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 143
the angle 21° 48 to correspond withthe decimal .400. 21° 48 is then the center angle of the pinionon the pitch line as shown, and the difference between thisand 90° or 68° 12 is also the center angle of the large gear,also shown. It must be remembered that the lines B O and I O are thepitch lines… … P l r .^, .-- ^ h / ^1 ~*~\ * ,-** 0 o et im*~j^ ^ t MOf/V/d v^ \ • Mi- * - n HI33J. ZlH^ft £ \ \ Hfc * 1 : ! \§§§§>.,^ / iSR^ °° ; \ \? t 55 IV * 1 *-$\ \ xj£^>^ \ \ vV \ \ * ^f \ v\cf)»\ V0D| >* f* ta Y\\ « « 5: \ \ ^. ° ^ a ^ *-*.« Ui \ \ \\ O J? \ir^5 a0 i c> \ \ w\ \ \^ CO \\V^ \V\…
Machinery
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