An improved automatic device for locking tubs in mine cages and for similar purposes

摘要

140,621. Walden, T. A. C. April 17, 1919. Axle stops for locking tubs in mine cages comprise pivoted one-way catches a carried by the cage and adapted to engage the axles g of the tubs, these catches being operated by the oncoming tub through counterweighted arms f acting on push-rods m, m1. Thus, a tub enter. ing from either end releases the catch farthest from it, so that it can push out the tub already on the cage, after which it is itself locked in position by the catches.