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| Number | Title | Issue Date |
| 7394553 | Integrated measurement device An integrated measurement device for taking gauge and cross-level measurements between two objects. The integrated measurement device includes at least an emitter/receiver unit, a sensor unit, and a microprocessor. In operation, the integrated measurement device is ... | 07/01/2008 |
| 7052525 | Vehicle integrated protective system A protective system having an upstream detection subsystem to detect a contaminant in an airflow and to provide a contaminant signal, an upstream detection subsystem, a filtration subsystem to filter the contaminant from the airflow, a valve adapted to allow selecti... | 05/30/2006 |
| 6725782 | Railroad test vehicle comprising a railroad measurement axle suspension A railroad test vehicle extending in a longitudinal direction comprises a measurement axle comprising two flanged wheels rotatable about a measuring axis extending transversely to the longitudinal direction and adapted to run on two track rails. A cross member exten... | 04/27/2004 |
| 6634112 | Method and apparatus for track geometry measurement A method and apparatus for measuring the geometry of a rail for a railroad track which includes mounting first and second cameras in back to back relationship to create a single camera axis passing through the camera lenses and to define a coordinate syst... | 10/21/2003 |
| 6525658 | Method and device for event detection utilizing data from a multiplicity of sensor sources A method and apparatus for event detection utilizing data from a multiplicity of sensors is provided. In a first step, actual detections from a plurality of sensors identified with predetermined sensor sequences, each indicative of an event, are compared ... | 02/25/2003 |
| 6405141 | Dynamic track stiffness measurement system and method A method and apparatus for dynamically measuring a railroad track condition using a railroad truck with metal track engaging wheels as a reference platform from which a line of sight reference plane spaced from the track is created. Measurements are succe... | 06/11/2002 |
| 6370481 | Apparatus and method for human presence detection in vehicles An apparatus and method for human presence detection in vehicles where a vehicle vibration sensor is provided to sense vehicle vibration. This vibration signal is processed to obtain a measure of vehicle vibration independent of vehicle damping. Also, a s... | 04/09/2002 |
| 6236709 | Continuous high speed tomographic imaging system and method The continuous, high speed, tomographic imaging system moves a closed package containing concealed objects continuously along a conveyor belt past three spaced sensing stations. At each sensing station a plurality of X-ray sources each emit a fan beam in ... | 05/22/2001 |
| 5791063 | Automated track location identification using measured track data A method and apparatus is provided for accurately locating a train or a track repair vehicle along the track, or to locate accurately a track defect. When measuring track geometry, i.e. gage, cross level, warp, the measuring device moves foot by foot alon... | 08/11/1998 |
| 5452222 | Fast-risetime magnetically coupled current injector and methods for using same An electromagnetic test system induces large current pulses in a component of a system under test. The pulse waveform may be selectively varied, and possible waveforms include square wave pulse, double exponential, and damped sinusoid waveforms. In a pref... | 09/19/1995 |
| 5036594 | Method and apparatus for gauging the corsslevel and warp of railroad tracks The crosslevel measuring adapter includes a battery-powered electronic level sensor, a processor unit, a display, and data, display and power switches mounted in a housing through which an inclination measuring bar passes. The adapter unit may be mounted ... | 08/06/1991 |
| 4602357 | Coded acoustic alarm transmitter/receiver system The coded acoustic alarm transmitter/receiver system includes a transmitter for selectively providing both an audible alarm in the audio frequency range and a silent alarm in the ultrasonic frequency range. These alarm signals may be provided by a plurali... | 07/22/1986 |
| 4602245 | General purpose modular acoustic signal generator A general purpose modular acoustic signal generator includes an outer casing unit having a plurality of disengageably connected sections and an insert unit removably positioned in that outer casing unit. The insert unit has a piezoelectric acoustic genera... | 07/22/1986 |
| 4473821 | Personal acoustic alarm system The personal acoustic alarm unit produces an audible alarm signal in the audio range to alert persons in the area of the signal transmitter. This audio alarm signal is formed by a plurality of simultaneously generated audio frequency sonic signals, each o... | 09/25/1984 |
| 4450531 | Broadcast signal recognition system and method The method for the automatic electronic recognition of a program unit broadcast by radio waves includes the formation of a plurality of reference signal segments from the program unit and the processing of such segments to obtain digitized reference signa... | 05/22/1984 |
| 4447123 | Fiber optic security system including a fiber optic seal and an electronic verifier The present invention includes a fiber optic seal (2) including a transparent seal body (4) having two spaced apart cavities (12,14,52,54) formed therein. Both ends (36,38) of a fiber optic cable (28) are respectively secured within the spaced apart cavit... | 05/08/1984 |
| 4415979 | Method and apparatus for detecting the presence of an animate body in an inanimate mobile structure The present invention provides a method and detection system for determining whether a person or other animate body is present in a vehicle by analyzing the power of the output signal from a geophone placed in contact with the vehicle structure. First an ... | 11/15/1983 |
| 4297699 | Radar drill guidance system The present invention comprises a short-pulse radar guidance tool which determines borehole-to-roof and borehole-to-floor distances along a coal seam by measuring the travel times of electromagnetic pulses transmitted from the tool and reflected back to a... | 10/27/1981 |
| 4218678 | Synthetic pulse radar including a microprocessor based controller This invention relates to pulse radar detection of targets in extended media, including natural phenomena such as oil, coal and ore deposits within the earth. In particular, this invention relates to a pulse radar system employing a synthetic pulse formed... | 08/19/1980 |
| 4198164 | Proximity sensor and method and apparatus for continuously measuring rail gauge A method and apparatus for railroad track surveying for accurately determining track gauge includes a pair of electro-optical sensors which are situated completely above the rail head level. A collimated light source in each sensor projects a narrow light... | 04/15/1980 |
