Abstract :
H. B. Dwigtht: Usually it is found undesirable to place copper straps across lines of magnetic flux, but they should be placed parallel to the magnetic field as much as possible. Accordingly, where the phases are separated, I should suggest placing the straps parallel to the sides of an equilateral triangle, as in Fig. 1 of this discussion. If arrangement has not been tried out, it should be tested in comparison with the arrangements shown in Fig. 6 of the paper.