Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 7395140 | Geographic information system and method for monitoring dynamic train positions A geographic information system (GIS) displays geographic roadway data, geographic track data and geographic train position data. The GIS includes a GIS database having static roadway and track data. A computer aided dispatching (CAD) system includes a task to deter... | 07/01/2008 |
| 7258309 | Automatic and guided system for transporting people and method for controlling transport modules running in such a system A system for automatic and guided transport of people, the system including: at least one running track having guide members for guiding transport modules; an electric power supply system comprising a sequence of power supply blocks; electric self-propelled transpor... | 08/21/2007 |
| 7099754 | Signal safety method, signal safety apparatus and signal safety system In order to propose a method of promptly judging movement of a train between block sections with a minimum number of transponders, an on-ground train control part for controlling operation of a train; an on-ground communication means capable of performing communicat... | 08/29/2006 |
| 7036774 | Method and system for checking track integrity A train control system includes a control module that determines a position of a train using a positioning system and consults a database to determine when the train is approaching a portion of track monitored by a track circuit. When the train is near a track circu... | 05/02/2006 |
| 6845953 | Method and system for checking track integrity A train control system includes a control module that determines a position of a train using a positioning system and consults a database to determine when the train is approaching a portion of track monitored by a track circuit. When the train is near a track circu... | 01/25/2005 |
| 6827315 | Method and system for preventing overfilling of a track system The invention relates to a decision procedure in combinational logic which requires a computing time of n for determining the congestion of a railway track system. The railway track system supports n trains, each with a route length of m itineraries. Prior to settin... | 12/07/2004 |
| 6766988 | Block occupancy detector for model railroads A system and method for detecting the presence or absence of cars, locomotives, or obstructions which may occupy a particular section of track of a model railroad. Digital Command Control signals are used to provide the excitation voltage needed to perform a measure... | 07/27/2004 |
| 6195023 | Communication based vehicle positioning reference system A communication based vehicle positioning reference system that includes a vehicle path. The vehicle path is divided into regions, wherein the regions contain a portion of the vehicle path. Each portion of the vehicle path contained within a respective re... | 02/27/2001 |
| 4932615 | Railroad track simulator for assessing track signal susceptibility to electric power line interference A railroad track segment simulator for assessing track signal susceptibility to electric power line interference including a circuit including a series dc resistor, a series inductor, and an inductive network representing characteristic impedance of an el... | 06/12/1990 |
| 4858859 | Control systems for controlling the passage of vehicles An improved control system is described for controlling the passage of a vehicle between certain control points, the control is achieved by passing electronic tokens, which permit movement of the vehicle past a control point, between a signal box and the ... | 08/22/1989 |
