. Electric railway review . ear. This lug carries a brass or bronze ring thoroughlyinsulated from the hanger proper. A wire having a brassnut on one end and a tube of insulating nutterial on il wheieit passes through the brass ring is securely soldered to thetrolley wire at a point T. The brass rings. (!. are connected electrically by a smallwire to automatic switches or circuit-breakers i)laced at inter-vals of three or four blocks apart, and which when opendisconnect the trolley wire in that section from the feeders. The method of operation will now readily be understoodby examining the righ
. Electric railway review . ear. This lug carries a brass or bronze ring thoroughlyinsulated from the hanger proper. A wire having a brassnut on one end and a tube of insulating nutterial on il wheieit passes through the brass ring is securely soldered to thetrolley wire at a point T. The brass rings. (!. are connected electrically by a smallwire to automatic switches or circuit-breakers i)laced at inter-vals of three or four blocks apart, and which when opendisconnect the trolley wire in that section from the feeders. The method of operation will now readily be understoodby examining the right-hand side of the illustration. Shouldthe trolley wire bi-eak as shown, il will sag and pull thewire, F. until llie brass head or nut, H, comes in contact withthe brass ring. (i. sending the trolley current through asmall auxiliary wire to the circuit-breaker, energizing thesolenoid of the breaker and thus shut otT the current beforethe wire has had time to reach the ground. It is not sug- THERMIT STEEL FOR REPAIR The success which the thermit iirocess has met withduring the last few years, together with the many improve-ments which have developed concerning its use. has createda demand on the part of shop foremen and engineers formore specific directions covering its various satisfy this demand the (ioldschmidt Thermit Company, 90West street. New York, has recently issued an interestingpamphlet describing the general applicability of this processto railway leiiair work. It is thought that a careful studyof this |)amph!et will enable anyone to make the ordinaryrepairs Ijy the thermit process. Thermit is a mixture of finely divided aluminum and ironoxide. When ignited in one sjiot, the combustion so startedcontinues throughout the entire mass, without suiiply of heator power from outside, and ))roduces superheated liquid steeland superheated liquid slag (aluminum oxidei. Thermit Steel for Welding. Owing to the superheated condition of thermit steel itp
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectstreetr, bookyear1906
