Abstract: A railway car coupler includes a shank, a head connected to a head end portion of the shank, a knuckle pivoted to the head having closed and open positions, and a lock axially movable within a chamber formed in the shank between a knuckle engaged position for maintaining the knuckle in the closed position and a knuckle disengaged position for enabling the knuckle to be pivoted to the open position. A thrower is pivotally connected to the lock and has an arm disposed to one side of the pivot for engaging the knuckle to rotate the knuckle to its open position. An actuating mechanism is connected to the thrower-lock assembly and is axially movable within the chamber. The actuating mechanism functions to axially move the lock towards its knuckle disengaged position, with continued movement of the actuating mechanism in the same direction pivoting the thrower and consequentially the knuckle to its open position after the lock has obtained its knuckle disengaged position.

Abstract: A knuckle railway car coupler includes latching means for maintaining the coupler locked when the coupler is placed in an inverted position. The latching means includes a latching member connected to the lever of the rotary lock-lift assembly of the coupler and is supported thereon in an inoperative position when the coupler is in its normal, upright working position. An abutment member extends into the chamber defined by the coupler head. The latching member is spaced from the abutment member in the inoperative position and moves into engagement therewith when the coupler is inverted to prevent rotation of the lock-lift assembly and subsequent movement of the coupler lock between locking and unlocking positions.

Abstract: A railway car coupler includes a knuckle locked in a closed position and movable into an open position upon opening of the lock and actuation of a thrower arm engaging the knuckle. The thrower arm is configured to limit the shortening of the knuckle opening moment during the knuckle opening movement.