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 52
VD> o y <s s … -r-^ v* 48 THE MACHINIST AND TOOIi MAKERS INSTRUCTOR, Figure 40 is similar to Figure 37, except that in the latterthe two levers form au acute angle, while in the former(Figure 40) they form an obtuse angle. Suppose these twolevers are to be keyed on the shaft F and at an angle of 120degrees, as…
Machinery
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