Drum Armatures and Commutators (Theory and Practice). A complete Treatise on the Theory and Construction of Drum Winding, and of Commutators for Closed-coil Armatures .

In-8° (21,2 x 13,7 cm), pp. (2), X, 294, (2), 15, (1), legatura editoriale, con titoli in oro al piatto anteriore e al dorso. Con 162 figure in bianco e nero nel testo. Al piatto e al contropiatto anteriore, segno di piegatura nell'angolo inferiore esterno, con piatto comunque rigido. Per il resto, ben conservato. Contents: Introductory; Chapter I. The Generation of Current and Potential in Drum Armature Winding; Chapter II. Wire Drum Winding: Siemens; Chapter III. Heavy Winding: Difficulties and Preliminary Considerations; Chapter IV. Heavy Winding: Prevention of Foucault Currents; Chapter V. Heavy Winding: Plate End Connection. Edison; Chapter VI. Heavy Winding: Evolute End Connections. Crompton and Swinburne. Andersen. Hopkinson; Chapter VII. Evolute Wire Winding: Eickemeyer; Chapter VIII. Helical End Winding: Kapp. Chord Winding: Swinburne; Chapter IX. Exterior End Winding: Crompton and Kyle. Parsons. Fritsche. Chapter X. Commutators. - Introductory Remarks; Chapter XI. Commutators. - Insulation; Chapter XII. Commutators. - Methods of Construction; Chapter XIII. Commutators. - Connections with Armature Winding; Chapter XIV. Sparking at Commutators. -Elementary Theory of Electric Sparking; Chapter XV. Sparking at Commutators. - Self-Induction and Elementary Theory Continued; Chapter XVI. Sparking at Commutators. - The Elementary Planes through Commutator and Armature; Chapter XVII. Sparking at Commutators. - Elementary Consideration of the Brush; Chapter XVIII. Sparking at Commutators. - The Short-Circuits and Currents; Chapter XIX. Sparking at Commutators. - The Short-Circuits and Potentials; Chapter XX. Sparking at Commutators. - Effects of Misplacement of Brushes; Chapter XXI. Sparking at Commutators. - Non-Sparking with Carbon Brushes; Chapter XXII. Sparking at Commutators. - Causes Exterior to Machine; Chapter XXIII. Sparking at Commutators. - Armature Reactions. Field Weak; Chapter XXIV. Sparking at Commutators. - Armature Reactions. Magnetic Flow; Chapter XXV. Sparking at Commutators. - Armature Reactions. Field Asymmetrical; Chapter XXVI. Sparking at Commutators. - Armature Defects; Chapter XXVII. The Taper of Commutator Segments. Titolo per esteso: Drum Armatures and Commutators (Theory and Practice). A complete Treatise on the Theory and Construction of Drum Winding, and of Commutators for Closed-coil Armatures, together with a Full Résumé of some of the Principal Points Involved in their Design; and an Exposition of Armature Reactions and Sparking, by F. Marten Weymouth. Enlarged and Revised from a series of Articles in "The Electrician".