. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . ose of obtaining the shortest distancebetween the journals, bringing them as near to the wheel as the discharge space will wheels may be used lor various purposes, particularly where a large amount of poweris transmitted from a main horizontal line of shafting, and from the pulleys of which directconnection can be made to one or more pulleys on the horizontal water-wheel shaft. Manyapplications of double
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . ose of obtaining the shortest distancebetween the journals, bringing them as near to the wheel as the discharge space will wheels may be used lor various purposes, particularly where a large amount of poweris transmitted from a main horizontal line of shafting, and from the pulleys of which directconnection can be made to one or more pulleys on the horizontal water-wheel shaft. Manyapplications of double-discharge wheels have been made to electric lighting, electric power,and other uses, directly from pulleys on the water-wheel shaft to the pulleys on the dynamo,the saw arbor, or the pumping machinery. WATER WHEELS. 899 A novel form of the Leffel wheel is known as the twin combination. This consists of tworegularly built James Leffel wheels, either standard or special, placed within a large cylin-drTcal wrought-iron casing, with cast-iron heads, the whole affair being substantially anddurably buift. Both wheels discharge the water toward each other, which unites and passes. Fig. 12.—Leffel wheel. downward through a single central draft tube of large capacity. The changes in generaldesign of the standard Leffel wheel which have been made of late years, consist in widergates and correspondingly wider buckets. This arrangement secures a greatly enlargedcapacity for water, and consequently a largely increased power for the same size of wheel ;affording a concentration of power in a smaller space.
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
