Abstract: Release valve apparatus capable of being actuated by the vacuum that can be created in a main air line (1) for indirect air brakes of rail vehicles, comprising a release valve (12) in a connection (pipes 8, 9) from the brake control valve (3) to the brake cylinder (10). The release valve (12) contains a piston controlled two-way valve (24, 27, 28), which unblocks the passage in the off position of the release valve (12). In the actuated position, on the other hand, it blocks passage and vents the connecting segment (pipe 9) on the brake cylinder side. The piston (13) of the release valve (12) is loaded in the off position operating on a smaller piston area by main air line pressure, and by opposing pressure in an admission area (15) which is under atmospheric pressure in the off position and during the switching process to the operating position, and in this position is impacted by pressure in the connecting segment (pipe 8) leading to the brake control valve (3).

Abstract: An anti-lock device for the brakes of vehicles, particularly rail vehicles, regulates the applied braking force. An evaluation circuit monitors the speed, acceleration and slip of at least one braked wheel and in response to the rotational behavior of the wheel generates instructions for the brake actuating element. The evaluation circuit maintains the brake pressure constant during the initial phase upon the first application of brakes until the wheel acceleration falls below a predetermined negative threshold value. The initial phase is terminated when the wheel acceleration falls below a further predetermined reference value which is lower than the first threshold value. Upon termination of the initial phase, the brake pressure is again varied in a manner as known in the art.

Abstract: A service brake accelerator having a line chamber (3) connected to the main air supply line (1) and a reference pressure chamber (6) connected to the line chamber via a nozzle (7). The line chamber is separated from the reference pressure chamber by a diaphragm piston (5) which is biased by a spring (10) against a valve seat (9) projecting into the reference pressure chamber and restricting a nozzle opening (23) to the inner chamber (24) of a second valve seat (20). A second diaphragm piston (17) is biased against this second valve seat by a spring (21). The space (16) surrounding the second valve seat can be connected, partly throttled, via a nozzle (14), to the line chamber by way of a shut-off valve (12, 13) which opens laterally of the reference pressure chamber upon overbalancing pressure upon the first diaphragm piston; this space is always open to atmosphere via a further nozzle (25). The accelerator operates cyclically and has a safe, stable neutral position between its work cycles and rest position.

Abstract: The device automatically adjusts the slack in the brake linkage of railway vehicle during the braking process and has two telescoping rod members one of which is connected with a brake motor and the other is connected to the brake linkage. A nut, nonrotateably mounted on the brake linkage rod member, is threaded upon a rotateable spindle shaft which is axially moveable a limited distance within the brake motor rod member and is connected to this rod member by a control clutch. When the control clutch is stressed by torque, the control clutch member will become disengaged from the brake motor rod member to permit a relative adjustment between the two rod members to overcome any slack. When slack is overcome, a rotary clutch between the threaded spindle and the brake motor rod member will be engaged so that braking force can be transmitted between the rod members.

Abstract: An anti-lock device for vehicle brakes has a wheel generator which emits pulse-type signals whose frequency is proportional to the rotary speed of the wheel. A counter counts the pulses emitted during each of successive time intervals and these pulses are connected to a first memory which stores the count of the immediate preceding time interval and to a second memory which stores the count of the time interval next preceding the intermediate time interval. A logic circuit then produces a wheel speed value which is based on the wheel speed counts of the immediate preceding and next preceding time intervals.

Abstract: An actuator for an air valve placed in the boost air duct of an IC engine and, more specially, of such an engine supercharged or boosted by a pressure wave supercharger, the air valve being in its closed position on starting up the IC engine from cold, at which time the engine takes in charge air by way of a breather valve, and at the end of the starting stage the valve in the boost air duct is moved into its open position and is kept open while the engine is running. After shutting down the engine, the valve in the intake pipe is automatically moved back into its closed position and the air valve is moved into its open position by the pressure of the air forced into the boost air duct and/or by vacuum against an air valve spring closing force.

Abstract: A braking apparatus for rail vehicles has a brake actuating unit to one side of the vehicle wheel. A pair of brake shoes oppositely disposed on both sides of the wheel can be pressed against the contact surface of the wheel. A first vertical braking lever is pivotable under a force from the brake actuating unit with respect to the contact force exerted by the first brake shoe. A second vertical braking lever is similarly connected to the other brake shoe. The lower ends of both braking levers are pivotally connected with two traverse members each interconnecting the ends of two parallel tie rods which extent horizontally across both faces of the vehicle wheel. The play or clearance in the application of the brake shoes to the wheel contact surface is automatically adjusted by a self-actuating device in each tie rod. Each adjusting device comprises a screw coupling consisting of a nut threaded on a spindle shaft.

Abstract: A brake unit for automatically adjusting slack between the brake surfaces of a railway brake has a pre-stressed spring which is released during the initial stroke of the brake piston in a braking application so as to expedite contact of the brake surfaces. After slack has been overcome, further movement of the piston in the braking direction will cause the force-transmitting components to be coupled together so that braking force is transmitted directly to the brake surfaces by subsequent movement of the piston in the braking direction. The release of the pre-stressed spring during the overcoming of slack in the brake rigging will increase the speed of the brake application with respect to the speed of the braking piston.

Abstract: A transmission shiftable to change transmission ratios by the operation of a member whose effectiveness depends upon a pressure fluid, e.g. through a valve communicating the fluid to actuators of the gear-change system, has a clutch connecting the output shaft of a prime mover as an internal-combustion engine with the input shaft of the transmission. According to the invention, the clutch-operating cylinder is connected by an entraining device with a valve controlling the pressure fluid. A lost motion may be provided between the operating member of the cylinder and the valve seats to ensure full opening of the clutch before operation of the transmission is enabled.

Abstract: A sanding apparatus for a vehicle, particularly rail vehicles, has a sealed container for sand and the container is provided with a bottom wall which is permeable by air. A sand discharge pipe extends from the container through the bottom wall and has an end position in front of a vehicle wheel. An air supply line extends from a source of air under pressure and opens into a chamber underneath the bottom wall of the container. An exhaust air line has one end within the container above the level of sand when the container is full and has its other end connected to the sand discharge pipe. The flows of air through the air supply line and the exhaust air line are so controlled that at a predetermined pressure of supplied air a remaining portion of the supplied air flows through the sand discharge pipe at a rate to discharge a predetermined quantity of sand per unit time from the sand discharge pipe. Various structures are provided for regulating these flows of air.

Abstract: A pressure medium controlling valve has a valve member with an annular groove being formed in the surface of the valve member directed toward a valve seat. A resilient sealing ring is disposed within the annular groove and is opposed from the valve seat. The side of the annular groove facing toward the pressure medium is cylindrical and is engaged by the end of a resilient sealing lip attached to the outer peripheral surface of the sealing ring. The sealing lip extends angularly outwardly away from the sealing ring and toward the surface of the valve member directed toward the valve seat so that the outer end of sealing lip abuts resiliently against the cylindrical surface of the groove to form a seal therewith. The other side of the annular groove is provided with an undercut which receives a correspondingly shaped portion of the sealing ring.

Abstract: A brake disk for a disk brake mounted on either the axle or wheel of a rail vehicle has on its inner peripheral portion a flange ring provided with parallel annular surfaces which are inclined to a central plane of the disk brake. These inclined surfaces are clamped between an inclined surface on a hub and an inclined surface on a retaining ring. The retainer ring is closely positioned upon the hub but in such a manner that any thermal expansion of the brake disk will enable the flange ring to move unhindered in an oblique radial outward direction while at the same time maintaining the brake disk locked and centered without overstressing the fastening bolts which pass through the hub portion and the retainer ring.

Abstract: A brake disk particularly for railway vehicles has a brake disk annular element mounted on a hub by at least three radially extending adaptor sleeves seated in radially opposed bores in the hub and annular element. A conical member within an end portion of the adaptor sleeve can be moved inwardly by tightening a bolt passing through the adaptor sleeve so as to expand radially the end portion of the sleeve against the wall surface of its respective bore.

Abstract: A spring-loaded braking cylinder has a rapid release mechanism which disengageably connects the spring-loaded piston with the piston rod. A damping mechanism damps the relative movement between the piston and the piston rod which occurs upon release of the coupling between the spring-loaded piston and the piston rod. The piston rod is coupled to the piston by a transverse pin a portion of which projects into a transverse slot on the piston rod and another portion of which is movable within an L-shaped slot on the piston rod. An adaptor connected to the pin has a flange which acts as a piston within a closed chamber formed with the piston rod and filled with fluid. The spaces on both sides of the piston-like flange are interconnected by throttle passages.

Abstract: A brake disc for an axle of a railway vehicle comprises a friction disc annular element mounted concentrically on a hub by a plurality of clamping sleeves or bolts seated in radially opposed bores in the hub and annular element. A pretensioned resilient retaining member exerts a radially inwardly directed force against the radial outer end of each clamping sleeve or bolt. The retaining member is positioned against stop surfaces disposed radially outwardly of the outer end of the cylindrical or bolt element and formed on the ribs which interconnect a pair of axially spaced friction elements constituting the annular element or on the inner surfaces of the friction elements.

Abstract: A brake lining support member for disk brakes for railway vehicles and the like has an insertable brake lining retained in position by a locking bar at least one end of which is secured by a U-shaped spring clip having parallel legs one of which is mounted in a bracket on the brake lining holder and the other leg mounted in the locking bar.

Abstract: In an electropneumatic brake a relay valve is connected between a source of pressure fluid and a brake cylinder which may be spring-loaded or direct acting in order to regulate the pressure in the brake cylinder. An emergency brake valve is connected to a means for producing a brake signal to shut off a faulty brake signal and actuated in the absence of a vehicle load responsive signal. A pressure control valve is connected to the emergency brake valve, to relay valve and to a device for producing a vehicle load-responsive signal in order to control a load-responsive pressure in the brake cylinder in such a manner that in the absence of a vehicle load-responsive signal and upon actuation of the emergency brake valve full braking is applied by the brake cylinder independent of the vehicle load.

Abstract: A braking apparatus for vehicles has a switching device which controls the admission of pressure fluid to the braking cylinder of a service brake and is operated by a reaction force acting upon a coupling or bearing support between the switching device and a lever operatively connected to a parking or locking brake. When this reaction force exceeds a predetermined limit upon operation of the parking brake, the switching device is actuated to release the service brake. The service brake is released at that time when the parking brake already applies a braking force and the short period of time between the parking brake being locked and prior to release of the service brake is so short that the brake linkage of the service brake is not subjected to any damaging effects.

Abstract: A pressure regulator has at least one solenoid valve operated by electrical signals connected to a container the actual pressure of which is indicated by a pressure electric transducer. A comparator generates a regulation signal which is the difference between the actual pressure and a command pressure signal. A regulator is connected to the comparator for generating a control signal to the solenoid valve in such a manner that the valve member of the solenoid valve is adjustable in a stable manner between intermediate positions within a range between the open and closed positions of the valve such that throttled pressure media continuously flows through the valve. The valve adjustment signal can be a continuously variable direct voltage which is proportional to the output signal of the regulator and may be a rectangular or saw-toothed voltage with a frequency exceeding the maximum actuating frequency of the solenoid valve.

Abstract: A brake cylinder has a piston one side of which is spring-loaded and the other side of which is acted upon by a fluid pressure medium. A spindle shaft is coupled t the cylinder by a screw coupling having a non-self-locking thread and is engageable with an actuating rod which is adapted to be connected to the brake linkage. A sleeve is rotatably mounted on the cylinder but is non-axially movable with respect to the cylinder. The sleeve is axially but non-rotatably slideable with respect to the spindle shaft. An overrunning drive is operatively connected between the sleeve and a drive mechanism which is operable exteriorly of the brake cylinder. The drive locks in the driving position when the sleeve rotates in a direction to unscrew the spindle shaft from the piston in the direction to release the brake.