The Diseases Of Electrical Machinery

INTRODUCTION, This little opusculum owes its existence to a wish expressed in several quarters that the author would put together in more complete form, as a book, some earlier scattered publications of his on the present topic. I should not have yielded forthwith to this demand had it not been actually for the absence of any such book in this subject. Neither in the ex- cellent Pocket-books or Calendars such as those * of Pohl, Uppenborn, and Von Gaisberg, which have been before the public for a long series of years, nor yet in the more bulky technical treatises does one find an account of the faults and break-downs of electric machines in a convenient form for the use of engineers and fitters. Such a compilation ought, on the one hand, to be short, and to avoid theoretical expositions wherever these are not absolutely necessary; on the other hånd, it ought to afford to the practical man * The Author here particularly refers to the pocket-book for electrical engineers and fitters by Chief-Engineer H. Polil, entitled “The Erection of Electric Light and Power Stations,” published in Hannover by the Messrs. Jänecke Brothers. A similar remark is more or less applicable to the various pocket-books for electrical engineers in the English language. Nevertheless, there exist in English several works which deal with the subject of Diseases of Dynamos, as may be seen in the final chapter of the Editor’s book on Dynamo-Electric Machinery (Seventh Edition, 1904). There are also the works of Messrs. Crocker and Wheeler, and that of Mr. Lummis Paterson.