OCR Text |
Show Steel In Plaeo of Leather. Steel bands or belts, as a substitute for ordinary leather or rope drives, havo been introduced by a factory of Charlottenburg. Germany. Such belts may be reduced to about one-alxth ot tho size required for leather belts, they do not stretch, pulleys may bo narrower, and In some cases shafts may be smaller. Either ordinary pulleys pul-leys or palieys with a special covor. ing to Increaao friction may be used. A belt four inches wide and. one-fifth of an Inch thick transmitted 200 to 250 horsepower at a belt speed of 5,400 feot per minute, and tests havo shown that steel belts Wy ran 12.-000 12.-000 feet per rotaato. |