Patent GB-190815750-A (GB)
Title: Improvements in and relating to Trucks for Railway and Tramway and like Vehicles.
Inventor: CURWEN MASKELL EWING
Filed: 1908-07-24
Granted: 1909-05-20
Abstract: 15,750. Curwen, M. E., [Brill Co., J. G.]. July 24. Locomotive railway and tramway vehicles. - In a maximum - traction truck for electrically propelled vehicles, improvements are-effected in the framing and the means for supporting the motor, in the spring plank and the means for suspending it from the side frames, in the bolster and the arrangement of springs for supporting it from the spring plank, in the centre bearing, in the compression guide for the spring and plunger which force the rear wheels on to the rails when a curve is being traversed, and in the means for suspending the electriccontact plough. The side frames comprise the pedestals 11, 12, preferably formed integrally with the top chord 13, the tie-bar 14 bolted to the pedestals, and the projecting arms 17 connected by the bar 18 adapted to support the motor through the spring device 19. Plates 20 are secured to the pedestals 12 and are connected by the cross-bar 21. Transoms 22, 23, secured between the top chords 13, are separated by U-plates 24, the transom 23 being shaped as shown to accommodate the bolster. Hangers 25 are suspended from the top chords 13 and have upwardly projecting points 26, Fig. 8, which enter grooves in blocks 27, in which are journaled the equalizing-bars 28 to which the bars 29, Fig. 10, constituting the spring plank, are bolted. Or the spring plank may be formed of two angle-bars 32, 33, Fig. 14, adapted to be secured on top of the equalizing-bars and with the centre portion bent downwards so as to bring the spring cups 35 as low as possible. The bolster is supported by a pair of diagonally disposed elliptical springs 36, and may be formed of a pair of bars 38, 39, secured by the box-like bands 40 and by the rub plates 42, the depending lugs 43 of which are riveted to the bars. Or the bolster may comprise a pair of parallel bars, 81, Figs. 20 and 22, united by bands 82 and plates 83 ; an upwardly bent plate 87 bolted to the band 82 carries the rub-plate 88, while a spring cap 84 is secured to each plate 83. Metal shelves 44 fixed to the bolster carry a cup 45, Fig. 5, for the cones 46 of the centre bearing, the upper bearing 47 for the cones being carried by a plate 48 secured to the car body. Arms 49 integral with the plate 48 unite to form a bearing 50, disposed nearly over the axle, for the king bolt 51, which may be integral with the wish-bone bracket 52 fixed to the bolster bar 39 by the flange 53. Longitudinals 54, extending horizontally from the cross-bar 21 and vertically to the transom 22 are connected by a transverse bar 57, which carries a bracket 60 provided with an opening for the plunger 63, adapted, under the action of the cam-plate 64 secured to the car body, to compress a coil spring seated on the bar 57 and so to force the trailing wheels on to the track when passing round a curve. The compression guide may otherwise be formed of a pair of bars 75, 78, Figs. 17 and 18, similarly shaped except that the bar 78 is offset at 77 from the bar 75 to form a rectangular opening for the plunger 63. The horizontally bent ends 76 of the bar 75 serve for securing the guide to the transverse bar 57. The electric-contact plough 73 is carried by sliding collars 72 on bars 71 secured by bolts 70, Fig. 6, in brackets 66 suspended from the longitudinals 54 by bolts 68 passing through slots 67. The inside surface of the brackets 66 is roughened, and a corresponding roughened shoe 66a is provided on the longitudinals 54.