Abstract: A housing has a triple valve coaxially adjoining a proportioning piston valve end-to-end, the triple valve having supply, lap and exhaust positions for governing pressure in a brake cylinder; and the proportioning piston valve being operable to sense an emergency signal in a brake pipe for delivering fluid from an emergency reservoir to the brake cylinder after the brake cylinder has been charged to substantially service pressure from an auxiliary reservoir. The triple valve and the proportioning valve piston are biased in opposite directions by the same biasing spring.

Abstract: A parallel beam brake apparatus for dual and triple axle trucks and a single beam brake apparatus for single axle trucks each comprise spaced, pivotably mounted bell crank levers which engage a fluid operable actuator between one pair of arms and engage a pair of push rods with the remaining arms. Improved spherical joints between the arms and the push rods facilitate force tranmsmission without allowing push rod rotation. A unique pivot geometry between the bell crank levers and the brake beams facilitates assembly and improves stress distribution between the levers and the beams. The actuator includes a slack adjustor mechanism in which a spiral power spring unwinds to drive a lead screw and take up slack or is wound by the rotating, translating lead screw to add slack.

Abstract: A protection valve device for a spring parking brake control system has a pipe bracket for connection in a normally pressurized brake pipe, the pipe bracket having connected thereto a protection valve, a charging reset valve and a charging check valve. The protection valve has a chamber at one side of a piston normally pressurized by pressure at a spring parking brake cylinder port and monitors the spring parking brake cylinder pressure to vent fluid from the brake pipe to automatically cause an emergency brake application if such pressure indicates a spring parking brake is applied. The charging reset valve prevents the venting of brake pipe fluid during charging of the brake pipe and spring parking brake system.

Abstract: A fluid pressure brake control system of the direct release type for a freight locomotive comprises a first pipe bracket having a manually controllable automatic brake valve device connected thereto on one side for governing fluid brake control pressure in a train pipe, and a manually controllable independent brake valve device is connected on another side of the bracket for governing brakes of the locomotive independent of brakes of freight cars in a train. There is a locomotive brake control valve device comprising a second pipe bracket having a service valve portion secured to one side thereof corresponding to a service valve portion such as is conventionally used on freight car control valve devices. A quick release and emergency valve portion is secured to another side of the second pipe bracket for governing emergency brake pressure and for governing independent direct release of brakes of a locomotive in response to actuation of the manually controllable independent brake valve device.

Abstract: A motor rotated agitator is adapted to be inserted within a container of liquid wherein the agitator has a plurality of curved blades secure at their top edges to a disc adapted to be rotated by a motor. The lower edges of the blades have a circular plate secure thereto, having a central circular opening for input of fluid to inner ends of the blades. A sparge ring is disposed about the periphery of the agitator for ejecting a gas into output of fluid at the periphery of the agitator in an area spaced from the input area of the agitator, which is limited by use of the circular plate.