. Electric railway journal . Type III. Type 1.—Atight cylinder. Type IIrelative positions Type II TyPe IV FIG. 9—TYPES OF MODERN STREET BOX MECHANISMS FOR ELECTRIC SWITCHESmechanism connected to switch tongue ; B, water- Type III.—Cast-iron box containing switch-throwing mechanism. -Switch and switching mechanism in Type IV.—Street box, mercury seated, with motor and gears. devices for locking switches against two-car trainoperation. Present-day devices consist principally of four mainparts, namely, the contactor, the circuit-changer, thefuse box and the main street box. Sometimes the con-tact
. Electric railway journal . Type III. Type 1.—Atight cylinder. Type IIrelative positions Type II TyPe IV FIG. 9—TYPES OF MODERN STREET BOX MECHANISMS FOR ELECTRIC SWITCHESmechanism connected to switch tongue ; B, water- Type III.—Cast-iron box containing switch-throwing mechanism. -Switch and switching mechanism in Type IV.—Street box, mercury seated, with motor and gears. devices for locking switches against two-car trainoperation. Present-day devices consist principally of four mainparts, namely, the contactor, the circuit-changer, thefuse box and the main street box. Sometimes the con-tact device has the circuit-changing device attachedthereto, and in some cases the circuit changer is mountedupon the trolley pole at the curb. Several types ofcontactors, fuse boxes and circuit changers are shownin Fig. 8, while a diagram of wiring of a complete in-stallation is shown in Fig. 7. Views of several street-box mechanisms are shown in Fig. 9. In general the operation of the switch tongue is ac-complished by means of s
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
