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Catherine L. Gibbon: Improvements in Street Railway Construction, 1892

The Rail

The Gibbon track was composed of four main parts: the rail, the chair, the tie-bar, and the wedge.

The rail consisted of a head section and a flange section. The web of both sections, located directly under the center of the bearing surface, was mortised every two and one half feet of the rail to receive the wedge locks. Combined, the two sections created a complete rail; where head sections joined they were supported by solid flange section and where flange sections joined they were supported by solid head section. Through this series of underlapping and overlapping rails, a jointless track that evenly distributed load was formed.

rails
Click image for larger view of the rails. (850K) (From Gibbon Catalogue)