Abstract: A method of polishing and coloring concrete surfaces using a dry concrete grinding process which includes locking in dye colors by applying the dye to the cementicious surface mid way during a series of grinding steps using sequentially finer grit, and then applying a sealer after the dye has dried and continuing the grinding process with sequentially finer polishing grits after the sealer has dried and hardened. A second coat of sealer is then applied at the end of the grinding process. In a presently preferred embodiment, the dye is applied after grinding with a grit of substantially 400 grit, the sealer is applied after the dye is dry and grinding is continued up to about 3000 grit after the first coat of sealer dries. Lastly, a second coat of sealer is applied.

Abstract: A dry method of concrete floor or concrete surface restoration uses the process of grinding a concrete surface to be resurfaced while extracting and retaining dust during the grinding process. The grinding process is repeated each time using finer grinding grit until a preselected degree of smoothness of the concrete surface is achieved. A sealer is applied to the concrete surface which has been ground to the predetermined degree of smoothness. In a preferred embodiment, two coats of sealer are applied and the sealer is preferably a water-based, odorless, penetrating alkaline siliconate solution. The method of the present invention limits down time to aisles and main areas during the restoration process, as well as limiting the dust and odor during the process to provide a lustrous smooth surface on the concrete.

Abstract: A train control system includes a plurality of control subsystems for installation in respective locomotives. At least one of the control subsystems is configurable as a lead control subsystem, and at least one other control subsystem is configurable as a remote control subsystem. Each control subsystem preferably comprises a radio transceiver, a first processor connected to the radio transceiver for communicating with at least one other control subsystem, an electronic brake valve connected to the first processor, and an electro-pneumatic controller connected to the first processor and the electronic brake valve, for interfacing to the air brake system of the train. The first processor preferably comprises a locomotive computer interface for performing both distributed power and electronic air brake functions in cooperation with the locomotive control computer. The distributed power functions may comprise at least one of tractive effort and dynamic braking functions.

Abstract: A computerized locomotive control system receives as inputs electrical signals representing automatic and independent braking control signals from controllers and pipe pressures and has a computer for determining, from said input signals, electrical signals representing desired braking and pipe pressures. The computer in the lead locomotive uses the independent application and brake pipe pressure to control the brake cylinder pressure except where the independent application and release brake pipe has been tested as a fault or during the initial buildup of the independent application brake pipe. In this instance, independent application and release controller position is used to control the brake cylinder pressure.

Abstract: A computerized locomotive control system receiving as inputs electrical signals representing automatic and independent braking control signals and a computer for determining, from said input signals, electrical signals representing desired equalization reservoir pressure, desired independent application and release pressure and desired actuating pressure. Electro-pneumatic valves controls the pressure in the equalization reservoir, on the independent application and release pipe and as the actuating pipe in response to the desired pressure signals. A electro-pneumatic valve for the control reservoir of the locomotive brake is controlled by the computer in response to pipe pressures. The computer provides penalties and interlocks electrically.

Abstract: A computerized locomotive control system receiving as inputs electrical signals representing automatic and independent braking control signals and a computer for determining, from said input signals, electrical signals representing desired equalization reservoir pressure, desired independent application and release pressure and desired actuating pressure. Electro-pneumatic valves controls the pressure in the equalization reservoir, on the independent application and release pipe and as the actuating pipe in response to the desired pressure signals. A electro-pneumatic valve for the control reservoir of the locomotive brake is controlled by the computer in response to pipe pressures. The computer provides penalties and interlocks electrically.

Abstract: A computerized locomotive control system receiving as inputs electrical signals representing automatic and independent braking control signals and a computer for determining, from said input signals, electrical signals representing desired equalization reservoir pressure, desired independent application and release pressure and desired actuating pressure. Electro-pneumatic valves controls the pressure in the equalization reservoir, on the independent application and release pipe and as the actuating pipe in response to the desired pressure signals. A electro-pneumatic valve for the control reservoir of the locomotive brake is controlled by the computer in response to pipe pressures. The computer provides penalties and interlocks electrically.

Abstract: A computerized locomotive control system receiving as inputs electrical signals representing automatic and independent braking control signals and a computer for determining, from said input signals, electrical signals representing desired equalization reservoir pressure, desired independent application and release pressure and desired actuating pressure. Electro-pneumatic valves controls the pressure in the equalization reservoir, on the independent application and release pipe and as the actuating pipe in response to the desired pressure signals. An electro-pneumatic valve for the control reservoir of the locomotive brake is controlled by the computer in response to pipe pressures. The computer provides penalties and interlocks electrically.

Abstract: A computerized brake control system which calculates desired brake pressure from commanded brake signal, vehicle weight, vehicle speed and dynamic braking, compares the desired brake pressure with the actual brake, and controls the fluid brake system to cause the actual brake pressure to be substantially equal to the desired brake pressure. For snow brake mode the computer sets a fixed value of desired brake pressure which is used for controlling the fluid brake system. After a fixed number of stops, the brake mode is temporarily disabled.

Abstract: A microprocessor controlled wheel slip system for a train of railway cars receives wheel speed data, calibrates that data in accordance with a predetermined set of instructions, and indicates when a pair of wheels on an axle of a given car is slipping or spinning relative to the other wheels on the other cars of the train.