Hopper car door locking mechanism
 The locking mechanism comprises a clevis arrangement on a hopper door which is engaged by a jaw positioned centrally on a hopper structure. A locking bar is provided which extends to the outer edge of the hopper structure and is connected to rotate with a locking plate which is manually actuated. A safety pawl is provided to prevent inadvertent rotation of the locking plate. 
Pullman Incorporated
B
B61D
inventional
Dennis B.
Marsden