Hobart, H. M. (Henry Metcalf), 1868-1946 ed · Philadelphia, J. B. Lippincott · leaf 201
olid in the tube.Splicing sleeves are sometimes used on over-head trolley lines, but are not desirable insuch positions, as the trolley wheel does not,as a rule, run smoothly over them. Splicingears should be employed instead, whereverpossible, or, better still, the breaks in thetrolley wire should… … Sleeve lor Armature Core of providing means for the entrance of theventilating air. Two methods are usuallyadopted: the first being to provide holes inthe core plates near the centre and thenassemble them straight upon the shaft, andthe second is to assemble them on a spiderwhich provides an…
Electrical engineering
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