Rogers' drawing and design; an educational treatise relating to linear drawing; machine design; working drawings; transmission methods; steam, electrical and metal working machines and parts; lathes; boiler and parts; instruments and their use; tables, etc (1913)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 258
den-dum circles, Fig. 427. Take any point O, as the pitch point onthe pitch circle and draw a radial line HH throughthis point. Draw a line EE making an angle of75° with the radial line HH. The base circle isfound by drawing inside of the given wheel, a circletangent to the inclined line, EE (which… … Fig. 426. addendum circle. The part of the flank betweenthe base circle and the dedendum circle is straightand is part of the radius of the circle. No wheel having less than 12 teeth will gear cor-rectly together when the base circle is laid out in 384: ROGERS DRAWING AND DESIGN.
Mechanical drawing · Machine design
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