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| Number | Title | Issue Date |
| 5944391 | Electronic fail safe circuit for electro-pneumatic brake control An electronic fail safe circuit ensures that if there is a microprocessor failure during a brake application, this failure does not result in a release of the brakes. This is accomplished by the fail safe circuit forcing the appropriate solenoids to the s... | 08/31/1999 |
| 5650561 | Diagnostic device for determining the pneumatic health of a bubble-type fuel measuring system An improvement on locomotive bubble-type fuel level measuring systems tests or monitors the integrity of the bubble-type pneumatic system by observing the rate of bubble formation, in addition to gauging fuel level. A bubble-type fuel level detection syst... | 07/22/1997 |
| 5570270 | Chassis and personal computer for severe environment embedded applications A computer and a chassis construction for a computer for severe environmental conditions enclosing a plurality of circuit cards and a power supply includes a sealed, airtight, watertight, metal enclosure having a plurality of integrally joined walls, a fi... | 10/29/1996 |
| 5530328 | Consist power monitor A consist power monitor provides information to the engineer of a multiple unit consist on the ability of each locomotive to provide traction power and dynamic braking. The consist power monitor is a microprocessor based device which communicates with oth... | 06/25/1996 |
| 5507457 | Train integrity detection system An improvement in an End-of-Train (EOT) monitor system allows the continuity of the brake pipe of a train to be verified. Obstructions in the brake-pipe, such as, for example, closed angle cocks, kinks, blockages, or breaks, adversely affect brake safety.... | 04/16/1996 |
| 5383717 | Brake control of helper locomotive A brake control mechanism allows the engineman in a lead locomotive to control the brakes of a helper locomotive and does not require a manual connection of the brake pipe of the train to that of the helper locomotive. The End of Train (EOT) unit is used ... | 01/24/1995 |
| 5377938 | Railroad telemetry and control systems Improvements relating to railroad telemetry and control system address problems in compatibility between HOT and EOT units, implement an automatic UDE location procedure, and automate calibration of EOT units. An improved two way protocol that allows EOT ... | 01/03/1995 |
| 5376925 | Motion and direction sensors Motion and direction sensors for end of train (EOT) telemetry equipment employ a piezoelectric film as the sensing element. The motion sensor has a mechanical design which is optimized for detecting vibration on a railroad car. The electrical circuitry of... | 12/27/1994 |
| 5374015 | Railroad telemetry and control systems Improvements relating to railroad telemetry and control system address problems in compatibility between HOT and EOT units, implement an automatic UDE location procedure, and automate calibration of EOT units. An improved two way protocol that allows EOT ... | 12/20/1994 |
| 5365550 | Initial synchronization and tracking circuits for spread spectrum receivers A direct sequence digital spread spectrum receiver acquires and maintains synchronization in a reliable, yet simple manner, even under severe multipath and interference conditions. A sliding correlator and a voltage controlled crystal oscillator (VCXO) co... | 11/15/1994 |
| 5267473 | Self powered end of train unit Power supply for an EOT unit in which an electrical generator driven by air from the train air brake pipe provides the primary power to the EOT unit. The power supply of this invention may be incorporated as part of the EOT unit or it may be supplied as a... | 12/07/1993 |
| 5235849 | Railroad coupler mount A railroad coupler mount includes a hook (20) for contacting the inside upper lip (28) of a coupler head (10) within a single coring hole (12a), a jaw member (22) which engages the rib (18) between a pair of coring holes (12a and 14a), a pad (24) for abut... | 08/17/1993 |
| 5185700 | Solid state event recorder A solid state event recorder having particular application to railroad locomotives has a plurality of interface modules to allow the collection of desired data over a period of time. Radio downloading of the data provided by a telemetry transmitter to way... | 02/09/1993 |
| 5166610 | Dual range speed indicator with acceleration display A solid state speed indicator for railroad locomotives is provided with a plurality of indications in addition to speed. These include an acceleration indicator and an overspeed indicator. In addition, the speed indicator is provided with a dual range spe... | 11/24/1992 |
| 5083274 | Railroad brake pressure recording A railroad brake pressure recorder for use with both analogue and digital break pressure manifolds monitors the signal on its analogue air brake pressure input connector. If the signal on this input exceeds a predetermined frequency, inputs are processed ... | 01/21/1992 |
| 5065321 | Solid state event recorder A solid state event recorder having particular application to railroad locomotives has a plurality of interface modules to allow the collection of desired data over a period of time. Radio downloading of the data provided by a telemetry transmitter to way... | 11/12/1991 |
| 4940292 | Rapid release valve mechanism A motor driven ball valve may be driven in two modes of operation; those modes are a normal or testing mode and an emergency mode. The ball valve, when in its full open position, has an air passage that allows for the rapid exhaust of air in the air pipe ... | 07/10/1990 |
| 4885689 | Multilingual code receivers A telemetry receiver which is capable of automatically recognizing certain incompatible code formats and correctly decoding received data from a remotely located telemetry transmitter is disclosed. The specific embodiment is an end of train receiver mount... | 12/05/1989 |
| 4876885 | Railroad coupler mount An improved railroad coupler mount (18) secures end of train signalling and monitoring equipment (40) to the coupler head (10) of the last car in a train. The coupler mount (18) is secured to the coupler head (10) by a banana shaped arm (20) which extends... | 10/31/1989 |
| 4862433 | Timer circuit for drag operation in an engineman monitoring device An improved timer circuit for engineman monitoring devices allows a "drag operation" without frequent operation of the audio/visual alarms of the monitoring devices. The circuit receives an input from an existing switch in the locomotive to select the dra... | 08/29/1989 |
| 4847170 | Battery container and adapter End of train marker light equipment (10) has been designed with a battery compartment (13) which can receive either a lead/acid battery (100), a Ni/Cd battery pack (250) or a pair of lantern batteries (350 and 352). In a first configuration, the lead/acid... | 07/11/1989 |
| 4847770 | Initial terminal tester An automated initial terminal testing system tests the air pressure and leakage of the brake pipes and the operation of brakes of railroad trains (10) in a terminal yard before trains are allowed to go on a railroad. The system includes end of train devic... | 07/11/1989 |
| 4840056 | Fuel measuring system A fuel measuring system of the bubble type is adaptable for use with a plurality of tanks of predetermined differing geometries. The system employs at least two bubbling tubes located at predetermined locations in a tank. A predetermined volume flow of ai... | 06/20/1989 |
| 4785197 | Tilt switch A gravity operated switching circuit, having particular application in end of train equipment, allows the microprocessor circuit board in the equipment to be turned off. The circuit turns the power off when the equipment is laid on its side after a predet... | 11/15/1988 |
| 4780653 | Anti-stall motor drive An anti-stall motor drive circuit for a very slow running permanent magnet d.c. motor is disclosed. The slow running speed of the motor sometimes allows an insulating film to build up between the brushes and the commutator which causes the stalled conditi... | 10/25/1988 |
| 4755803 | Air brake manifold all level reset An improved automatic train-line air brake pressure monitoring system includes circuits that emulate an automatic brake valve and cause an automatic brake manifold release whenever a four psi increase in pressure is sensed. The system includes a pressure ... | 07/05/1988 |
| 4691563 | Railroad coupler mount An improved railroad coupler mount is provided for securely mounting railroad signalling and monitoring equipment (10) on the coupler of the last railroad car of a train. The railroad coupler mount includes a banana shape member (30) which extends through... | 09/08/1987 |
| 4654629 | Vehicle marker light A marker light using an array (2) of light emitting diodes (12) in combination with lenses (3) provides a light beam of required intensity, shape and color for railroad applications. The light emitting diodes are arranged in various configurations to form... | 03/31/1987 |
| 4638237 | Battery condition indicator A battery condition indicator provides an indication of both the charge used and the life remaining in a rechargeable battery. The time of use of the battery between charges is measured to provide an indirect measure of the charge remaining. The total tim... | 01/20/1987 |
| 4599723 | Method of encoding data for serial transmission A technique for redundantly encoding data for synchronous or asynchronous serial transmission or recording and the correlative technique for decoding the serial bit stream are disclosed. The encoding technique involves making the second data string of a d... | 07/08/1986 |
| 4592217 | Marker attachment for railroad equipment An improved attaching device is provided for securely mounting railroad signalling and monitoring equipment (10, 12) on the coupler (36) of a railroad car. A package including a supporting frame (22) to which the equipment is fastened by a draw pull (16) ... | 06/03/1986 |
