Abstract: A device for controlling the application of lubricant to parts of a locomotive or a vehicle is taught. Briefly stated, the distance traveled by the locomotive or the like is computed, with lubrication to a component then being provided. The distance between lubrication application may be adjusted, as well as the amount of lubrication being applied. Further, this rate and amount of lubrication, as well as the use of lubrication at all, can be manually or automatically adjusted according to various sensors such as braking, sanding, reversing curves or the like.

Abstract: A pressure locking cap for a pressurized vessel is screw threaded on its periphery for being screwed into a filling opening in the vessel. The top of the cap includes a socket for receiving a wrench for unscrewing the cap. A first piston in the cap communicates into the pressure of the vessel and the piston includes a piston rod which is moved into the socket to prevent insertion of the socket removal tool upon elevated pressure developing in the vessel. In an alternate embodiment, a second piston is placed inside the first piston and also communicates with the pressure of the vessel. A locking element, such as a ball, moves with the first piston through the cap body until the locking element moves even with a recess in the cap body.