. Practical electricity in medicine and surgery. iemens armature longitudinally, and in the MOTORS AND DYNAMOS. 127 Gramme form around the ring, part of the wire being tlius insideand part outside, , external. This will be understood fromthe figure (113), in winch is shown a Gramme armature cutthrough so as to make clear its structure. In order to lead the current from the armature and toreverse its direction at the proper time* the ends of the separateturns of wire are brought to a contrivance on the end of theaxle called the commutator, marked G in Fi\ 114. The com-mutator is made up of
. Practical electricity in medicine and surgery. iemens armature longitudinally, and in the MOTORS AND DYNAMOS. 127 Gramme form around the ring, part of the wire being tlius insideand part outside, , external. This will be understood fromthe figure (113), in winch is shown a Gramme armature cutthrough so as to make clear its structure. In order to lead the current from the armature and toreverse its direction at the proper time* the ends of the separateturns of wire are brought to a contrivance on the end of theaxle called the commutator, marked G in Fi\ 114. The com-mutator is made up of bars of copper like the spokes of awheel,but not touching at any point, each bar or segment, as it iscalled, being insulated from its two adjacent neighbors.* Attwo diametrically opposite points on the commutator, and press-ing against it, are metal strips technically called brushes, B B (Fig. 114), which serve the pur-pose of leading the current to orfrom the armature (according asthe machine is used as a motor ordynamo) as it revolves
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectelectri, bookyear1890
