Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 475
FIG. 333.—DETAIL OF KELLOGG PARTY-LINE BELL. pole pieces, s, s, of soft iron are adjustably secured to the frontends of the cores of the magnets in such a manner as to allow thearmature, a, to freely vibrate between them. The vibrating part of the mechanism, including an armature, aball-striker and… … FIG. 334.-DETAILS OF ARMATURES AND STRIKERS, KELLOGGPARTY-LINE BELL. pieces. In the left-hand portion of this figure four such armatureunits, having different sizes of ball strikers, are shown. The armature proper is made of two pieces of soft iron, b b, riv-eted together and carrying between them…
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