetic manufacture means mechanical metal motor mounted operation placed plant plate pole potential railway resistance revolutions per minute rheostat ring rubber screws shaft shown shunt side signal space speed standard station subway switch switchboard telegraph telephone terminals Tesla motor tion tube tvpe various voltage voltmeter volts Western Electric wheel wire World's Columbian Exposition wound zinc
Page 501 - Building has an open portico extending along the whole of the south facade, the lower or Ionic order forming an open screen in front of it. The various subordinate pavilions are treated with windows and balconies. The details of the exterior orders are richly decorated, and the pediments, friezes, panels and spandrils have received a decoration of figures in relief , with architectural motifs, the general tendency of which is to illustrate the purposes of the building.
Page 500 - ... in height, and provided with skylights The second story is composed of a series of galleries, connected across the nave by two bridges, with access by four grand staircases. The area of the galleries in the second story is 118,546 square feet, or 2.7 acres. The exterior walls of this building are composed of a continuous Corinthian order of pilasters, 3 feet 6 inches wide and 42 feet high, supporting a full entablature, and resting upon a stylobate 8 feet 6 inches.
Page 501 - In the center of this niche, upon a lofty pedestal, is a colossal statue of Franklin, whose illustrious name intimately connects the early history of the Republic with one of the most important discoveries in the phenomena of electricity.
Page 416 - The current required is from 80 to 50 amperes at a pressure of 220 volts ; each motor is wound to develop fully 15 horsepower, though frequently in some veins of coal the machine only uses 30 amperes, or 7$ horse-power in making cuts.
Page 501 - The color of the exterior is like marble, but the walls of the hemicycle and of the various porticos and loggia are highly enriched with color, the pilasters in these places being decorated with scagliola and the capitals with metallic effects in bronze.
Page 501 - On the south there is aa pavilion semi-circular in form, 78 feet in diameter and 103 feet high. The opening of this niche is framed by a semi-circular arch, which is crowned by a gable or pediment with smaller gables on the returns and surmounted by an attic, the whole reaching the height of 142 feet. In the center of this niche, upon a lofty pedestal, is...
Page 373 - On each side of the copper oxide element in the larger type cells (but only on one side in the smaller types) is suspended a rolled zinc plate. These zinc plates are fastened by a bolt to a knob on the cover. This prevents any movement in the relative position of the elements, and does away with the necessity of using vulcanite separators to prevent any short circuits occurring in the solution. The zincs are amalgamated, and as in most i>ntteries, the zinc is attacked more vigorously near the top...
Page 500 - The rest of the building is covered with a flat roof, averaging 62 feet in height and provided with skylights. The second story is composed of a series of galleries connected across the nave by two bridges, with access by four grand staircases. The area of the galleries in the second story is 118,446 square feet, or 2.7 acres.
Page 109 - ... exposed. This is facilitated by the pole-pieces, which are hinged, as shown, and which can be turned out so as to show the armature completely, and allow it to be drawn out a sufficient distance for thorough repair, if necessary, without removing the shaft from the journal-bearings. The armaturecore is built up of iron wire, insulated by paper, the wire being wound on a cast-iron frame or skeleton having a T-section, which divides the core into two parts. The arms of the spider which holds the...