GB121216A - Improvements relating to Grinding Machines applicable for Surfacing Rails in situ. - Google Patents

Abstract

121,216. Pescatore, A. B., and Pescatore, F. Jan. 23, 1918. Railway &c. rails, trueing and surfacing in situ. -In apparatus for grinding rails in situ, the frame carrying the grinding-wheel and equipment is mounted on feet adapted to stand on undefective portions of the rail on each side of the joint to be ground. The soles of the feet are adjusted into a succession of tangential positions across the rail along two guides, a tube d, and a channelgrinding-wheel is traversed longitudinally to make a succession of cuts at various angles corresponding to the contour of the undefective part of the rail. The grinding-wheel a., Figs. 2 and 5, is carried on a slide c mounted to move parallel with the rail along two guides, a tube d and a channeliron e. The guides are connected at their ends and form a frame, which is supported on feet i, j resting on standard parts of the rail. The feet are in line with the grinding-wheel and have the same width as the grinding-wheel. The frame is adjustable vertically relatively to the rail by nuts o, p working on screw-threads on the feet, which are keyed to slide through bearing-rings in the underside of the frame. The frame is supported by struts q, r secured to a vice s clamped on the opposite rail. The struts are pivotally connected to the frame on the axis of the rod d, and the inclination of the frame can be varied and set by screws o<1>, Fig. 4, on the frame engaging lugs d<2> on a part connected to the struts. This allows either the sole or the side of the feet to engage the rail, and either the periphery or face of the grinding-wheel to make the cut. The slide-rest is reciprocated by hand or mechanically by a pinion on a pivoted frame engaging one of two parallel racks, the pinion being driven by worm gearing from the motor driving the guiding-wheel. The ends of the racks overlap, so that, when the pinion runs off one rack, it may be moved across by hand to engage with the other rack. The struts q, r are connected by a member engaging a screwed rod t, whereby the frame can be moved transversely to the rail to enable the requisite number of cuts to be taken. To prevent the frame from moving along the track, two plates u, v, with slots through which the feet i, j project, are connected together by rods w, x and clamped in position upon the rail. To enable the grinding-wheel to move in a path which will render the rail joint smooth and continuous, an auxiliary guide-rail e<1> is provided, with which a roller f on the slide c engages. This guide-wheel e<1> is hinged in the centre and can be inclined to the horizontal.