. The Street railway journal . plates was too limited to permit of installing concealedbonds of the required capacity, and the plan of attaching the bonds to the base of the rail had to be aban-doned, as the connection between the bondand cinder ballast would interfere with theproper working of the signal system for whichthe tracks form a circuit. The matter finallyresolved itself into a question of using eitherlong bonds to span the joint-plates or shortbonds from the rail to the joint-plate, andvice versa, using the joint-plates as a part ofthe return circuit. The latter plan wasadopted beca
. The Street railway journal . plates was too limited to permit of installing concealedbonds of the required capacity, and the plan of attaching the bonds to the base of the rail had to be aban-doned, as the connection between the bondand cinder ballast would interfere with theproper working of the signal system for whichthe tracks form a circuit. The matter finallyresolved itself into a question of using eitherlong bonds to span the joint-plates or shortbonds from the rail to the joint-plate, andvice versa, using the joint-plates as a part ofthe return circuit. The latter plan wasadopted because the initial cost and the liabil-ity of the bonds being stolen was very muchless, while the actual results obtained are inevery way more satisfactory than could behad in the use of long bonds, excepting, pos-sibly, the matter of maximum conductivity,which is limited to the capacity of the joint-plates. These were, however, in every casenearly equal to the cross section of the rail,so that this disadvantage, if it may be srs. ELECTRIC TRAVELING HOIST HANDLING CAR-BODY IN SHOP OF THEDULUTH STREET RAILWAY COMPANY FIG. -SOLDERED TERMINAL TYPE RAIL-BOND travel of the hoist. The steel runway which supports the trav-eling hoist consists of four Z-bar columns supporting the doubleI-beam runway girders, between which the lifting hooks arehung. The stresses on the structural beams are thus well bal-anced and insure proper rigidity in handling the load. In operation, this crane is used principally to lift car bodiesfrom one set of trucks to another, and the hoist covers twolines of tracks. Steel clamps are attached to the car bodies, towhich the crane hooks are fixed, and as all the blocks travel at termed, was very slight. The bond adopted for this work is ofthe Thomas soldered terminal type, made by the Lord ElectricCompany, of Boston, Mass., consisting of laminated strips ofsoft, annealed copper, each strip being tinned separately for adistance suitable to make the terminals, after
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
