摘要:
A holddown assembly fastens a railway rail to a transversely extending hollow sleeper formed with a vertically throughgoing hole. An upwardly projecting lateral brace element is provided on the sleeper offset from the hole, and the assembly has a body fitted between the rail and the brace element and transversely bracing the rail against the brace element. An anchor of the assembly is engaged through the hole, projects upward from the sleeper, is transversely shiftable in the hole, and bears upward on the sleeper. A spring clip is pressed by the anchor down against the rail and presses the rail down against the metal sleeper.
摘要:
A sleeper having two pairs of protuberances upstanding from its upper portion, the protuberances of each pair defining between them a rail seat, apertures in the upper wall of the sleeper which extend from the protuberances for a short distance away from the rail seat, four U-shaped clips engaging each sleeper, each U-shaped clip having an upper toe, which bears downwardly on the upper portion of the rail, a heel engaging the upper surface of the sleeper adjacent the relevant aperture, and a lower toe extending through an aperture in the rail and bearing upwardly against the undersurface of a respective protuberance.
摘要:
An insulating device comprising an electrically insulating member and a metallic reinforcing member is to electrically insulate a flange-footed railway rail from a rail clip, which bears downwardly upon the upper surface of the rail flange, and from an anchorage for the clip, this anchorage being at one side of the rail flange. A first portion of the insulating member, which is to lie on the rail flange, is surmounted by an elongate portion, having a flat bottom, of the reinforcing member and a second portion of the insulating member is to be between the edge of the rail flange and the anchorage. The reinforcing member has at least one reinforcing rib extending along and upwardly from the elongate portion and it has two sideways projections which are to extend on opposite sides of the anchorage to prevent the reinforcing member moving along the rail. No part of the reinforcing member is below the plane containing the flat bottom of the elongate portion.
摘要:
An anchoring device for use in anchoring a railway rail-fastening clip to a foundation for a railway rail has a head part, which anchors the clip and is to lie above the foundation, and a tail part which is to lie in the foundation and is in the form of a single vertical rod. At least one vane, to resist turning of the device about its vertical axis, has its upper extremity joined to the bottom of the head part and has one of its sides joined to the upper portion of the tail part, the vane having a vertical length and a horizontal width greater than its horizontal thickness. At least one projection, below the vane or vanes, projects laterally from the tail part and has a horizontal or nearly horizontal top, the projection or projections serving to resist vertical forces tending to pull the anchoring device vertically upwardly out of the foundation.A concrete rail tie may have the tail parts of four of such anchoring devices embedded in it and a railway rail-and-fastening assembly may comprise a concrete foundation, a rail lying on it between the head parts of two such anchoring devices and two clips anchored by the anchoring devices and pressing downwardly on opposite sides of a flange at the bottom of the rail.
摘要:
The device comprises a spring fixed to a support at a point remote from the rail and curved in the direction of the rail, and a swing block interposed between the spring and the flange of the rail. The swing block bears against the flange of the rail at one end and against the support at its opposite end. The swing block is clamped by the end of the spring which applies a clamping force at point located at a distance from the flange of the rail but in the vicinity of the flange so that the two lever arms of the swing block have very different lengths. Further, the spring has a thickness which decreases in the direction of the rail and bears against the swing block by its end which is curved, the swing block having a corresponding shape under said end.
摘要:
A rail clip for securing a rail to a tie wherein there is a shoulder upstanding from the tie having an aperture extending through it in a longitudinal direction, the shoulder containing a pin of general U-shape which bears downwardly intermediate the ends of a resilient plate-like clip which in turn bears downwardly against the rail foot and the tie.
摘要:
An anchorage for a flanged rail having a base supporting a resilient clamping element having a part projecting beyond the base to locate over the flange of the rail has one or more ears integral with and extending from the base in the same direction as the projecting part, to extend above the rail flange. These ears engage with the rail flange if the rail is significantly distorted and thus limit the strain on the clamping element.
摘要:
A hook bolt for fastening rails to hollow sleepers, in particular steel sleepers, including an engagement element made of cast metal, which has a hook-shaped insertion section and a contact section, which has a receiving space for receiving a threaded element, wherein the threaded element has a threaded bolt and a receiving shoe and the receiving shoe is dimensioned in such a way that the receiving shoe can be inserted into the receiving space of the contact section in a form-fit manner.