Hobart, H. M. (Henry Metcalf), 1868-1946 ed · Philadelphia, J. B. Lippincott · leaf 303
men is about 1-35.Bitumen; VulcanisedBitumen under Cable,Underground. Triphase. SeeThree-phase. Triple ConcentricCable. See Cable,Triple Concentric. Triply Re-entrantArmature Winding.See Ee-entrancy. Trolley, originally asmall wheeled carriagerunning upon an over-head conductor, andtowed along by… … Fig. 2.—Bow-type Trolley consists of a small wheelcarried at the end of along steel pole, and pressedupwards against the trolley-wire by means of springs.The wheel is grooved toprevent it from leavingthe wire under the condi-tions of normal running.The Bow-type Trolley (see fig. 2) con-sists of a…
Electrical engineering
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