THE PROPORTIONING OF ELECTRODES FOR FURNACES Carl Hering Vol. xxix-1910, pp. 485-534 Analytical and experimental investigation of furnace electrode losses under furnace conditions with electrodes of various materials, developing simple laws for proportioning electrodes to operate with minimum loss. The tests, among other properties, give the electric resistivity and the thermal conductivity of graphite, iron and copper over wide ranges of temperature. Discussion, pp. 535-545, by Messrs. A. E. Kennelly, and E. F. Northrup. Thermal conductivities and temperature coefficients of electrode materials. Development of other formulas for proportioning electrodes. Frank W. Brady B. MINING ELECTRICITY IN MOUNTAIN MINES Vol. xviii-1901, pp. 191-201 Difficulties encountered in mountain transportation of machinery. Description of typical cases of mountain transportation: burro, aerial, wire rope and wagon road. Discussion, pp. 202-206, by Messrs. N. S. Keith, C. O. Mailloux, Ralph W. Pope, and Carl Hering. Ralph L. Montagu THE ELECTRICAL EQUIPMENT OF A GOLD DREDGE Vol. xxii-1903, pp. 507-518 Description of gold dredge and the power requirements of the various machines used in its operation. Directions and diagrams for wiring a typical dredge. No discussion. SOME NOTES ON CERTAIN UNDERGROUND HOISTING PROBLEMS A. W. K. Pierce Vol. xxii-1903, pp. 553-559 General discussion of the advantages of electric motive power for mine hoists. The nature of the load requirements, choice of the acceleration curve and method of control. No discussion. ELECTRIC MINE HOISTS D. B. Rushmore and K. A. Pauly Vol. xxix-1910, pp. 249-290 General discussion of the advantages of electric mine hoisting, with typical hoist load diagrams for different types of hoists, followed by brief description and analysis of the performance of four typical electrical hoisting systems. Estimated cost and energy consumption. Discussion, incorporated with that of Mr. Wilfred Sykes' paper on "Large Electric Hoisting Plants." LARGE ELECTRICAL HOISTING PLANTS Wilfred Sykes Vol. xxix-1910, pp. 291-322 Analytical and graphical methods of calculating the load diagrams of various types of hoists, followed by a description of the Ilgner, the converter, and the booster balancing systems, together with instructions for pre-determining their performance curves under given conditions. Economy of electric hoisting. Discussion, including that of paper by Messrs. D. B. Rushmore and K. A. Pauly on "Electric Mine Hoists," pp. 323-325, by Mr. Edward J. Cheney. Formulas for the calculation of motor horse-power and motor rating for hoisting service. TESTS OF AN ILGNER ELECTRIC HOIST R. R. Seeber, Vol. xxix-1910, pp. 327-337 Brief description of electric hoisting plant of Winona Copper Company, with an account of tests and results. Comparison of actual coalto-rock ratios for electric and steam hoists and observed performance curves of the Ilgner system. No discussion. Brent Wiley C. STEEL MILLS CHARACTERISTICS OF MOTORS FOR LARGE SHEARS Vol. xxvii-1908, pp. 321-334 Discussion of the characteristics of different types of direct-current and alternating-current motors for driving large bloom shears, with actual load curves and full data of the machines tested. No discussion. THE INDUSTRIAL APPLICATION OF THE ELECTRIC MOTOR AS ILLUSTRATED IN THE GARY PLANT OF THE INDIANA STEEL COMPANY B. R. Shover Vol. xxviii-1909, pp. 101-146 Description of electrical equipment of the Gary plant, with data on motor sizes and power required to operate steel-making machinery. Discussion, pp. 147-161, by Messrs. B. A. Behrend, Gano Dunn, William T. Dean, Brent Wiley, Robert Hull, David B. Rushmore, Louis A. Ferguson, and B. R. Shover. Additional data on and description of steel-making machinery. Design and operative features of large gas engines for parallel working. FUNCTION OF FLY-WHEELS IN CONNECTION WITH ELECTRICALLY H. C. Specht ples chosen to indicate the most economical combination for driving a given plate and rail mill. Discussion, incorporated with that of Mr. R. Tschentscher's paper on "Electric Power Problems in Steel Plants." E. W. Yearsley ROLLING MILL MOTORS Vol. xxviii-1909, pp. 879-880 General requirements of rolling mill motor equipment. Discussion, incorporated with that of Mr. R. Tschentscher's paper on "Electric Power Problems in Steel Plants." E. Friedlander ELECTRIC DRIVEN ROLLING MILLS Vol. xxviii-1909, pp. 881-887 General discussion of the advantages of electric drive in rolling mills. Discussion, incorporated with that of Mr. R. Tschentscher's paper on "Electric Power Problems in Steel Plants." POWER REQUIREMENTS FOR ROLLING HIGH CARBON STEEL OF SMALL SECTION Brent Wiley Vol. xxviii-1909, pp. 889-895 Description of tests made on a merchant mill, giving tabulated data and recording wattmeter charts. All-day record of rolling mill, giving output, operating time, lost time, energy consumption, friction load, etc. Discussion, incorporated with that of Mr. R. Tschentscher's paper on "Electric Power Problems in Steel Plants." C. F. Henderson ELECTRIC CONTROL FOR ROLLING MILL MOTORS Vol. xxviii-1909, pp. 897-912 Brief outline of essential requirements of controllers for motors operating ore handling machinery and rolling mills, with description of contactor type controller and various applications of automatic controllers in and about a steel mill. Discussion, incorporated with that of Mr. R. Tschentscher's paper on "Electric Power Problems in Steel Plants." ELECTRIC POWER PROBLEMS IN STEEL PLANTS R. Tschentscher Vol. xxviii-1909, pp. 921-930 Classification of steel mills and brief general discussion of power requirements of each type, together with analytical discussion of the economic value of low-pressure steam turbines in utilizing waste heat and of over-excited synchronous converters in improving power-factor, the latter being developed with special reference to application in the South Chicago plant of the Illinois Steel Company. Discussion, pp. 931-946, by Messrs. David B. Rushmore, Brent Wiley, K. A. Pauly, M. O. Delplain, S. Lankton Clark, H. C. Specht, Charles F. Scott, John C. Reed, H. E. White, A. M. Dudley, H. K. English, Arthur C. Eastwood, and Arthur Simon. General discussion of design, control and operation of induction motor drive for rolling mills. Calculation of fly-wheel capacity. Detailed description of control system used on Hulett ore unloader. INTERACTION OF FLY-WHEELS AND MOTORS WHEN DRIVING ROLL TRAINS BY INDUCTION MOTORS F. G. Gasche Vol. xxix-1910, pp. 1385-1402 General discussion of the application of fly-wheels to roll mill drive, followed by mathematical analysis of the forces acting in an induction motor fly-wheel set when coupled to a roll train, with a full mathematical development of the equations. Discussion, pp. 1403-1414, by Messrs. C. P. Steinmetz, C. F. Scott, Gano Dunn, Selby Haar, W. W. Crawford, and F. G. Gasche. Short-cut methods of calculating the performance of fly-wheel induction motor drive for roll trains. D. HEATING NOTES ON THE ELECTRIC HEATING PLANT OF THE BILTMORE ESTATE Chas. E. Waddell Vol. xxvii-1908, pp. 651-666 Actual performance of large electric heating system for laundry, comparing this service with that of fuel-generated steam system, with respect to first cost of operation and convenience. Discussion, pp. 667-668, by Messrs. Percy H. Thomas, Elmer A. Sperry, Charles E. Waddell, and John H. Finney. Details of the electric steam generator and results of tests showing the fuel equivalent for one kilowatt hour. ELECTRIC HEATING W. S. Hadaway, Jr. Vol. xxvii-1908, pp. 1585-1598 General discussion of the relative merits of electric energy and other forms of energy for operating a heat distribution system. Suggested plan for heating service in which electricity and steam are both used, one for general low-temperature heating and the other for high-temperature and localized heating. Discussion, pp. 1599-1612, by Messrs. Charles E. Waddell, W. N. Ryerson, W. S. Andrews, H. P. Ball, Max Lowenthal, Charles P. Steinmetz, Townsend Wolcott, and W. S. Hadaway, Jr. Storage of heat energy to improve load factor. tric heating of large buildings. Data on heating cussion of thermodynamic heating process. Experience with elecelement design. Dis E. MISCELLANEOUS THE OPERATION OF MACHINE SHOPS BY INDIVIDUAL ELECTRIC MOTORS R. T. E. Lozier Vol. XX-1902, pp. 115-126 effect on economy of Review of electrical Load factor in machine shop practice and its various methods of supplying motive power. methods of speed control, going over respective limitations. Advantages of individual motor drive in high efficiency shop operation. Discussion, incorporated with that of paper by F. O. Blackwell on "Continuous Current Motors for Machine Tools." H. P. Coho THE STORAGE BATTERY AS A FACTOR IN SPEED CONTROL Vol. XX-1902, pp. 135-138 Brief description of electric drive for Hoe printing press, using storage battery for multi-voltage. Discussion, incorporated with that of paper by F. O. Blackwell on "Continuous-Current Motors for Machine Tools." ELECTRICALLY OPERATED COAL HOIST HAVING VARIABLE SPEED CONTROL P. H. Keilholtz Vol. xx-1902, pp. 139-142 Brief discussion of electric coal hoist equipped with Ward-Leonard system of speed control. Tests of power required, speed-time curves and other operative data. Discussion, incorporated with that of paper by F. O. Blackwell on "Continuous-Current Motors for Machine Tools." Geo. W. Fowler A SERIES-PARALLEL SYSTEM OF SPEED CONTROL Vol. xx-1902, pp. 143-153 Description of controller and its mode of operation as applied to double commutator motor driving webb press. Discussion, incorporated with that of paper by F. O. Blackwell on "Continuous-Current Motors for Machine Tools." F. 0. Blackwell CONTINUOUS CURRENT MOTORS FOR MACHINE TOOLS Vol. xx-1902, pp. 159-165 Power characteristics and requirements of various classes of machine tools. Brief mention of the different methods of speed control of electric motors and the advantages and limitations of each. Discussion (including that of paper by R. T. E. Lozier on "The Operation of Machine Shops by Individual Electric Motors;" paper by N. W. Storer on "Three-Wire System for Variable Speed Motor Work;" paper by H. B. Coho on "The Storage Battery as a Factor in Speed Control;" paper by P. O. Keilholtz on "Electrically Operated Coal Hoist Having Variable Speed Control;" paper by George W. Fowler on "A SeriesParallel System of Speed Control," and paper by H. Ward Leonard on "Multiple Unit, Voltage Speed Control for Trunk Line Service"), pp. |