. Electric railway journal . he running board in the usualmanner. The base is of cast iron, having the center hole fittedwith a hardened steel bushing in which arc thirty-eight % steel rolls to give it a very sensitive lateral motion. Thisfeature gives easy adjustment between the pole and the wire,no matter what outline the wire may take, and also takesoff all lateral pressure from the wheel and wire on curves. Two 4!4-in. diameter cylinders extending forward are fittedwith cylinder heads having long stems to support the pistonrods on which a cross-head is fitted. This cross-head is co
. Electric railway journal . he running board in the usualmanner. The base is of cast iron, having the center hole fittedwith a hardened steel bushing in which arc thirty-eight % steel rolls to give it a very sensitive lateral motion. Thisfeature gives easy adjustment between the pole and the wire,no matter what outline the wire may take, and also takesoff all lateral pressure from the wheel and wire on curves. Two 4!4-in. diameter cylinders extending forward are fittedwith cylinder heads having long stems to support the pistonrods on which a cross-head is fitted. This cross-head is con-nected to the toe of the yoke by the two side rods that havefree movement in the cross-head, allowing the piston to remainstationary as the pole moves up or down to adjust itself tovarying heights of the wire. From the base there extend rear-ward two standards which are threaded and fitted with nuts,and against these a cross-head rests for tensioning the springs. The toe is arranged so that several connections can be made,. Section Showing Spring Which Elevates Harp,Spring-Tension Screw, Air Valves, Etc. each affording a different leverage to allow the retriever to beproperly connected to air-brake systems having pressures rang-ing from 60 lb. to 100 lb., and irrespective of the wheel pres-sure. The yoke is of malleable iron and is hinged to the baseby two j^s-in. steel studs held by cotter pins. The pole isscrewed to the yoke in the usual manner. There is bolted tothe yoke, near the pole end, a valve section made of solid castbronze, which eliminates the question of rust, and which is sosituated as to be free from dust and grease. This valve sectionis connected to the base by two flexible tubes, one of whichleads to a port entering both cylinders and the other throughthe base to the air-brake system. The springs are of the ex-pansion type, four to a base, i}i in. outside diameter, 15 , and 13-32 in. round. Nuts are screwed into the ends, toexpand the springs. The pole
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
