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Brown - figure 044

A kind of gearing used to transmit great force and give a continuous bearing to the teeth. Each, wheel is composed of two, three, or more distinct spur-gears. The teeth, instead of being in line, are arrangedin steps to give a continuous bearing. This system is sometimes used for driving screw propellers, and sometimes, with a rack of similar character, to drive the beds of large iron-planing mach…