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.

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.