Abstract: A brake control valve device operated by a reduction in brake pipe pressure on one side of a movable abutment relative to control reservoir pressure on the opposite side embodies in the abutment a control reservoir charging valve mechanism, a filter and a choke arranged in series. The valve mechanism comprises a spring-biased valve slidably mounted in a ported bushing carried by the abutment. Two spaced-apart stops carried on the abutment enable relative movement between the abutment and the valve whereby, in one position of the valve, fluid under pressure may flow from the brake pipe to the control reservoir to effect charging thereof via the ported bushing, a passageway in the valve and the choke, and, in a second position of this valve, this charging communication is closed.

Abstract: This invention relates to a pneumatically-applied spring-released brake assembly for each individual wheel of a railway vehicle truck, wherein the brake assembly comprises a pair of levers that so cooperate with non-self-locking threads formed on a nut and a screw member as to provide a high mechanical advantage or multiplication of the braking force transmitted from a piston to a brake shoe thereby enabling a substantial reduction in the diameter of the piston and therefore of the size of the brake assembly from that of such assemblies heretofore necessary to transmit the same braking force to the shoe.

Abstract: This invention relates to a braking apparatus wherein the heat absorbing mass of a rotating braked element, such as a vehicle wheel, is increased by securing to such as each wheel of a vehicle, a brake drum, the peripheries of the wheels and drums constituting braking surfaces against which a plurality of brake shoes are pressed during a brake application by a movable member between which and each pair of the plurality of brake shoes there is interposed an equalizer lever that is pivoted intermediate its ends on the movable member, each equalizer lever being thereby rockable relative to the movable member to enable each one of the corresponding pair of brake shoes to transmit substantially the same braking force to the braking surface braked thereby notwithstanding the rate of wear of either one of any pair of brake shoes exceeding that of the other brake shoes.

Abstract: This invention relates to a railway locomotive brake control apparatus operably either manually by an engineer or automatically in response to a change in a train control signal indication to a more restrictive indication to effect a brake application on the locomotive and a train of cars hauled thereby unless the automatic train control brake application is suppressed by the engineer manually effecting a full service brake application. When the engineer thus manually effects a full service brake application upon the occurrence of the more restrictive signal indication, the fluid under pressure released from the train brake pipe to cause this brake application is used to temporarily suppress the automatic train control brake application so long as fluid under pressure is being released from the train brake pipe to atmosphere via a restriction.

Abstract: This invention relates to a braking apparatus wherein the heat absorbing mass of a rotating braked element, such as a vehicle wheel, is increased by securing to, such as each wheel of the vehicle, a brake disc of such size as to constitute a heat sink capable of absorbing the heat generated by a pair of brake shoes when in braking engagement therewith, the periphery of the wheel forming a braking surface that is simultaneously engaged by a third brake shoe whereby the wheel constitutes a second heat sink capable of absorbing the heat generated by the third brake shoe.

Abstract: The present invention refers to an automatic slack adjuster to regulate the slack between a rotating disc that is secured to a railroad car axle, and a braking element which is brought into contact with the rotating disc, to brake it. The slack adjuster is inserted in a pneumatic brake cylinder. This brake cylinder includes at least one piston the purpose of which is to move axially when the cylinder is activated, and a driving shaft or piston rod connected with the braking element.

Abstract: A braking apparatus wherein the heat absorbing mass of a rotating braked element, such as a vehicle wheel, is increased by securing to such as each wheel of a vehicle, a brake drum, the peripheries of the wheels and drums constituting braking surfaces against which a plurality of brake shoes are pressed during a brake application by a movable member between which and the brake shoes there is interposed a mechanism that provides for shifting of the brake shoes relative to the movable member in such a manner as to enable each brake shoe to transmit substantially the same braking force to the corresponding braking surface notwithstanding the rate of wear of one shoe exceeding that of another.

Abstract: A service valve portion of a railway vehicle brake control valve device embodies large capacity spool-type brake cylinder application and release piston valves and a small spool-type valve for controlling the supply and release of fluid under pressure to and from the application and release piston valves and also the reservoir charging and quick service features.

Abstract: This invention relates to a brake shoe and brake head assembly wherein a brake head for carrying one type of brake shoe may be modified to enable securing thereto and removing therefrom other types of brake shoes without removing the brake head from a brake lever on which the brake head is pivotally mounted.

Abstract: The present invention concerns automatic fluid brake devices in which the fill and discharge of the brake cylinder or cylinders of the equipment are controlled by a device functioning as a distributing valve in relation to pressure variations in the brake pipe.In the aforementioned automatic braking devices generally used for rail vehicles, and commonly known as distributors, the brake cylinder pressure obtained during the braking process is a function of the pressure in the brake pipe.The present invention concerns distributors of the graduated release type, in which brake release is not only initiated via pressure increase in the brake pipe, but it is entirely a function of the pressure increase in this brake pipe.More specifically, the present invention concerns the type of graduated release distributor in which the discharge is adjustable, and the brake is inexhaustible regardless of the manner in which the valve is manipulated by the engine driver to carry out braking or brake release.

Abstract: This invention relates to a molded fluid circuit plate which is used in a circuit module that distributes fluid under pressure to a plurality of logic control valve devices that may be removably secured to the circuit module. This molded fluid circuit plate constitutes a slab that has formed in either one or both of its sides, or has extending therethrough, a plurality of polygonal chambers, each chamber being separated from the adjacent chambers disposed thereabout by a plurality of partitions. When the chambers are formed in one or both sides of the circuit plate, one edge of each partition is integral with and severable from the corresponding side of the circuit plate.

Abstract: This invention relates to a disc brake apparatus wherein a plurality of brake shoes, that transmit braking force to a plurality of rotating discs, when worn to their minimum allowable thickness, may be replaced with new brake shoes, without disassembly of the disc brake apparatus, by unlocking, rotating through an angle of one hundred and eighty degrees, and thereafter relocking a plurality of pivotally mounted arms each of which may have attached to and detached from its respective ends a worn brake shoe and a new brake shoe, the rotation of each arm moving a new brake shoe to the position formerly occupied by a worn brake shoe thereby enabling the new brake shoe to transmit a braking force to the rotating disc formerly braked by the worn brake shoe.

Abstract: Apparatus on each vehicle in a train, for effecting a release of an emergency brake application upon a complete stop of the train, comprises a fluid pressure operated brake pipe vent valve device that is supplied with fluid under pressure from a quick action chamber when the emergency brake application is effected, a release valve device operable upon the release of fluid under pressure therefrom to vent fluid under pressure from the brake pipe vent valve device to atmosphere to cause closing of the brake pipe vent valve thereby enabling recharging of the brake pipe to effect a release of the prior emergency brake application, and a speed responsive device for supplying fluid to the release valve device at a pressure proportional to the speed of the train.

Abstract: This invention relates to a cycling-type continual quick service valve device which embodies therein a quick service valve means that comprises two valves each operatively connected to an abutment subject to fluid under pressure supplied from a train brake pipe through a first restriction to a chamber on one side thereof and subject to fluid under pressure supplied from the brake pipe to a chamber at the opposite side and to a quick service chamber via two restrictions arranged in parallel and in series with a third restriction, the sizes of these three restrictions being such that the rate of flow of fluid under pressure therethrough is less than the rate of flow through the first restriction. A check valve is arranged in series with one of the two parallel arranged restrictions so as to prevent flow therethrough in the direction from the chamber at the opposite side of the abutment to the brake pipe.

Abstract: This invention relates to a fluid pressure operated disc brake assembly that includes a tandem-arranged spring-applied fluid-pressure-related brake operating unit and an automatic slack adjuster mechanism which is actuated by a pair of springs to so compensate for wear of a disc brake rotor and/or brake shoes therefor that the brake shoes, while the brakes are released, are constantly lightly pressed against the brake rotor notwithstanding prior wear of the shoes and/or the rotor.

Abstract: When the deceleration of a vehicle wheel exceeds a certain chosen value, a wheel-slip-responsive means causes operation of a valve to close communication between a hydraulic master cylinder and a hydraulic brake-applying cylinder and connect this brake applying cylinder to a volume chamber to thereby release the braking force on the wheel until this wheel accelerates back to an angular velocity that corresponds to the linear velocity of the vehicle.

Abstract: Apparatus for varying the time between the initiation and subsequent release of an emergency brake application on a locomotive and train of cars hauled thereby comprises either fluid pressure operated valve means operable, by fluid under pressure supplied for causing knockout of the locomotive power supply, to establish communication between two reservoirs, separably charged from the train brake pipe, whereby substantially all of the fluid under pressure must be released from both reservoirs to atmosphere via a first restricted communication prior to the release of an emergency application thereby increasing the time between initiating the emergency application and the subsequent release, or fluid pressure operated valve means operably responsively to power knockout to establish another restricted communication between a single reservoir and atmosphere whereby substantially all of the fluid under pressure must be released from the single reservoir to atmosphere via the two restricted communications simultaneo

Abstract: This invention relates to locomotive brake control apparatus operable responsively to a reduction of the pressure in a train brake pipe as a result of train separation at a location in the train remote from the locomotive to cause cut off of the locomotive power supply, cut out of dynamic brakes, sanding of the rails, and a service brake application on the entire train.

Abstract: This invention relates to a pump unloader that includes two cylindrical valve members of the same diameter slidably mounted in the same bore and each biased in the same direction by its own spring. These valve members are so connected by a lost-motion connection as to be simultaneously shiftable in one direction upon storage reservoir pressure acting on one valve member reaching a chosen cut-out pressure until the other valve member begins to open a communication whereupon this other valve member is subject to pump discharge pressure to cause it to be quickly shifted relative to the one valve member to a pump unloading position in which the pump discharge is returned to a sump.

Abstract: This invention relates to a replaceable plastic wear member which is disposed within the center bowl of a railway vehicle truck bolster and interposed between the bottom of the center bowl and a vehicle body bolster center plate that extends from the bottom of the body into the center bowl in abutting relation with the upper side of the wear member, the purpose of which member is to prevent wear of the bottom of the center bowl by the relative movement between the car body and the truck bolster.