The machinist and tool maker's instructor, containing an easy method of calculating and laying out difficult work in the machine shop .. (1896)
Genung, Edward. [from old catalog] · New York [Press of J. B. Savage, Cleveland] · leaf 68
line F G (any-where to suit) make the arcs H H, I I, and, where these linescross each other draw a line, then this line will be at rightangles to the line D E, as shown. Figure 50 represents a plate that is to have a number ofholes bored through it, and two of these holes should be ex-actly six… … <£»ye--ty <=>--t- _.x_. /1 / ! 4 x I % CO 64 THE MACHINIST AND TOOL MAKERS INSTRUCTOR. We have only to draw the line A B, and we have a rightangled triangle CBD, the radins of which is six inches, andC D is the sine of the angle; dividing 3J4 by 6 we have thedecimal .5416 which equals the…
Machinery
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
