Locking device for pneumatic outlet requiring tool to open the end cap

Claim 1

In a pneumatic outlet having a "U" shaped bail assembly pivotally mounted on the end wall of the outlet, including a pair of arms which extend generally parallel to a discharge tube of the outlet extending outwardly from said end wall, and a bracket portion which extends generally transverse to the longitudinal axis of the discharge tube and is attached to said arms; a removable end cap which in closed position covers the end of the discharge tube; a locking handle pivotally mounted on said bracket portion which engages said end cap in a closed position; the locking handle being movable to a closed position to maintain the end cap in place on the discharge tube; the improvement comprising: a locking assembly to prevent the locking handle from being moved from the closed position, the bail assembly raised and the end cap removed without the aid of an unlocking tool; said locking assembly including a locking member pivotally mounted on at least one bail arm; a distal end portion of the locking member engaging an end portion of said locking handle to maintain the locking handle in said closed position engaging the end cap; a fastener requiring an unlocking tool for operation extending through a first opening provided in the locking member and through a second opening provided in the bail arm; said fastener having a head at one end for receiving an unlocking tool, said fastener having at its other end a protrusion transverse to the axis of the fastener which in locked position engages the inner surface of the bail arm, substantially reducing the liklihood that the bail and end cap will be tampered with in rail yards, whereby when said fastener is engaged by an unlocking tool the fastener and protrusion are movable through the said second opening allowing the locking member to be pivoted about the pivot point, allowing the handle to be manually removed from the closed position, the bail assembly raised and the end cap removed; the protrusion on the fastener not being movable through said first opening so that the fastener will remain attached to the locking handle and will not be lost when the end cap is removed and the outlet is unloaded.