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| Number | Title | Issue Date |
| 7325567 | Pneumatic retarder acutator valve The present invention pertains to an electro-pneumatic retarder control (EPRC) valve for a pneumatic retarder that controls the speed of railroad cars in a marshaling yard. The EPRC valve has a housing that generally encloses and protects its various components. The... | 02/05/2008 |
| 7140302 | Releasable skate retarder for railway cars The present invention provides a releasable skate retarder for railway cars. The retarder includes a plurality of spring packs including springs which bias shoe carrying beams toward running rails, trapping wheels of a railway car entering the retarder between the s... | 11/28/2006 |
| 6980894 | Method of managing interference during delay recovery on a train system The present invention provides methods for preventing low train voltages and managing interference, thereby improving the efficiency, reliability, and passenger comfort associated with commuter trains. An algorithm implementing neural network technology is used to p... | 12/27/2005 |
| 6951132 | Rail and train monitoring system and method A system and method for determining at least one parameter related to a train traversing on a railway track is provided. The system comprises a sensor coupled to a detection location and configured for sensing acoustic signals at the detection location on the railwa... | 10/04/2005 |
| 6681161 | Voltage control on a train system The present invention provides methods for preventing low train voltages and managing interference, thereby improving the efficiency, reliability, and passenger comfort associated with commuter trains. An algorithm implementing neural network technology i... | 01/20/2004 |
| 6546318 | Railway train control and communication system The communication and control system is for use in a railway train with at least one engine and a plurality of wagons or carriages. This system comprises first and second bi-directional transmission lines which extend along the train; a main control unit ... | 04/08/2003 |
| 6487488 | Method of determining maximum service brake reduction A method of and a system for determining a maximum brake pipe service reduction in the brake system of a train having a pneumatic brake on each car connected to a brake pipe which is controlled by a brake pipe controller. The method includes determining t... | 11/26/2002 |
| 6353780 | Grade speed control and method for railway freight vehicle A grade speed control system and method for a railway freight vehicle can include a microprocessor receiving input from, for example, the dynamic and independent brakes on the locomotive, and the brakes on each rail car. The microprocessor can store value... | 03/05/2002 |
| 6332107 | Efficient high density train operations The present invention provides methods for preventing low train voltages and managing interference, thereby improving the efficiency, reliability, and passenger comfort associated with commuter trains. An algorithm implementing neural network technology i... | 12/18/2001 |
| 6220400 | Railway car retarder A low-profile railway car retarder system comprising a fulcrum pin, an upper and a lower lever, and two braking assemblies, is disclosed. The levers are located beneath a horizontal plan drawn from the top of the rail, thereby preventing inadvertent conta... | 04/24/2001 |
| 6095618 | Segmented brake pipe train control system and related methods A train control system is for a train comprising at least first and second train segments including a brake pipe being separated between adjacent train segments. The train control system preferably comprises a first control subsystem for installation in a... | 08/01/2000 |
| 5995881 | Integrated cab signal rail navigation system The cab signal and rail navigation systems of a railway locomotive are combined to form a single integrated system capable of acting as an automatic train protection system. The train travels along a railway route equipped with a wayside signaling system ... | 11/30/1999 |
| 5680120 | Transportation safety apparatus and method A transportation safety apparatus and method for the detection of obstacles which lie off the line-of-sight or beyond the field of view of a moving vehicle entails shooting a laser beam through the air from a moving vehicle, capturing the beam and passing... | 10/21/1997 |
| 5676337 | Railway car retarder system A railway car retarder mechanism that employs linear electromagnetic induction to precisely accelerate or decelerate a railcar. The retarder mechanism includes a plurality of linear induction stators having a spaced plurality of primary inductors, a contr... | 10/14/1997 |
| 5614796 | Method for providing continuous power to electrical rail vehicle systems when rail power is interrupted A method bridges gaps in a power supply for electrical, converter-fed rail vehicles having front and rear ends with front and rear current collectors, as seen in a travel direction, for making contact with the power supply. The method includes switching a... | 03/25/1997 |
| 5474267 | Method and device for a smooth and timely deceleration or stop in automatic train control A method and device for effecting a fast but smooth deceleration or stopping of trains controlled under the automatic train control (ATC) system. Under ATC, a permitted maximum velocity is provided as an "ATC condition" to activate the brake system of the... | 12/12/1995 |
| 5331261 | Regenerative braking protection for an electrically-propelled traction vehicle In an electrical propulsion system on board a moving traction vehicle (such as a rapid transit rail car) having current collectors in contact with an energized third rail, controllable switch means is used to connect the system to the current collectors. ... | 07/19/1994 |
| 5283507 | Regenerative braking protection for an electrically-propelled traction vehicle An electric propulsion system for a traction vehicle includes a controllable power converter operable in either a propulsion or an electric braking mode in which power is withdrawn from a wayside source or returned to the source, respectively. The wayside... | 02/01/1994 |
| 4865278 | Control command system for railway vehicles A brake and/or propulsion command arrangement for railway vehicles, especially for abnormality detection of a dual brake system having a cam controller for producing ON-OFF control signals. The abnormal detection system employs a comparing circuit for comparin... | 09/12/1989 |
| 4631514 | Malfunction detection arrangement for jerk controlled brake command system A jerk controlled brake system having a malfunction detecting arrangement for suppressing a malfunction signal due to a normal difference between the jerk control circuit input brake command and the output jerk modified command signal for a time period at... | 12/23/1986 |
| 4368862 | Fail-safe magnetic sensing arrangement A fail-safe magnetic sensing arrangement including a first and a second object relatively movable in relationship to each other. The first object includes a magnetic structure having a permanent magnet and a pair of pole pieces to develop a magnetic field... | 01/18/1983 |
| 4235403 | Speed control apparatus and method for railroad car retarders An acceleration servo control system for railroad car retarders in which a computed desired instantaneous deceleration signal and a measured actual deceleration signal are compared and any resulting error signal is fed back through the servo network to ad... | 11/25/1980 |
| 4198909 | Track brake for railways The track brake is intended to limit the speed of rolling motion of a freight car according to the track gradient in a marshalling yard. A retarder installed along a braking rail comprises a number of braking tappets each having a portion which projects a... | 04/22/1980 |
| 4155526 | Railroad car wheel measuring apparatus A plurality of sensors, each generating distinct signals in response to the passage of leading and trailing edges of car wheels, are positioned along the rail at a height above the rail to detect the passage of a selected chord on the wheel tread. The dis... | 05/22/1979 |
| 4151969 | System for selectively determining the location of a railway car moving along a railway track The velocity of a railway car travelling along a particular track can be determined by measuring the distance travelled by the car during a predetermined time interval. This distance travelled is measured by determining the location of the car with respec... | 05/01/1979 |
| 4129829 | Chronograph An apparatus for measuring velocity of a bullet is shown. A portable clamping device securely holds the barrel of a gun in position during firing. A bullet fired from the gun is projected through two openings located a predetermined distance apart from th... | 12/12/1978 |
| 4125177 | Railway braking apparatus Railway braking apparatus for frictionally engaging and retarding the wheels of railroad cars which includes a series of pneumatic cylindrical operators located between two adjacent crossties along the trackway. The piston of each pneumatic cylindrical op... | 11/14/1978 |
| 3993270 | Slippery wheel detector This invention relates to a method and apparatus for determining whether or not a freight car in a classification yard can be adequately retarded, prior to it being moved to make up a freight train, by measuring whether the wheels of the freight car are t... | 11/23/1976 |
| 3992922 | Coefficient of frictional determining apparatus for railway vehicles This disclosure relates to a predictor for determining the coefficient of friction existing between the rotating wheels of moving railway vehicles and the brake shoes of a pair of brake elements prior to the humping operation in a classification. One of t... | 11/23/1976 |
