. Electric railway journal . e run under the bunker and loaded forthe Venice generating station. Both the horizontal andthe vertical conveyors are driven by a motor housed in theloft over the bunker in the reloading tipple. A HOME-MADE CROSSING SIGNAL Just before leaving the New York State Railways Harvie, now with the Hagerstown (Aid.) & Freder-ick Railway, designed a simple and inexpensive crossingsignal which has since been constructed and placed in suc-cessful operation on the former system. The principle ofthis crossing is shown in the accompanying wiring dia-gram. The signal is set
. Electric railway journal . e run under the bunker and loaded forthe Venice generating station. Both the horizontal andthe vertical conveyors are driven by a motor housed in theloft over the bunker in the reloading tipple. A HOME-MADE CROSSING SIGNAL Just before leaving the New York State Railways Harvie, now with the Hagerstown (Aid.) & Freder-ick Railway, designed a simple and inexpensive crossingsignal which has since been constructed and placed in suc-cessful operation on the former system. The principle ofthis crossing is shown in the accompanying wiring dia-gram. The signal is set by a mechanically operated trackswitch, placed about 1000 ft. from the crossing, whichgrounds a wire connected with the winding of a relay. Itis disconnected from the trolley by means of a second trackswitch placed beyond the crossing. The track switch consists of a standard wing rail such asis used in making up frogs, a simple contact box and amechanical connection between the two. The wing rail is Holes for Ventilation. Electric fit/. Journal Simple Crossing Signal—Layout of Relay and Lamp Boxand Installation of Same on Pole pivoted at the entering end by means of three spikes andit is held in contact with the rail by means of soft rubberbushings. The wing rail slides on steel plates, one ofwhich is provided with a strap passing through a slot in theweb of the wing rail to hold it down. The contact box contains two copper contact stripsmounted on a wood block at such an angle that the contact-making piece can slide without danger of sticking. Underthe contact strips is a brass connecting plate bent to thecontour of the block. The contact box is supported on twosteel straps which are bolted to the ties. A third strapcarries a guide for the contact bar, one end of which isbolted to the base of the rail, being bent over into a hookform to secure a good hinge joint. The other end of thecontact bar carries a small brass contact piece. The relays, as indicated in a third drawing,
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
