Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 149
Pig. 1.3S1.—Sub-base an; - operated by )ever B. v sttt cogxaeraop. ransrng it to naorg the iuxk. After tightening bel:. •__-.-.»-.- considerable different pulley diameter; hence, if re close together, the arc of contact of the bel*. aller pulley would be appreciably reduced, thus diminishing the… … a w C3 U s Si 1,138 HAWKINS ELECTRICITY Ques. How is this done? Ans. Sometimes by an idler pulley, but usually by mountingthe machine on a sub-base provided with slide rails, as in fig.1,381, the belt being tightened by use of a ratchet screw whichmoves the machine along the base.
Electrical engineering
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