The Locomotive Of Today

The Framing, Wheels, etc. : Bissel Truck. 145 at the bottom and the arms, which are carried through the sockets, have placed upon them rubber pads and nuts, so that as the bogie moves sideways for the passage of a curve the rubber pads upon one arm are compressed, and on returning to the straight both rubbers steady the engine. All the bearing springs in this type of bogie are made independent of each other and not connected by a craclle, the weight is carried as before on a cross frame, or upon slides at each side of the bogie. The American type, or swing link bogie, differs from the last described, in that the controlling gear is vertical instead of horizontal. The framing, which is there usually of bars, is arranged in the form of a large square, with pedestals or guides for the axle boxes attached, transversely across the frame two other bars pass on each side of the centre and can-y a casting-, which is recessed at the top to receive the bogie pin fixed to the main frame of the engine, this centre is coupled to the crossbars by hanging links from projections upon the sides of the centre plate, reaching up and coupled at their top ends by pins passing through the crossbars, so that the bogie may turn about its centre, or swing towards either side without affecting the centre line of the engine, and the whole is centred by the weight carried upon the bogie. Side controlling- springs are in some cases fitted to assist in keeping the engine steady on a straight road. A centre bolt passes through the whole structure as before, to .prevent the engine from jumping up and allowing the centre pin to get out of the shallow hollow in the centre plate in which it bears, when running over an irregularity in the road. The axle boxes are coupled together by means of a cradle, and one spring acts. for two boxes, as in the Adams’ bogie. The swing links have great smoothness of action, and less friction than slides and springs, and are therefore very much easier, and lessen the strain upon the leading flanges when taking a curve. Although this type is called the American, a very large number of engines there are fitted with the rigid centre bogie, which has. turning but not lateral motion. When the weight carried by the leading end is not exces- sive, or for other reasons a bogie is not used, a single pair of' wheels are employed, one method of providing such a single pair with a radial motion is as at A, Fig. 30, which is a side elevation of a Bissel truck. It is of a form usual in America for “Mogul” or “ Consolidation ” engines. A rectangular frame of iron about 4-in. deep by i-in. wide has fixed to it guides or hornplates, which are carried down, and have the axle boxes sliding between them; projecting upwards on each 10