18,661. Gilfillan, J. R. Feb. 11, 1908. Wedges.-A combined wheel and slipper brake is applied by a double wedge through arms which also exert a braking action on the track. Two parallel cross-bars C, placed transversely of the vehicle, have pivoted thereon the two arms B, B1, each fitted with a brake shoe. The arms are joined together by a pair of iron straps E, the bolts W, W1 extending across the vehicle to the arms on the other side. The slipper brake A is suspended by springs (not shown) from eyebolts Y, and to its upper side is secured the lower half A2 of a double wedge A', Figs. 1 and 2. The upper half A3 of the wedge has eyes to which links D are secured, the links D applying wheel brakes D'. The operating chains or levers are secured to the bolts W, W1, which, on being pulled, cause one of the arms B, B' to move nearer to the vertical until it comes on to the rail. In doing this, the arm moves the slipper A horizontally, and, by reason of the wedge, the slipper brake descends on to the rail while the upper part of the wedge rises and applies the wheel brakes.
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