Abstract: A brake disc for an axle of a truck of a railway vehicle comprises a brake disc annular element mounted on a hub by a plurality of clamping sleeves seated in radially opposed bores in the hub and annular element. In the regions of the clamping sleeves the hub or annular element is provided with circumferentially spaced lugs which are received in circumferentially extending grooves in radial extensions on the other of the hub or annular element. Radial recesses are provided on the other of the hub or annular element between the clamping sleeves to accommodate the lugs in an axial direction when assembling the annular element upon the hub.

Abstract: A brake accelerator for drawing off air from the brake line of an air brake system for railway vehicles has a piston one side of which is subjected to air pressure in the brake line and the other side is subjected to a control pressure in an expansion chamber connected to the brake line through a throttle opening. A first valve is in a connection between the brake line and a pressure accumulation chamber connected to the atmosphere through a second throttle opening. The first valve is actuated by the first piston when the control pressure exerted on the first piston is predominant. A second valve opens subsequently to the first valve and is located in a connection leading from the expansion chamber through a throttle opening to the atmosphere. The second valve is actuated by a second piston loaded by the pressure in the pressure accumulation chamber in the direction to open the second valve against the force of a spring urging the second valve into its closed position.

Abstract: A two-pressure brake control valve for a single stage releasing indirectly acting airbrake particularly for railway vehicles has a service brake portion in which is a main control element to control a valve so as to subject a brake cylinder to the action of air from an auxiliary air reservoir in response to a decrease in pressure in the brake line per unit time below a predetermined value. An emergency brake portion has a main piston as a main control element and an auxiliary piston is mounted on this main piston. The main piston controls a second valve to further subject the brake cylinder to the action of air from an emergency brake reservoir in response to a decrease in pressure in the brake line per unit time exceeding the predetermined value. A service brake accelerator valve is actuated by the auxiliary piston in response to a variation of pressure in the brake line during a service braking operation when the main piston is in an inactive position.

Abstract: An adaptor device for the coupling of Janney and Willison couplers on railway vehicles has a body portion one side of which has a rigid configuration conforming to the configuration of a Janney coupler in the locked position and the other opposed side having a rigid configuration conforming to the configuration of a Willison coupler in the locked position. The device may also be provided with stop structures for limiting the vertical movement of the adaptor device with respect to both the Willison and Janney couplers.

Abstract: A brake shoe has a groove in a support member to receive a dove-tail guide on a brake lining to hold the brake lining on the support member. One longitudinal side of the groove is inclined to define a wedge and the other longitudinal side is straight. Springs are mounted on the support member on the straight side of the groove to extend behind and clamp the brake lining dove-tail guide. Modifications of the groove include inclined sides along only portions of the groove and springs at the straight wall portions of the groove to extend behind and clamp the dove-tail guide of the brake lining.

Abstract: An actuating cylinder for a magnetic rail brake unit on a vehicle has a piston slidable within a cylinder and the piston has an end position at the head end of the cylinder. A pair of concentric conical mating surfaces are provided on the piston and cylinder head end so as to be engageable with each other to stop the piston in the end position.

Abstract: A two-pressure brake control valve has a service brake portion which is connected to a brake line, an auxiliary reservoir,an emergency reservoir and a brake cylinder. A main piston in the service brake portion is subjected to brake line pressure on one side and on its other side is subjected to pressure in the auxiliary reservoir. An auxiliary piston which has a greater sensitivity of response than the main piston is displaceable on the main piston and has one side subjected to the brake line pressure and its other side subjected to auxiliary reservoir pressure. A release acceleration valve is connected to the brake line and has an actuator in the displacement path of the auxiliary piston so as to be actuated to an open position upon movement of the auxiliary piston in the initial phase of a brake release operation. There is also a filling valve which is actuated in response to movement of the auxiliary piston to connect the emergency reservoir to the auxiliary reservoir during the release operation.

Abstract: A disc brake for a railway vehicle has a resilient mount for a cross-member upon the ends of which are pivotally mounted brake levers having brake shoes which are engageable with a brake disc mounted on either the wheel or the axle of the railway vehicle. Attached to the cross-piece is a bushing which is supported between two trunion bearings by a bolt passing therethrough. A pair of compressible rubber sleeves are inserted into the bushing to surround the bolt and the outer ends of the sleeves are provided with flanges. A pair of clamping sleeves each having a cylindrical portion are positioned in the trunion bearings and their inner ends are provided with flanges which engage the rubber sleeve flanges.

Abstract: In a brake cylinder there is a reciprocating piston from which extends a non-rotatable sleeve surrounding a co-axial non-rotatable axially displaceable threaded shaft upon which is threaded a coupling nut. A pair of rotary couplings are provided on opposed sides of the coupling nut with the sleeve and the rotary couplings are actuable by axial displacement of the coupling nut. A stop ring is axially displaceable on the coupling nut and is supported opposite to the braking direction by a fixed stop. A spring has one end acting against the stop ring and its other end acting against an abutment on the sleeve. A second stop on the coupling nut is spaced rearwardly of the first stop a distance approximately equal to the contact stroke of the vehicle brake when the resetting device is in the inoperative position.

Abstract: In a brake cylinder there is a reciprocating piston from which extends a non-rotatable sleeve surrounding a co-axial non-rotatable axially displaceable threaded shaft upon which is threaded a coupling nut. A pair of rotary couplings are provided on opposed sides of the coupling nut with the sleeve and the rotary couplings are actuable by axial displacement of the coupling nut. A stop ring is axially displaceable on the coupling nut and is supported opposite to the braking direction by a fixed stop. A second stop on the coupling nut is spaced rearwardly of the first stop a distance approximately equal to the contact stroke of the vehicle brake when the resetting device is in the inoperative position. To provide for single acting operation, the resetting device is provided with a spring which has one end acting against the stop ring and the other end acting against an abutment on the sleeve.

Abstract: A wheel and axle assembly for railway vehicles has a pair of brake discs mounted on the axle and each brake disc comprises a hub which is force-fitted on a portion of the axle and a friction disc member mounted on the hub. Each of the hubs is axially offset with respect to the central radial plane of its respective friction disc member. The brake discs are juxtaposed in mirror-image relationship to each other with the end faces of the hubs axially remote from the respective friction disc members being substantially in contact with each other.

Abstract: A brake disc for disc brakes on rail vehicles comprises an intermediate member connected to the inner peripheral surface of an annular element. The intermediate member is spaced radially from a hub and there are a pair of radially opposed annular grooves in the hub and intermediate member with blocks of resilient material in the opposed grooves. The blocks are pre-stressed and completely occupy the widths of the grooves. Heat inhibiting material is provided for inhibiting heat flow from the annular braking element to the resilient blocks.

Abstract: A hand brake for manually actuating brake cylinders, particularly for an air braking system on railway vehicles, has a piston tube extending from the piston of a brake cylinder and an actuating rod connected to the brake linkage positioned within the piston tube. A device for adjusting the actuating rod with respect to the piston tube device comprises a thrust ring acting upon a portion of the piston tube. A brake ring is positioned around the piston tube and is rotatable by a manually actuated drive. Wedge gear displacing means are provided to displace axially the brake ring upon rotation of the brake ring. An intermediate element is connected to the piston tube and is displaced by the brake ring during axial displacement of the brake ring. The piston tube has a cam portion acting upon the thrust ring so as to displace the actuating rod axially upon axial displacement of the piston tube.

Abstract: In a railway vehicle having two brake discs on the axle of a wheel and axle assembly a disc brake comprises brake shoes on opposite faces of each brake disc and the brake shoes being suspended from the bogie frame. For each brake disc there is a pair of brake levers pivotally connected by pull-rod means with the inner ends of the brake levers being pivotally connected to the brake shoes. One of the remote ends of the outer brake levers is pivotally connected to a displaceably supported brake cylinder and the remote end of the other outer brake lever is pivotally connected to a piston rod extending from the brake cylinder. The remote ends of the two central brake levers are both pivotally connected to fixed points.

Abstract: A brake disc for railway vehicle disc brakes that can be operated in both directions of rotation has a friction ring traversed by radial cooling ducts formed by a plurality of ribs. A radial impeller is mounted in the space radially inwardly of the friction ring and the impeller has an axial intake and a radial outlet directed toward the cooling air ducts. A plurality of radially oriented blades are provided on the impeller between the intake and outlet.

Abstract: An uncoupling device for a central buffer coupling on a railroad vehicle comprises an operating mechanism which has one end pivotally mounted adjacent the tracks on which the vehicle is positioned and on the other end is provided with an uncoupling hook which is engageable with the uncoupling lever pivotally mounted on the railway vehicle. The operating mechanism is moved between inoperative and engaging positions by a drive which is actuated by a switch responsive to the engaging of the uncoupling lever with the hook on the operating mechanism.

Abstract: A rail brake magnet unit on a vehicle comprising separate rail brake magnets or a plurality of rail brake magnets connected together by a frame is vertically movable between a lowered operative position and a raised inoperative position. On approximately the four corners of the upper portion of the magnet unit there are provided inclined slide surfaces each of which engages a plane surface of a corresponding number of resilient buffers mounted on the vehicle structure when the rail brake magnet unit is in its raised inoperative position.

Abstract: A brake disc for disc brakes for vehicles comprises a brake disc annular element mounted on a hub. The annular element and hub are interconnected by a plurality of clamping sleeves seated in radially opposed bores in the hub and annular element. Each clamping sleeve comprises two sleeves disposed co-axially one within the other and each sleeve has an axially directed slot therein with the slots being offset 180.degree..

Abstract: A disk brake for a railway vehicle is provided with a resilient pivot mount for a cross member upon the ends of which are pivotally mounted the brake levers having brake shoes which are engageable with a brake disk on either the wheel or axle of the railway vehicle. The cross piece has a bushing which is supported between two trunion bearings by a bolt passing therethrough. A pair of tapering compressible rubber sleeves are inserted into each end of the bushing to surround the bolt and the outer ends of the rubber sleeves are engaged by flanges on the ends of metal sleeves which are axially displaceable upon the bolt within the trunion bearings. The inner ends of the rubber sleeves are spaced from each other so that tightening of the bolt will press the ends of the sleeves together.

Abstract: A brake disk comprising a pair of spaced friction disks against which a brake lining on a brake shoe can be applied to produce a braking effect are interconnected by a plurality of ribs and guide vanes so as to define ventilation passages between the friction disks. Strips of vibration damping material are positioned in radial grooves formed in the mutually facing surfaces of the friction disks. The inserts comprise a metal which damps vibrations and has a coefficient of expansion greater than that of the iron material from which the friction disks are formed and may comprise such metals as lead, bronze or copper.