| Show frictional gearing it la Is staged staled that frictional gearing Is coming into successful use we in great britain for all uvin purposes ur poses from small machine up to the driving of the screws of steamships instead of one wheel driving another by the intersection or mashing of the cogs 11 or teeth oti on their rims the adjacent surfaces sur sut faces or faces of tho the wheels are grooved lengthwise or in tho direction of their molon molion like the tha roin rolls of a rollin rolling mill these grooves arh fire V shap and the friction of the Vs of one ahel e ea against the sides of the Vs of the other wheel is so great that the tho one drives tle the 0 her as in the case of cog the friction of thajo of the iii ili somewhat greater than in the case of et toothed gearing but in fa other respects th frictional wheels mova move most moat smoothly the tle back lash or rattle rauie of et teeth chief especially f when hen worn morn a prevented the chief chiet economy is in firs firt coat the cul cutting of the th teeth of garin gearing involves the application of abstruse abst abat truse nise mathematical principles and the mack macI machines lines iines and nid processes reix readied red are ard numerous and expensive especially in n basea of beveled gearing BI bus the prep littion aaion of fractional gearing is the most f r i aie llie emd ead straight forward forward work of the turn lathe |
