. The street railway review . rotected, and in this case it would assist matters tohave two additional contact points under each of the mag-net armatures, to these contact points a series of lampscould be connected so that when the armature of the electro-magnet of any one circuit should drop and close the batterycircuit, making the gong ring, it would also close a lampcircuit that would indicate which feeder wire was being tam-pered with. John H. De Gruchy, of the Union Railroad Company,Providence, R. I., writes: In considering the protection of suburban lines againsttheft the cost of the ina
. The street railway review . rotected, and in this case it would assist matters tohave two additional contact points under each of the mag-net armatures, to these contact points a series of lampscould be connected so that when the armature of the electro-magnet of any one circuit should drop and close the batterycircuit, making the gong ring, it would also close a lampcircuit that would indicate which feeder wire was being tam-pered with. John H. De Gruchy, of the Union Railroad Company,Providence, R. I., writes: In considering the protection of suburban lines againsttheft the cost of the inauguration and maintenance of anymethod must be taken into account. It is certain that theannual cost of a-patrol would amount to more than a yearsincidental stealings, the tying up of the line and the expenseof repairs resulting therefrom, inclusive. The accompanying sketch, Fig. 2, will show at a glance •-OOOOOve Tro/Ietf Wire I •5enes ofLampaotEnc/ of Tro//€i^ L/neBreaher Connections for OtherSecf/on. £lec troMaqne t. \fuse &.och 00000-1 5er/e3 of Lamps That Burni/Uhen Tro//ei^ C/rcuit /3 Open ree^^er Panel DO 292 (|)tfl£fiX%ilH44%^%W the difficulties to be overcome in order to establish an an-nunciator or bell system which would operate in the eventof any part of the line being cut. With trollev taps everyi,ooo ft. and the rails connected to negative feeders every500 ft. an efficient annunciator or bell system would be hope- c>y TrrlleifWirg- ■ Trdleif Topi Ever,^ lODOFt Rails Connected fc CableEvert^ 500 ft. Length ofL:ne 7/^,iesFiol joo^oo en 500,000 cm.
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
