. Operation of trains and station work and telegraphy . echan-ism, as well as the armature, may be removed withoutdisturbing any of the other parts. Armature.—The armature is of the four-pole drumtype, having a two-circuit singly re-entrant drum wind-ing of the straight-out, or barrel type. The coils arewound on formers and afterward placed on the core, thusproviding a perfectly balanced winding, both electricallyand mechanically. The arm^ature coils are assembled on the armature inthe usual manner and specially banded. With this con- 184 RULES FOR MOVEMENT OF TRAINS struction, it is possible
. Operation of trains and station work and telegraphy . echan-ism, as well as the armature, may be removed withoutdisturbing any of the other parts. Armature.—The armature is of the four-pole drumtype, having a two-circuit singly re-entrant drum wind-ing of the straight-out, or barrel type. The coils arewound on formers and afterward placed on the core, thusproviding a perfectly balanced winding, both electricallyand mechanically. The arm^ature coils are assembled on the armature inthe usual manner and specially banded. With this con- 184 RULES FOR MOVEMENT OF TRAINS struction, it is possible to remove a single damaged coilby simply lifting out one-quarter of the coils^ when thedamaged coil can be replaced by a new one. While thisfeature is extremely valuable in facilitating repairs, andhas been adopted for this reason, we have no record ofthe burn-out of a generator armature. Spider and Removable Shaft.—The core of the ar-mature consists of the usual annular stampings, slottedto receive the coils, and mounted on a ventilated spider. /. ,f(S*:w%,
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1919
