. The street railway review . he car is also provided with an electricluaiir fur dryin); tin- saml when il lieconies necessary. ThewrldiT is next hrcjiij^hl into position and the terminals 1 Illic niu\al)k jaws i)ron;;hl in jjositioii (jii each side of therail. The welder pid])er consists of the transfornier abovedescribed, and two cursed pivoted jaws, wliich are actu-ated l)v an horizontal iivdranlie cylinder which c(jniieclsllic iippci- lerininals ol the jaws and to which power is li\ a small pinnp operateil liy hand power, as^hown. riu ; head is suspended to an adju
. The street railway review . he car is also provided with an electricluaiir fur dryin); tin- saml when il lieconies necessary. ThewrldiT is next hrcjiij^hl into position and the terminals 1 Illic niu\al)k jaws i)ron;;hl in jjositioii (jii each side of therail. The welder pid])er consists of the transfornier abovedescribed, and two cursed pivoted jaws, wliich are actu-ated l)v an horizontal iivdranlie cylinder which c(jniieclsllic iippci- lerininals ol the jaws and to which power is li\ a small pinnp operateil liy hand power, as^hown. riu ; head is suspended to an adjustal)lijih .ami li\ means of |)ower may he raised, lowered andluined from one side to the other, so as to operate on citherrail. The splice bars that are employed are about i x 3 in.;ind from 17 to 2^^ in. in leiiijth. These are first i)rei)aredby haxint; a ))ear shaped jirojection of 5^ in. puncheil upat each end and ;; similar sliaped piece fitted into tln cavityon the other side of the bar. The prnjectii>ns form the in-. FIG. 0-OLn CAR. itial points of contact when placed in position aijainst the-web of the rail. For the middle contact a thin stri]) ofmetal is placed between the bar and rail and the middleweld is made first. 1 he bars l)ein_t; in place the terminalsof the transforniers are liekl against the base with a pressureof about lb., and as soon as the curient is well startedand heat generated the is slacked off until a weld-ing heat is obtained, when pressure is mcreased to about,55 tons and held until the metal has cooled or become secret of success in electric welding has been foundby experiment tc consist in working the hot metal by pres-sure as is accomplished in ordinary welding by the black-smiths hammer. The welds are made at three points onthe bar, first at the middle and through the web, then atthe ends of the bar. In case there is a gap between theends of the rails it is filled bv means of shims consistingof thin rail sections,
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
