. Electric railway journal . I-beams 15 in. deep and weigh-ing 42 lb. to the foot. This frame is 13 ft. long over end members are 15-in. 33-lb. channels and the inter-mediate cross-members are 12-in. I-beams and a9-in. channel. The motor is mounted on a subframe builtof 6-in. I-beams and covered with a y%-. plate, 38 in. x29^4 in. in area. The trolley stand is made of extra heavy5-in. pipe and is 7 ft. 6 in. high. Its base is bolted to theheavy end sill of the underframe and is guyed in three di-rections. The post fits over a casting which is bolted to theend sill so that a ve
. Electric railway journal . I-beams 15 in. deep and weigh-ing 42 lb. to the foot. This frame is 13 ft. long over end members are 15-in. 33-lb. channels and the inter-mediate cross-members are 12-in. I-beams and a9-in. channel. The motor is mounted on a subframe builtof 6-in. I-beams and covered with a y%-. plate, 38 in. x29^4 in. in area. The trolley stand is made of extra heavy5-in. pipe and is 7 ft. 6 in. high. Its base is bolted to theheavy end sill of the underframe and is guyed in three di-rections. The post fits over a casting which is bolted to theend sill so that a very secure support is given for the trol-ley base. With each rail grinder the manufacturer sup-plies a Bayonet trolley harp, stand and wheel. The underframe of the rail grinder is supported on4-in. street-car axles equipped with 33-in. 500-lb. standardstreet car wheels and journal boxes. This running gearpermits the operation of the car at comparatively highspeeds on long runs from one part of the railway systemto Rail Grinder—Side and End Views cup is thereby delayed. Similarly, the grinding ofspecial track-work rail heads, joints and hard centers isprofitable because it improves the riding qualities of thetrack work and prolongs the life by removing any un-evenness which may cause vibration and destruction of therail head. Several of the larger city properties have pur-chased these rail grinders for removing corrugations fromdifferent classes of track work. The cost for grinding outcorrugations is said to be from \l/2 cents to 2j4 cents perfoot of rail according to the depth of the waves. Accompanying engravings illustrate the appearance ofthe rail grinder arranged for operation. Briefly describedit consists of a steel underframe mounted on four carwheels, a driving motor and a group of friction wheelsand driving belts which operate emery wheels supported bya carriage which slides along the track rails. The machineis designed with a view to operating from one part
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
