Corus UK Limited

Other

David Farrington

Christopher John Cedric Jones

William H Hodgson

John Barry Clarke

David John Thompson

Paul Kitson

Lesley Hodgson

A damper () for a rail (), includes a deformable material () and an elongate resonant member (), the resonant member being of a stiff material as compared to the deformable material and being sized to exhibit a resonant frequency in the range of vibration frequencies of the rail, wherein the resonant member includes a clip () extending therefrom so as to retain the resonant member and the deformable material in place on the rail. The clip preferably extends laterally of the resonant member to grip the underside of the rail. The clip can have an engagement formation on the end thereof, to engage with a like formation of a further damper located on the opposing side of the rail.

Rail damper

A rail damper including an elongate damping device and a clip for supporting the damping device, the clip having a retention aperture for receiving part of the rail and, further, a recess adapted to receive the damper. This is particularly (although not exclusively) suited to dampers in which an elongate hollow rigid section encloses a deformable material in which is suspended one or more resonant members. The clip can be adapted to fit around the foot of the rail. It can include one or more tongues extending alongside the web of the rail. This will assist in separating the damper from the web while still allowing vibrations to be conducted from one to the other. The tongues can be any suitable height, for example the full height of the web, or the full height of the dampers, or less than one or other such heights. Additionally, a damper for a rail is disclosed, which includes an elongate hollow rigid section enclosing a deformable material in which is suspended at least two resonant members, the resonant members being sized to exhibit a resonant frequency in the range of vibration frequencies of the rail.

A damper for reducing the track nose emitted by a rail system comprises a deformable material attachable to a surface of the rail, incorporating a plurality of elongate discontinuous resonant members of a stiff material as compared to the deformable material, sized to contain at least two resonant frequencies in the range of interest. The resonant members are suitably of steel or other metallic material. They can be of different profile, to form a resonant system with at least two resonant frequencies in the relevant frequency range. They are suitably embedded in the deformable material, to ensure adequate vibrational transfer from the rail to the resonant members and also provide environmental protection. The deformable member is visco-elastic, for example rubber or rubber-like material. This may be preformed and glued to the rail, or it can be cured in place on the rail. The damper is positioned on the rail at the junction between the web and the foot of the rail. One resonant member can be an elongate angled section, the angle preferably matching the angle between external surfaces of the head and foot. Another resonant member can be a solid elongate block, the external faces adjacent the web and foot being angled to match.

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Penrith, United Kingdom

David Farrington