Automatic Stop Block for the Safe Working of Trams or Tubs in Mines or Quarries.

摘要

111,205. Pritchard, D. Jan. 30, 1917. Wheel stops.-An automatic wheel stop for use in mines &c. comprises a block A pivoted at f on a base B formed with an inclined surface whereby the block normally rests across the rail against a stop e. Vehicles moving in one direction push the block on one side but are prevented from runing backwards.