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THIS book deals with the making of drawings, from the simplest constructions to complete assembly and working drawings of various classes. It is based upon experience gained in a number of the leading drawing offices and machine shops of this country and Europe and in class work in connection with the instruction of students, machinists and toolmakers interested in mechanical drawing.

It has been the observation of the author that young draftsmen and even many shop men of years of experience often find it difficult to visualize a piece of work yet to be completed in Wood or metal, and in instructing such men in mechanical drawing it has been found desirable to put before them either a casting or forging representing the object to be drawn; or, where this is not feasible, as is ordinarily the case, to use photographic views which show to the eye the appearance of the work as it is to be when finished.

The satisfactory results obtained under this method have led to the gathering of a wide variety of material in the way of photographic views of different classes of machine parts together with actual working drawings of such parts for use in specific chapters in this book.

This general plan of treatment has been discussed with many experienced draftsmen, instructors in mechanical drawing in trade schools, manual training schools and special evening classes, apprentice instructors, shop executives, toolmakers and machinists, and has received their approval and indorsement. It is believed, therefore, that the book will be of real service to all who are interested in the study and teaching of drawing and in the use of drawings in the shop.

Moreover, there are certain chapters which should be of value to experienced draftsmen regularly engaged in the production of working drawings, these chapters dealing specifically with tool drawings and with limit dimensions on drawings used in manufacture.

The laying out. of jigs and fixtures, punches and dies, and other special tools forms a most important part of the work of the modern drawing room and the draftsman wishing to develop in his profession must familiarize himself with approved methods of showing such tools on his drawings in order that they may be readily worked to in the shop and tool room.

Systems of limits and tolerances for dimensions have already been adopted or are being adopted in the plants manufacturing parts in quantities, and here again many draftsmen, even of wide experience, must add to their knowledge by a study of methods of limit dimensions adapted to their own particular line of work. The chapters devoted to tool layouts and limit dimensions should be of benefit to many of the older draftsmen as well as to those of limited experience over the drawing board.

During the author's visits to various plants for the purpose of gathering photographic material, drawings and data, fullest co-operation and assistance have been extended by the management and by drawing room and shop executives. In this connection acknowledgment is especially made to the following firms: B. C. Ames Company, Smith Premier Typewriter Company, Southern Pacific Company (Sacramento Shops), Holt Manufacturing Company, Savage Arms Company, Noiseless Typewriter Company, Keuffel & Esser Company, Theodore Alteneder & Sons.


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