GB338966A - Improvements in and relating to iron railway sleepers - Google Patents

Abstract

338,966. Buchholz, T. Nov. 20, 1928, [Convention date]. Sleepers, metal; railway permanent way.-Iron railway sleepers, formed from a long rolled bar with thickened parts for rail-securing purposes and cut into sleeper lengths, have the thickened parts a, Fig. 4, formed into guide ribs for the rails, with or without rail seats. The sleeper lengths are re-rolled, pressed or forged to form swells for the guide ribs, and at the same time the rail seats may be inclined. If forged, the sleepers are capped at the ends at the same time. A central reinforcement b enables the gauge to be adjusted in the final pressing. Sleepers metal, and securing rails thereto; chair keys; railway permanent way; forging- punches; die-rolling.-The Specification as open to inspection under Sect. 91 (3) (a) comprises also the following subject-matter. The reinforcement may extend around the sleeper, Fig. 14, (Cancelled) and the guide ribs are upset by pressing. The bolt recesses to the ribs may be finished by this pressing or by subsequent milling. The rail seat may be widened in forming the swells and the swells reduced by milling out the parts f, g, Fig. 17, (Cancelled). Recesses may be rolled in the swells to facilitate forming undercut recesses for the bolt-heads. The bolt-head recesses in the ribs d, Fig. 25 (Cancelled), may be undercut by drifting with a tool n, expanding from a rectangular part o to a part p having the finished form of the recess. The tool n is used with a block m having a groove for the drift and transverse grooves for the guide-ribs. The recesses c, Fig. 30, (Cancelled), may be widened from both sides by a shoe-shaped p, or widened from one side by the punch and drifted from the other side. The material between the ribs d, Fig. 31 (Cancelled), may be pressed down to form a longitudinal or transverse rib t, s at the centre of the rail sea, or transverse ribs at the ends of the seat with intermediate inclines to engage the ballast. The guide ribs X, Fig. 34 (Cancelled), may be undercut by milling, drifting, or bending as shown at Y to form parallel or inclined ways for keys Z used to secure the rails. The guide ribs d, Fig. 22 (Cancelled) may be bent outwards to form a recess c for the bolt heads, while the clips i engage stops h. The sleeper top is forced up at k to strengthen the rail seat. The Specification also contains the subject-matter of Specifications 338,986 and 338,987. This subject-matter does not appear in the Specification as accepted.