Machine drawing; a text and problem book for technical students and draftsmen (1921)
Svensen, Carl L. (Carl Lars), 1884- · New York, D. Van Nostrand company · leaf 125
Fig. 200. Friction Wheels. will turn, but in an opposite direction. If the pulley A has a diameterof d and the pulley B a diameter of 9, it will be necessary for pulley Ato make three revolutions while pulley B makes one revolution. Thevelocity ratio is 3. Driven … 12 Teeth36 Teeth Fig. 201. Pinion and Gear. If the forces are large or it is necessary to prevent slipping, gear teethmay be added to the two wheels as in Fig. 201. The ratio of velocities 114 GEARS AND CAMS 115 or the number of turns for gears is figured by using the number of teethon each wheel.…
Machinery
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