. Electrical world. FIG. 2.—ENCLOSED TYPE FLOOR P.\TTERN. slow and moderate speed, and expects before long to have ready anentire line from J4 to 75 hp inclusive. The machines are made in the open, semi-enclosed and entirelyenclosed types. The open-type, floor-pattern machine is illustratedin Fig. I; the enclosed-type, floor-pattern machine in Fig. 2. Boththese illustrations give a good idea of the symmetrical and pleasing March 5, igo^. ELECTRICAL WORLD and ENGINEER. 489 appearance of the machine. The machines are furnished in the floor,ceihng or wall (see Fig. 3) horizontal patterns and in t
. Electrical world. FIG. 2.—ENCLOSED TYPE FLOOR P.\TTERN. slow and moderate speed, and expects before long to have ready anentire line from J4 to 75 hp inclusive. The machines are made in the open, semi-enclosed and entirelyenclosed types. The open-type, floor-pattern machine is illustratedin Fig. I; the enclosed-type, floor-pattern machine in Fig. 2. Boththese illustrations give a good idea of the symmetrical and pleasing March 5, igo^. ELECTRICAL WORLD and ENGINEER. 489 appearance of the machine. The machines are furnished in the floor,ceihng or wall (see Fig. 3) horizontal patterns and in the verticalpattern. The motors are well adapted for mounting upon machinetools or machines of almost any description, for direct connection orchain drive. The machines are all of the four-pole type. The mag-net frames are of soft homogeneous cast-steel, as are the bracketsor feet, and the pole-pieces, which are cast as part of the magnetframe. The pole-tips or shoes are of the same material, and secured. FIG. 3.—VERTICAL r.\TTERN. to the pole-pieces by means of external bolts. The bearing-bracketsare of cast-iron and carry self-oiling and self-aligning bearings ofgenerous dimensions. A frame-ring is cast as part of each of thebrackets, and this ring carries lugs between which the cast-ironbrush-ring is supported. The brush-holders are of the well-knownC & C reaction type and are secured to brass pins carried by theinsulated brush-rings. This form of support of the brush riggingassures absolute stability and non-vibration of the brushes. Thefield coils are wound on metal bobbins of novel construction and are over 30° C. by thermometer. It also makes other unusual guaran-tees. This unusually low temperature increase is accounted for bythe novel construction of the armature. The armature lamina: spac-ers, back-plate and end-plate, as well as the commutator itself, areso designed that their several parts radiating from the shaft act asthe vanes of a fan, and when the armature
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
