Planing and Milling: A Treatise on the Use of Planers, Shapers, Slotters, and Various Types of Horizontal and Vertical Milling Machines and Their Attachments. E-book. Formato PDF Franklin D. Jones   -  Forgotten Books, 2017  - 

This book deals with the practical problems connected with the adjustment and use of planets, shapers, slotters and milling machines of standard and special designs. Each subject is treated from the standpoint of the man in the shop, and a special efiort has been made to present needed information per taining to problems which the practical man often finds dificult to solve. Many operations from actual practice are illustrated and described to show the adaptability of different machines for certain classes of work, and the relation between various designs and types. Examples and operations have been selected that would not only show how a specific result is obtained, but illustrate fundamental principles and serve as a general guide. Descriptions of methods involving mathematical calculations contain the necessary rules or formulas and are accompanied by examples illustrating the problems which arise in actual practice.

Valves and Valve Gears: Volume I Steam Engines and Steam Turbines; Volume II Gasoline, Gas and Oil Engines. E-book. Formato PDF Franklin Deronde Furman   -  Forgotten Books, 2017  - 

Much Of the material in this work has been arranged after ex tended visits to drafting rooms in which the work in valve gears was being carried on in a practical way, and it is believed that the methods here presented will be found to agree fairly well with general practice. In writing up the descriptions Of the practical forms of valves and valve gears the author has received numerous courtesies from manufacturers which are hereby acknowledged. It has been the rule to have the manufacturer Of the valve or gear or engine described to pass finally on the accuracy Of the description and Of the illustrations that appear in this work. Every illustration has been newly prepared for this edition. In order to avoid the use of subscripts in numbering the illustrations and paragraphs as the work Of preparation proceeded, and as changes and additions were made, the author laid out the work originally by leaving ten numbers free at the end Of each section. It will be found that these numbers have been all used at the end Of some of the sections and that none have been used at the end Of other sections. The page numbers, however, are in consecutive order throughout the book.

Gaging Tools and Methods: Measuring Instruments Used by Machinists and Toolmakers. E-book. Formato PDF Franklin Day Jones   -  Forgotten Books, 2017  - 

The standard bar thus marked was taken to Washington and com pared with the government standard Bronze No. 11 and also with Low Moor iron No. 57. In comparing these standards, a method was employed very similar to that used in marking. The bar, properly supported, Was placed upon a box that rested upon rolls and onthis same box was placed the government standard with which the Brown Sharpe standard was to be compared. Both the government standard and the bar to be tested were placed in position under the microscope and by the micrometer screw of the microscope the variation between the two was measured. Three comparisons or tests were made on each end before determining the reading of the microscope, and after these comparisons the value of the B. S. Standard No. 2 was found to be inches for the yard, and meter for the meter. After completing this work, a second standard known as No. 3 was prepared, and comparison with the government standard showed the error to be inch for the yard, and 0000005 meter for the meter. After establishing a yard in this manner, the next problem was that of obtaining an inch; this was done by subdividing the yard into two equal parts, and then further subdividing these two divisions into three, and the three into six, thus giving thirty-six subdivisions or inches.