Transactions . if -0 General Arrangement of the Magnetic Circuit. the arms of the U-shaped frame were nearly as large in cr<section as the frame. The extremities of the arms were en-larged to receive the cylindrical circuit, the object being tomaintain the same size of circuit throughout its entire length,and so not materially reduce the flux. Twelve inches of thecylindrical circuits of each arm were cut down to receive thesiting coils, thus forming the cores of the circuit. The coilswere wedged fast to the cores, thus maintaining their relativeposition to the magnet, regardless of its posi
Transactions . if -0 General Arrangement of the Magnetic Circuit. the arms of the U-shaped frame were nearly as large in cr<section as the frame. The extremities of the arms were en-larged to receive the cylindrical circuit, the object being tomaintain the same size of circuit throughout its entire length,and so not materially reduce the flux. Twelve inches of thecylindrical circuits of each arm were cut down to receive thesiting coils, thus forming the cores of the circuit. The coilswere wedged fast to the cores, thus maintaining their relativeposition to the magnet, regardless of its position. The coilsthus faced one another, enclosing the same axis, and, with thecores, could he brought together as the pole-pieces, giving amaximum concentration and a minimum xxxi.—25 Apparatus Employed in the Traction-Method. INVESTIGATIONS 01 MAGNBTK Ml LD8. 109 In the design of the magnet proper, the rules f the latdynamo-construction were followed, except that the length of the circuit, which w;i> necessitated l»\ the required adjustment,is a radical departure from the latest design. The nature ofthe work required an adjustment of from «»..> to 1(> in. a. Tin Coils.—A> show n in Fig. 2, six coils were arranged intwo groups—three on either pole. The coils were connectedin multiple—primarily, to give maximum flux; secondarily, tofacilitate the control f excitation by introducing r throwingout mils, as found desirable. The coils were of high resistance,allowing a current o\ only -\.~> amperes to pass on a L18-voHcircuit. They were, however, wound to resist high tempera-tures, and would run continuously for Beveral hours withoutoverheating. Bach coil was wound with 6500 turns of* No. 24B. A; 8. wire, giving, for the six coils
Size: 1197px × 2087px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
