American School of Correspondence · Chicago, American school of correspondence · leaf 363
with the changing of thecam sleeve, the clutch is disengaged and the revolutions of the carriageshaft cease. H^ is made in two pieces with corrugated faces whichare kept in contact by a heavy steel spring, W^, Should anythingobstruct the outward movement of the carriage, this spring will giveand… … Fig. 233. Elevation Showing Front Roll Clutch. tight pulley, but with the half revolution of the cam sleeve, the beltguide is locked into position over the loose pulley. We have already seen that just before the carriage arrives atthe end of the outward run, the belt is moved on to the loose…
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