. American engineer and railroad journal . may be noticed from Fig. 34 that there is absolutely nopossibility of any interference, or of double-meshing combina-tions, in shifting the rocker frame. R. From the way that themovable and fixed cones are arranged in the gear box it is im-possible to bring more than one pair of gears into mesh at thesame time, so that no guiding arrangement is necessary forthe locking handle, H; this is an important feature of thismechanism, in providing against stripping gear teeth. In addition to the eight speeds thus made available, anothereight speeds are provide
. American engineer and railroad journal . may be noticed from Fig. 34 that there is absolutely nopossibility of any interference, or of double-meshing combina-tions, in shifting the rocker frame. R. From the way that themovable and fixed cones are arranged in the gear box it is im-possible to bring more than one pair of gears into mesh at thesame time, so that no guiding arrangement is necessary forthe locking handle, H; this is an important feature of thismechanism, in providing against stripping gear teeth. In addition to the eight speeds thus made available, anothereight speeds are provided for by the shifting gear arrange-ment on shaft. S. By throwing the clutch handle shown on theupper side of the box the pair of gears, A-B, which are mountedrigidly upon a sleeve sliding freely upon shaft, S, may bethrown over to one side or the other, so that either one maydrive cone, Q, through corresponding gears, and thus at eithera fast or a slow speed. Elach handle on the gear box is en- ^62 AMERICAN ENGINEER AND RAILROAD July, 1903. AMERICAN ENGINEER AND RAILROAD JOURNAL. 263 tlrely Independent of the other—they may be operated separ-ately or in unison. The feeds are arranged in geometrical progression, rangingfrom .006-in. to .225-in. per revolution of the spindle. An en-graved plate (reproduced in Fig. 33) is attached to the feedbox which indicates the feeds obtained for each position ofthe handles. When the upper lever Is thrown to the right, allthe finer feeds are obtained, ranging from .OOC-in. to .03C-in.,which is the range generally used with the direct cone drivewithout the back gears; when the upper lever is thrown to the
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
