. Railway mechanical engineer . Fig. 3—Position of Generator Effect of Weight is a the lug D on the generator frame. The tension of the belt isthe result of two varying factors, one of which is the horizontalcomponent of the weight of the generator, and the other the ten-sion of the spring. When the generator is hanging as shown inFig. 2 so that its center of gravity is directly under the support-ing bar C. the weight of the generator has no effect on the ten-sion of the belt, but the tension of the spring has its greatesteffect, since the lever arm, CX. is greatest. When the generatoris swung
. Railway mechanical engineer . Fig. 3—Position of Generator Effect of Weight is a the lug D on the generator frame. The tension of the belt isthe result of two varying factors, one of which is the horizontalcomponent of the weight of the generator, and the other the ten-sion of the spring. When the generator is hanging as shown inFig. 2 so that its center of gravity is directly under the support-ing bar C. the weight of the generator has no effect on the ten-sion of the belt, but the tension of the spring has its greatesteffect, since the lever arm, CX. is greatest. When the generatoris swung into the position shown in Fig. 3, the effect of itsweight is a , while the effect of the spring is decreaseddue to tlic shortening of the distance CX. The parts are so de-signed that the combined effect of these two factors is practicallyconstant in all positions. Ample latitude is provided betweenthe two extretiio positions shown to take care of lielt stretch and. limited the space available for applying the generator to such anextent that it is difficult to obtain the proper clearances for thegenerator and the driving belt. The suspension of the generatorfrom the truck frame also produces an unbalanced condition inthe loading of the equalizer coil springs, and the suspension is the varying location of the axle due to the curving of the spring is assembled on a carrier under tension so that it maybe easily applied and removed. A simple means of lining the generator with the car axle isprovided. The hole for the supporting bar in the lug B is slotted,the position of the bar in the slot being readily adjusted andlocked by means of the bolt and lock nuts shown in the en-gravings. With the increased belt clearances obtained with this equip- 258 RAILWAY AGK GAZETTE, MECHANICAL EDITIOxX \0L. 89, No. S mciit it has been possible to use a type of belt fastener wliiclioperates properly on small pulleys. A smaller armature pulleyhas therefore b
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
