Improvements relating to tubs used to convey coal or other minerals or materials in or about a colliery or other works

摘要

141,641. Tate, J. W. Dec. 8, 1919. Sides and floors.-A colliery tub is constructed with the metal sides and ends A, E formed with interengaging socket members so that bolts K may be passed therethrough and secured to the bottom of the vehicle. The bottom plate has an upturned edge L, and slots may be provided in which engage. projections on the bottom edges of the ends and sides. In-turned edges on the upper edges of the members A, E give rigidity to the structure.