Abstract: This invention relates to a pivoted double handle self-locking mechanism for operating a valve. Each of a pair of oppositely extending handles is pivotally mounted on a socket member secured to a key that rotates the valve, each handle being provided with a gear segment that meshes with a corresponding gear segment on the other handle whereby rocking of either handle about its pivot by a lever connected thereto effects rocking of the other handle so that a lug on one handle is moved to a position in which it will not engage a stop carried by the valve body upon subsequent arcuate movement of both handles while in their rocked position in response to a manual pull exerted on the lever connected to either one of the handles.

Abstract: An upgraded railway freight car brake control valve device comprises a novel emergency valve portion that embodies therein a plurality of simple and inexpensive poppet valves that replace yet perform the same functions heretofore performed by more expensive slide type valves which slide valves, and the flat seats upon which they slide as they are shifted from one position to another, in their manufacture require a considerable amount of accurate machining thus increasing the cost of the valve device of which they are an important part.

Abstract: A novel, low-cost pipe bracket which is provided with drill holes instead of pre-cast passageways as formed in a casting type bracket, said drill holes being disposed to register with the connection ports of any fluid pressure operable device to be mounted on the bracket. A pipe connector, either of the screw-threaded or butt weld type is placed in each drill hole and secured therein by a flange formed on the connector being drawn up against a shoulder formed in the drill hole when the valve device is secured to the pipe bracket. Thus, when the pipes have been connected to the pipe connectors, the valve device may be removed without disconnecting the pipes from the bracket.