Useful information for cotton manufacturers . inning in electricallydriven mills : (i). This class compares to class one in the mechanicaldrive given above, the electric motors simply being substitutedfor the line shafting, but no other countershafting and counter-belts are done away with. » (2). This class is also similar to that of its correspondingnumber in the mechanical drive given above, the motor simplybeing direct connected in the line shafting itself, thereby doingaway with nothing whatever in the spinning room, but sim-ply getting rid of the head-shafting and heavy pulley in thebelt
Useful information for cotton manufacturers . inning in electricallydriven mills : (i). This class compares to class one in the mechanicaldrive given above, the electric motors simply being substitutedfor the line shafting, but no other countershafting and counter-belts are done away with. » (2). This class is also similar to that of its correspondingnumber in the mechanical drive given above, the motor simplybeing direct connected in the line shafting itself, thereby doingaway with nothing whatever in the spinning room, but sim-ply getting rid of the head-shafting and heavy pulley in thebelt tower of the mechanically driven mill. *See also American Cotton Manufacturer, April 26, 1906. in whichissue I first suggested this new drive. Atlanta, Ga., STUART W. CRAMER, Charlotte, N. C. Mill Engineering, Continued, Cramer Spinning Drive, Continued. (3). This is the only new type of drive that the introduc-tion of electric power has so far brought out. It consists ofmounting an individual motor either directly on a bracket at wf 4 4#§. the end of one spinning frame, and direct coupling it to thecylinder shaft; or of mounting one motor on a joint bracketbetween the head ends of two spinning frames, and couplingit with friction couplings direct to the cylinder shaft of eachone of the frames. The objection to this type of drive isevident in either case. It is impossible to change the speeds ofthe spinning, which is occasionally desirable, for A. C. motorsmay be said to be of the constant speed t3^pe. It is true thatsome of them are of the variable speed t3^pe. but they are notlikely ever to be used in mill work, and are both special andexpensive. Also driving only one or two frames requires avery small size motor, which is not relatively as high in effi-ciency and power factor as the larger sizes. The new drive that I refer to is one that I am laying outfor a number of new mills to be electrically driven, and forwhich I am doing the engineering work. I do not knowwhether th
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectcottonm, bookyear1904
