Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 59
e air is thus o-reatlv THE TELEPHONE RECEIVER. 37 shortened, and the field of force is concentrated at the point whereit will be most effective. It is important to have faulty construction pointed out, and thebipolar receiver shown in Fig. 24, which unfortunately came intowide use, may be cited… … 1 1 1 FIG. 24,—OLD TYPE BIPULAK RECEIVER. The magnet consisted of two pairs of separately magnetized steelbars, F F, the bars in each pair being laid with like poles together,thus forming two compound bar-magnets. These were so laid to-gether that the north pole of one pair was opposite the south…
Telephone
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