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"The abolishment of pain in surgery is a chimera. It is absurd to go on seeking it...knife and pain are two words in surgery that must forever be associated in the consciousness of the patient."
Dr. Alfred Velpeau, French surgeon ; 1839
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| Number | Title | Issue Date |
| 7364123 | Self powered railway monitoring system A data gathering apparatus comprises a power generation device configured to generate power via movement of the rail. The data gathering apparatus further comprises a sensing device configured to receive power from the power generation device and to sense at least o... | 04/29/2008 |
| 5735491 | Method and apparatus for detecting an approaching train by detecting a brake system status signal An apparatus for detecting the presence of an approaching train, includes a warning indicator, a receiver for receiving a brake system status signal transmitted from an approaching train, and a relay for coupling a voltage potential to the warning indicat... | 04/07/1998 |
| 5374016 | Device for catching wheel deviations for track switches or crossing having tube mounted strain gauges for measuring sensing head displacement This invention relates to a device for determining lateral and/or vertical deviations in the path taken by a wheel at railway points or crossings. One of the aims of this invention is to provide data on the condition of such points or crossings, particula... | 12/20/1994 |
| 5265831 | Arrangement for detecting an object by means of sound conducted through a solid body and method of using such arrangement A method and apparatus for detecting an impact sound, such as a sound caused by a railroad vehicle approaching a construction location. The apparatus comprises an arrangement for detecting impact sound or vibrations with a receiver mounted at the rail, fo... | 11/30/1993 |
| 4863123 | Process and system for localizing a mobile unit which travels on a system of railroads A process for localizing a mobile unit on a railway network, with a system that includes: a sensor (R) in the form of radar having an antenna (A) which is integral to the mobile unit and that cooperates with fixed markers (RP) placed alongside the railway... | 09/05/1989 |
