E. M. Hewlett OIL SWITCHES FOR HIGH PRESSURES Vol. xxiii-1904, pp. 215-216 Comparison of oil-break with air-break switches. Discussion, pp. 217-224, and 242-245 and 249-251, by Messrs. C. C. Chesney, F. A. C. Perrine, Alex Dow, Ralph D. Mershon, C. F. Scott, P. N. Nunn, C. L. de Muralt, H. F. Parshall, W. W. Blanck, James Lyman, P. Junkersfeld, W. G. Carlton, E. O. Sessions, G. N. Eastman, I. E. Brooke, P. H. Thomas, R. F. Schuchardt, Edw. Schildhauer, H. F. Sanville, and W. C. L. Eglin. Experience with oil switches in many large plants. Accounts of tests under short-circuit conditions. Specifications for oil switches and brief reference to some of the mechanical difficulties encountered with present types. TIME-LIMIT RELAYS George F. Chellis Vol. xxiv-1905, pp. 247-259 Classification of time-limit relays. Ideal requirements of relays for the protection of alternating-current generators, feeders and synchronous converters. Characteristic performance curves of relays under various conditions. Wiring diagrams for relay connections. Discussion, incorporated with paper by H. W. Buck on “Duplication of Electrical Apparatus to Secure Reliability of Service." SWITCHBOARD PRACTICE FOR VOLTAGES OF 60,000 AND UPWARDS Stephen Q. Hayes Vol. xxvi-1907, pp. 1333-1357 Brief general discussion of factors which enter into the choice and arrangement of control apparatus in high-tension plants, with special reference to oil switches and circuit breakers. Designs for 60,000 and 100,000-volt stations given to demonstrate the relative space required. Discussion, pp. 1358-1362, by Messrs. P. M. Lincoln, F. B. H. Paine, D. B. Rushmore, H. W. Buck, J. B. Taylor, William McClellan, W. N. Smith, L. C. Nicholson, S. Q. Hayes, J. H. Finney, F. G. Baum, and Ralph D. Mershon. Use of extra line wire for emergency service. Method of tying conductors to pin type insulators. THE MODERN OIL SWITCH WITH SPECIAL REFERENCE TO SYSTEMS OF A. R. Cheney Vol. xxix-1910, pp. 1091-1108 Analytical discussion of the present status of oil switch construction, pointing out lines along which future progress is apt to take place. Record of performance of 90 oil switches in actual service. Discussion, pp. 1109-1124, by Messrs. Peter Junkersfeld, Ford W. Harris, C. W. Stone, D. B. Rushmore, C. P. Steinmetz, W. I. Donshea, V. Karapetoff, G. F. Sever, A. R. Cheyney, and E. M. Hewlett. General remarks on design and operation of oil switches. Experience in operation and results of experimental study. 17. TRACTION A. RAILWAY SYSTEMS NOTES ON MODERN ELECTRIC RAILWAY PRACTICE Albert H. Armstrong Vol. xviii-1901, pp. 589-601 Consideration of the requirements of different classes of electric railway service leading up to a discussion of the relative merits of directcurrent series and induction motors for interurban and trunk line operation. Discussion, incorporated with that of paper by Ernst J. Berg on “Electric Railway Apparatus." Ernst. J. Berg ELECTRIC RAILWAY APPARATUS Vol. xviii-1901, pp. 603-630 Discussion of the characteristics and limitations of generators, converters, motor-generators and motors for different kinds of electric railway service. Extended consideration of the relative merits of direct-current series, and polyphase induction motors in a given numerical instance, comparing performance, efficiency and cost. Discussion (including that of paper by Albert H. Armstrong on "Notes on Modern Electric Railway Practice"), pp. 631-666, by Paul Janet, Charles P. Steinmetz, G. Gillon, Charles Janisch, Bion J. Arnold, C. O. Mailloux, E. P. Roberts, L. B. Stillwell, A. H. Pott, C. F. Scott, P. K. Stern, H. C. Spaulding, F. S. Holmes, Ernst J. Berg, A. H. Armstrong, and N. C. Sawers. General remarks on the stability of the induction motor for traction purposes. SOME NOTES ON EUROPEAN PRACTICE IN ELECTRIC TRACTION WITH Carl L. DeMuralt Vol. xix-1902, pp. 499-526 Development of polyphase traction system in Europe, with brief descriptions of the various roads that have been equipped with this system, and results of various tests showing the performance curves of the motors under actual service conditions. Discussion, incorporated with that of paper by Ernst Danielson on "A Novel Combination of Polyphase Motors for Traction Purposes." A NOVEL COMBINATION OF POLY-PHASE MOTORS FOR TRACTION PURPOSES Ernst Danielson Vol. xix-1902, pp. 527-539 Description of a system of concatenating two motors of unequal numbers of poles so as to get four running speeds. Comparison of acceleration characteristics, torque, energy, efficiency, etc., with direct-current series, plain induction and concatenated induction motors. Abstracted by Dr. Charles P. Steinmetz on page 495. Discussion (including that of paper by Carl L. DeMuralt on "Some Notes on European Practice in Electric Traction With Three-Phase Alternating-Current"), pp. 540-555, by Messrs. C. P. Steinmetz, C. O. Mailloux, Henry G. Stott, W. N. Smith, W. J. Hammer, Townsend Wolcott, Frederick V. Henshaw, and C. L. DeMuralt. NEW ELECTRO-PNEUMATIC SYSTEM OF ELECTRIC RAILWAY CONSTRUCTION Bion J. Arnold Vol. xix-1902, pp. 1003-1006 Announcement of the system and outline of its advantages. Discussion (including that of paper by A. H. Armstrong on "A Study of the Heating of Railway Motors;" paper by B. J. Arnold and W. B. Potter on "Comparative Acceleration Tests With Steam Locomotive and Electric Motor Cars;" paper by B. J. Arnold on “Method of Accelerating by Means of a Dynanometer Car, the Power Required to Operate the Trains of the New York Central and Hudson River Railroad Company Between Mott Haven Junction and the Grand Central Station, and the Relative Cost of Operation by Steam and Electricity;" and paper by C. O. Mailloux on "Notes on the Plotting of Speed-Time Curves"), pp. 1007-1019, by Messrs. F. J. Sprague, F. S. Pearson, Oberlin Smith, S. T. Dodd, C. P. Steinmetz, H. Ward-Leonard, Harry Alexander, A. H. Armstrong, W. B. Potter, B. J. Arnold, and C. O. Mailloux. General remarks on the applications of electric motive power to steam railroads. WASHINGTON, BALTIMORE & ANNAPOLIS SINGLE-PHASE RAILWAY B. G. Lamme Vol. xx-1902, pp. 15-30 Announcement of the first single-phase railway in the United States, with general description of the plant and discussion of the advantages of this system over the direct-current system. Discussion, pp. 31-49, by Messrs. Charles P. Steinmetz, Ralph D. Mershon, W. E. Goldsborough, Bion J. Arnold, W. S. Franklin, Norman Rowe, C. O. Mailloux, Joseph Sachs, W. M. C. Gotshall, Herbert A. Wagner, Elias E. Ries, B. G. Lamme, P. K. Stern, C. F. Scott, and N. W. Storer. Opinions as to the principal feature of the single-phase railway motor. Repulsion vs. series alternating-current motors. MULTIPLE UNIT, Voltage SPEED CONTROL FOR TRUNK LINE SERVICE H. Ward Leonard Vol. xx-1902, pp. 155-158 Enumeration of the essential features and advantages of the author's method of operating electric locomotives from single-phase distribution system. Discussion, incorporated with that of paper by F. O. Blackwell on "Continuous-Current Motors for Machine Tools." Charles P. Steinmetz THE ALTERNATING-CURRENT RAILWAY MOTOR Vol. xxiii-1904, pp. 9-25 Brief account of early work with compensated series commutator single-phase motor. Design data given for motors built by Eickemeyer and actual performance characteristics of this motor compared with calculated performance of repulsion motor. Analytical theory of single-phase repulsion motor. Discussion (including that of paper by Walter I. Slichter on "SpeedTorque Characteristics of the Single-Phase Repulsion Motor"), pp. 2681, by Messrs. B. G. Lamme, A. S. McAllister, B. J. Arnold, Charles P. Steinmetz, P. M. Lincoln, W. I. Slichter, Ralph D. Mershon, A. H. Armstrong, Robert Lundell, O. S. Lyford, Jr., H. A. Wagner, Charles F. Scott, B. A. Behrend, W. S. Franklin, Dugald C. Jackson, and V. Karapetoff. Theory of operation of compensated series and repulsion motors treated analytically and graphically. Observed performance characteristics of repulsion motor as motor and as generator. SINGLE-PHASE RAILWAYS W. A. Blanck Vol. xxiii-1904, pp. 83-100 Brief mention of various types of motors that have been proposed for single-phase railways, followed by remarks on line construction for single-phase railways and detailed estimate of comparative cost of construction of 60-mile interurban road to operate respectively with directcurrent and single-phase motor power. No discussion. EFFECT OF SELF-INDUCTION ON RAILWAY MOTOR COMMUTATION E. H. Anderson Vol. xxiii-1904, pp. 379-391 Experimental study of commutation with oscillographic records of pressures between commutator segments under various conditions, and of potential rise in field and armature windings due to interruption and restoration of power at free running speeds. Discussion (including that of paper by W. L. Waters on "Predetermination of Sparking in Direct-Current Machines"), pp. 443-457, by Messrs. W. L. Waters, E. R. Douglas, R. B. Treat, Thorburn Reid, E. H. Anderson, W. S. Franklin, Clarence P. Feldman, and H. Ward Leonard. General remarks on commutation reaction and predetermination of the limitation of commutation. PRESIDENT'S ADDRESS Bion J. Arnold Vol. xxiii-1904, pp. 615-623 Brief sketch of electric railway development since 1893. Present prospects of electric locomotives supplanting steam locomotive. Dividing line between steam and electric trunk line operation. Discussion, pp. 624-644. by Messrs. Charles P. Steinmetz, John Perry, B. G. Lamme, C. V. Drysdale, B. J. Arnold, F. J. Sprague, and Elihu Thomson. The requirements of different classes of railway service-city, suburban and interurban, passenger trunk line, freight trunk line, and mountain service. Speed-torque characteristics of various types of railway motors, single-phase, polyphase and direct-current, and discussion of proper spheres of application of the various motors. Development and application of single-phase compensated series motor. Methods of control. Invention of the repulsion motor. PROBLEMS OF HEAVY ELECTRIC TRACTION O. S. Lyford, Jr. and W. N. Smith Vol. xxiii-1904, pp. 691-722 Review of the considerations which enter into the problem of selecting the electric equipment for the Long Island Railroad. Account of tests made to check accuracy of train resistance formulas. Also tests with steam and electric trains. Discussion, pp. 723-757, by Messrs. L. B. Stillwell, C. O. Mailloux, H. Ward Leonard, W. S. Franklin, A. H. Armstrong, C. T. Hutchinson, W. N. Smith, E. E. Ries, O. S. Lyford, Jr., and William McClellan. General discussion of train resistance formulas, speed-time curves and the other factors which enter into the selection of motor equipment for trunk line operation. Comparison between speed-time and power-time curves for constant current per motor and constant current per car. THREE-PHASE TRACTION F. N. Waterman Vol. xxiv-1905, pp. 465-509 Calculated performance of three-phase system with air gap and frequency of Valtellina line and other conditions the same as assumed by Mr. Berg in paper Vol. XVIII., 1901, page 603. Results compared with Mr. Berg's results for direct-current and three-phase systems with standard direct-current air-gap. Results of performance tests with Valtellina line. Comparison of dimensions and efficiencies of New York Central and Valtellina locomotive. Discussion of the inherent advantage of the three-phase system. Discussion, pp. 510-523, by Messrs. F. N. Waterman, W. N. Smith, Charles P. Steinmetz, C. O. Mailloux, S. M. Kintner, H. G. Stott, and C. L. DeMuralt. Disadvantages and advantages of the three-phase system of electric traction. HEAVY TRACTION PROBLEMS IN ELECTRICAL ENGINEERING Carl L. DeMuralt Vol. xxiv-1905, pp. 525-552 Theoretical study of the comparative merits of three-phase and directcurrent systems for heavy trunk line railroad service under definite assumed conditions, with tabulated results of all calculations. |