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Materials technology for electron tubes
Feb., 1952.]
BOOK REVIEWS
18 5
tional illness and accidents avoided. The book can be equally useful to the laboratory director and laboratory personnel, and will be understandable by the youngest technician. A list of references, a tabulation of abbreviations and symbols, and an adequate index assist the reader of this volume, which in its completeness contains information on five thousand materials. C. T. CHASE MATERIALS TECHNOLOGY FOR ELECTRON TUBES, by Walter H. Kohl. 493 pages, drawings and photographs, 15 X 23 cm. N e w York, Reinhold Publishing Corp., 1951. Price, $10.00. In the last decade the branch of electrical engineering which embraces the design of electron tubes has become a highly complex field in which many engineers have found full-tlme activity. The requirement for this extensive and specialized skill results from two things: the growing economic importance of the electronics industry, and the great variety of types of electron tubes required. A list of industrial applications or of different electron tube types would be lengthy if it included only the salient items. In view of the present importance of electron tubes in industry, the work of the author in bringing together the specialized information necessary for this engineering reference is certainly justified. It should be realized that we are now dealing with electron tubes of many different forms, the 10-ft. long X-ray tube, the peanut-size subminiature, the large-screen television picture tube, the high-power magnetron and others. Therefore, it is necessary to treat the subject of electron tube materials in a rather fundamental way if the treatment is to be applicable to these very different forms of tubes. In considering the requirements of his text the author, Walter H. Kohl, has realized the necessity of assembling data from a number of separate technical fields. In reviewing the book it is convenient to fit most of the material into subject areas which include metallurgy, physics, electrical engineering, special laboratory practices and ceramics. Much information on the use and properties of glass is given. Included in the treatment of this subject are chapters on the physics of glass, its heat treatment, strain analysis, electrical conduction in glass, electrolysis at elevated temperatures and the reaction of glasses to radiant energy. Since this information is of general engineering importance where glass is used, those concerned with the fabrication of scientific instruments and devices other than electron tubes may be interested in the book. Typifying the author's treatment of physics is the discussion of space lattices and crystal systems as well as relationships like Gibb's Phase Rule which is useful in considering the final compositions of glasses and alloys. Under metallurgical considerations each significant metal --tungsten, molybdenum, tantalum, nickel, copper--is discussed in a separate chapter giving the physical properties and showing how they control its use in tubes. Important techniques are discussed in chapters on high-vacuum and the joining of glass and ceramics to metal. There is perhaps no new information in this book, but it is unlikely that any engineer will read the volume without finding himself in unfamiliar territory part of the time. Those directly concerned with the design, fabrication and evaluation of electron tube construction in industry will be the primary users of this book. Likewise, the university student or research worker confronted with the necessity of constructing electron tubes or related apparatus will surely welcome the book's information on the use of glass and electrode components.
C. W. HARGENS FUNDAMENTALSOF RADIO COMMUNICATIONS,by Abraham Sheingold. 431 pages, illustrations, 16 X 24 cm. New York, D. Van Nostrand Company, Inc., 1951. Price, $5.25. On first leafing through the volume, one might derive the impression that this is "just another book on electronic fundamentals." Quite to the contrary! The author has incorporated into this volume a novel treatment of the subject, both from the standpoint of ready comprehension and the preservation of a keen interest in the material being presented. From the opening to the final chapter, the writer pursues a qualatative discussion in presenting the broad aspects of the field of radio communication.
BOOK REVIEWS
18 5
tional illness and accidents avoided. The book can be equally useful to the laboratory director and laboratory personnel, and will be understandable by the youngest technician. A list of references, a tabulation of abbreviations and symbols, and an adequate index assist the reader of this volume, which in its completeness contains information on five thousand materials. C. T. CHASE MATERIALS TECHNOLOGY FOR ELECTRON TUBES, by Walter H. Kohl. 493 pages, drawings and photographs, 15 X 23 cm. N e w York, Reinhold Publishing Corp., 1951. Price, $10.00. In the last decade the branch of electrical engineering which embraces the design of electron tubes has become a highly complex field in which many engineers have found full-tlme activity. The requirement for this extensive and specialized skill results from two things: the growing economic importance of the electronics industry, and the great variety of types of electron tubes required. A list of industrial applications or of different electron tube types would be lengthy if it included only the salient items. In view of the present importance of electron tubes in industry, the work of the author in bringing together the specialized information necessary for this engineering reference is certainly justified. It should be realized that we are now dealing with electron tubes of many different forms, the 10-ft. long X-ray tube, the peanut-size subminiature, the large-screen television picture tube, the high-power magnetron and others. Therefore, it is necessary to treat the subject of electron tube materials in a rather fundamental way if the treatment is to be applicable to these very different forms of tubes. In considering the requirements of his text the author, Walter H. Kohl, has realized the necessity of assembling data from a number of separate technical fields. In reviewing the book it is convenient to fit most of the material into subject areas which include metallurgy, physics, electrical engineering, special laboratory practices and ceramics. Much information on the use and properties of glass is given. Included in the treatment of this subject are chapters on the physics of glass, its heat treatment, strain analysis, electrical conduction in glass, electrolysis at elevated temperatures and the reaction of glasses to radiant energy. Since this information is of general engineering importance where glass is used, those concerned with the fabrication of scientific instruments and devices other than electron tubes may be interested in the book. Typifying the author's treatment of physics is the discussion of space lattices and crystal systems as well as relationships like Gibb's Phase Rule which is useful in considering the final compositions of glasses and alloys. Under metallurgical considerations each significant metal --tungsten, molybdenum, tantalum, nickel, copper--is discussed in a separate chapter giving the physical properties and showing how they control its use in tubes. Important techniques are discussed in chapters on high-vacuum and the joining of glass and ceramics to metal. There is perhaps no new information in this book, but it is unlikely that any engineer will read the volume without finding himself in unfamiliar territory part of the time. Those directly concerned with the design, fabrication and evaluation of electron tube construction in industry will be the primary users of this book. Likewise, the university student or research worker confronted with the necessity of constructing electron tubes or related apparatus will surely welcome the book's information on the use of glass and electrode components.
C. W. HARGENS FUNDAMENTALSOF RADIO COMMUNICATIONS,by Abraham Sheingold. 431 pages, illustrations, 16 X 24 cm. New York, D. Van Nostrand Company, Inc., 1951. Price, $5.25. On first leafing through the volume, one might derive the impression that this is "just another book on electronic fundamentals." Quite to the contrary! The author has incorporated into this volume a novel treatment of the subject, both from the standpoint of ready comprehension and the preservation of a keen interest in the material being presented. From the opening to the final chapter, the writer pursues a qualatative discussion in presenting the broad aspects of the field of radio communication.