Abstract: An uncoupling device for rotary dump cars in which the car couplers are of the bottom operating type, wherein at each end of the car the uncoupling mechanism is made of the same type, and comprising both the rotary and non-rotary couplers of the car being equipped with paddle type lock lifters having a pivotal operating stroke that unlocks and opens the coupler knuckle, and a bail type actuator therefor, wherein the actuator comprises a bail member mounted on the end of the car to receive the car center sill and swing about a horizontal axis extending crosswise of the car and located at approximately the level of the top of the car center sill and inwardly of its striker. The bail member has a striker section that underlies the center sill and is equipped with a paddle striker that is arced to accommodate coupler side swing.

Abstract: A safety mine car coupling and uncoupling apparatus, adapted for attachment to the hitch of a conventional mine car to insert and withdraw a coupling pin, comprises a base plate attached to a member for guiding the travel of the coupling pin and one or more lever arms pivotably mounted on the base plate and extending beyond the plane of at least one lateral side of the car to permit an operator to couple and uncouple the car without standing between cars.