Abstract: An electro-pneumatic control system for effecting coupling and uncoupling action of automatic rapid transit type car couplers in a manner which assures that fluid pressure lines are cut off and that electrical contacts are disconnected before actual physical disengagement of the couplers themselves can occur.

Abstract: An automatic drain valve device alternatively adaptable for use in compressor systems using either electrical or pneumatic controls for cutting out and cutting in the compressor, and being operable to provide a drain operation twice during each cycle of compressor operation, that is, once when the compressor is cut out and again when the compressor is cut in. A manually operable lever on the valve devices provides for manual operation of the drain valve device at will and independently of the pneumatic and electrical controls.

Abstract: A fluid pressure cut-off safety device interposable in a fluid pressure supply pipe and operable responsively to a reduction of fluid pressure in the supply pipe to a predetermined degree for automatically cutting off communication through the supply pipe until such communication is restored by manual resetting of the device.

Abstract: A vehicle load force proportioning device compressibly interposable between a sprung portion and an unsprung portion of a vehicle and subjectable to a compressive force of a degree corresponding to the vehicle load, the proportioning device including a pair of axially aligned force-translating piston members having respective pressure areas of different dimensions and having an elastomeric member disposed therebetween for transferring the vehicle load force from one of the piston members to the other and converting the vehicle load force to an operating force for causing a control valve device to emit a control impulse at a degree according to that of the operating force which, relative to the vehicle load force, is either proportionally reduced or amplified depending upon the respective dispositions of the different dimension piston members in the proportioning device relative to the sprung and unsprung portions of the vehicle.

Abstract: Fluid pressure operable brake apparatus for controlling the ratio of braking forces exerted on two rear tandem axles of a vehicle, including a driving axle and a trailing axle, in such manner as to provide compatible synchronous braking effort by taking into account dynamic axle load displacement during braking action and including a stepped-piston relay valve responsive to load conditions of the vehicle for adjusting the ratio of braking forces between the driving axle and the trailing axle accordingly.

Abstract: An emergency brake valve device, especially for rapid transit railway vehicles, in which a vent valve for propogating transmission of an emergency rate reduction of brake pipe pressure is opened by direct engagement thereof by a brake pipe pressure reduction rate sensitive piston subjected unrestrictedly to brake pipe pressure on one side and to control brake pipe pressure communicated to the opposite side via a choke. A magnet valve device connected to brake pipe pressure on the one side of the rate sensitive piston provides for electrically initiating reduction of the brake pipe at an emergency rate and, consequently, an emergency brake application.

Abstract: A fluid pressure operable servo positioner for selectively positioning a mechanical member or lever by a power cylinder selectively positionable in accordance with the degree of operating fluid pressure supplied thereto through a control valve device at a pressure determined by the degree of a selectively variable control pressure supplied to the control valve device, the power cylinder including a counteracting spring for balancing the force of the operating pressure to maintain the power cylinder in the selected position and a cam member engaging the control valve device and positionable according to the position of the power cylinder for maintaining the control valve device in the selected pressure supply position.

Abstract: A railway vehicle fluid pressure operable emergency vent valve responsive to a reduction of brake pipe pressure at a rate in excess of a certain rate, or at an emergency rate, for unrestrictedly venting the brake pipe to atmosphere and thus propagating an emergency brake application, but also sensitive and operable responsively to a reduction of brake pipe pressure, irrespective of rate or at a normally undetectable rate, to a value insufficient for effective brake control, for initiating an emergency brake application.

Abstract: A brake cylinder device including a conventional release piston spring-biased toward a full-application or emergency application position and operable responsively to fluid pressure applied thereto in opposing relation to the spring force acting thereon, to a brake release position, a conventional service application piston, both pistons being subjectable concurrently to fluid pressure for operating the release piston to its release position and the service piston to a service brake application position in accordance with the degree of fluid pressure acting thereon, and a locking mechanism for automatically locking the release piston in its release position upon attainment of a full service application and thereafter during service braking operation at less than full service level and while the vehicle is in motion, and being operable for unlocking the release piston upon stopping of the vehicle and withdrawal of service braking fluid pressure.

Abstract: An improved simplified emergency brake valve device including a relay valve portion responsive to brake pipe pressure reduction at an emergency rate for actuating a logic valve portion which, in turn, when actuated, causes operation of a vent valve portion via which the brake pipe is opened to atmosphere for effecting reduction of brake pipe pressure at an emergency rate at the succeeding car in the train, thereby propogating such reduction of brake pipe pressure throughout the train for effecting an emergency brake application thereon.

Abstract: Seals for providing sealing contact between the rotary piston and the apexes of the casing of a rotary type combustion engine, compressor, or pump for sealing the several pressure chambers, one from the other or others, during operation. The seals are disposed in radially formed slots at each apex of the housing and are so constructed to permit pressure in the chamber being pressured to be communicated to the rear side of the seal, or the side opposite that which makes sealing contact with the rotary piston, so that such pressure acting on the rear side may assist the spring normally acting against the same side in forcing the seal against the rotary piston with greater pressure and thereby provide a better sealing effect.

Abstract: A visual indicator engageable and operable by a movable locking member of an automatic type railway car coupler for indicating a locked or unlocked condition of the locking member and, therefore, the coupled or uncoupled condition of the coupler, said indicator being readily visible from both sides of the coupler or train.

Abstract: Combination fluid pressure and electric operable trip cock emergency brake apparatus for use with railway vehicles including a trip cock device having a fluid pressure portion and an electrical portion, both operable concurrently, when a trip lever thereon is actuated by a trip arm located on the roadway, for providing concurrent fluid pressure and electrical pilot signals to cause operation of a common control switch which in turn, when so operated, actuates propulsion and brake control devices to cause propulsion power to be cut off and an emergency brake application to be effected concurrently. The fluid pressure and electric portions of the trip cock device complement each other to insure that one or the other, if not both, will effect the desired results in an emergency situation.

Abstract: A brake control valve device for a use with tandem or tractor-trailer type vehicles employing dual brake systems with the source of operating fluid supplied at a relatively higher pressure than that required for operating the brakes. The respective valve elements of the valve device for controlling supply and exhaust of operating pressure to and from the respective brake circuits are mechanically actuated through a manually actuated pressure graduating piston (for the first brake circuit) and a fluid pressure responsive relay piston (for the second brake circuit), the dimensions of the relay piston being limited to less than normal for conserving space, but being provided with an adjusting mechanism for adjusting the fluid pressure responsive operating range thereof for compensating for the smaller dimension and synchronizing the relative serial operation of the dual brake circuits.

Abstract: Apparatus for protecting reversible engines against damage during reversal of engine rotation notwithstanding that such reversal is initiated remotely by the operator by a single movement of the control handle without regard of the engine speed at the time such reversal is initiated, said apparatus including means for automatically cutting off engine throttle, determining the engine speed and direction of rotation at time reversal operation is initiated, and delaying, if necessary, restarting of the engine in the desired direction of rotation until rotation in the prior direction has been reduced to a safe speed for effecting such rotational reversal.