Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 8115622 | Underground radio communications and personnel tracking system An underground radio communications and personnel tracking system uses a portable communications device worn by a miner when underground in a mine. A cap-lamp transceiver provides voice and text communication on ultra-low frequency (ULF) to ultra-high frequency (UHF... | 02/14/2012 |
| 8072367 | Organically reactive cell for underground sensing (ORCUS) and system A movement detection system includes a microwave antenna able to transmit microwave frequency signals into a space. An electronics controller is connected to the microwave antenna, and is configured to continually measure the impedance of the microwave antenna while... | 12/06/2011 |
| 7755235 | Downhole generator for drillstring instruments A downhole generator comprises a turbine coaxially disposed inside a section of drillstring and that will be spun when hydraulic or pneumatic flows are pushed through to a drillbit motor on a distal end. The turbine, in turn, spins permanent magnets in an orbit arou... | 07/13/2010 |
| 7675289 | Underground anomalies detection vehicle and trailer A system for detection of linear underground anomalies passing under surface roads comprises an electromagnetic (EM) gradiometer mounted on a vehicle trailer. A transmitter is mounted to the front bumper of a car or vehicle towing the trailer and provides carrier sy... | 03/09/2010 |
| 7659847 | Radar mining guidance control system A coal-mining machine uses a ground-penetrating radar based on a software-definable transmitter for launching pairs of widely separated and coherent continuous waves. Each pair is separated by a constant or variable different amount double-sideband suppressed carrie... | 02/09/2010 |
| 7656342 | Double-sideband suppressed-carrier radar to null near-field reflections from a first interface between media layers A ground-penetrating radar comprises a software-definable transmitter for launching pairs of widely separated and coherent continuous waves. Each pair is separated by a constant or variable different amount double-sideband suppressed carrier modulation such as 10 MH... | 02/02/2010 |
| 7548181 | Earth-penetrating radar with inherent near-field rejection A ground-penetrating radar comprises a transmitter for launching pairs of widely separated and coherent continuous waves. Each pair is separated by a different amount, such as 10 MHz, 20 MHz, and 30 MHz. These are equivalent to modulation that have a phase range tha... | 06/16/2009 |
| 5769503 | Method and apparatus for a rotating cutting drum or arm mounted with paired opposite circular polarity antennas and resonant microstrip patch transceiver for measuring coal, trona and potash layers forward, side and around a continuous mining machine For use in explosive atmospheres during mining, an flame proof or explosion proof internal AC alternator is provided to source electrical power from the rotations of a cutting head. A synthetic-pulse stepped-frequency ground-penetrating radar is used with... | 06/23/1998 |
| 5686841 | Apparatus and method for the detection and measurement of liquid water and ice layers on the surfaces of solid materials An embodiment of the present invention is a roadway sensor for surface installation in a hole such that a thin ceramic contact sensor may be used to measure and cross-compare fundamental physical antenna parameters of the space immediately above a roadway... | 11/11/1997 |
| 5301082 | Current limiter circuit A method for using an underground mine communication system to effect minewide communication and an intrinsically safe current limiter circuit for insuring that electrical equipment in the system will not cause incendiary conditions. The underground mine ... | 04/05/1994 |
| 5268683 | Method of transmitting data from a drillhead A method for remotely monitoring conditions such as carbon monoxide or methane gas concentration, longwall roof support pressure, machine parameters or uncut coal, trona or potash layer thickness in a natural resource mining system such as a longwall or c... | 12/07/1993 |
| 5260660 | Method for calibrating a downhole receiver used in electromagnetic instrumentation for detecting an underground conductor A method utilized with an underground conductor detection system for calibrating a downhole transmitter to compensate for detuning of the transmitter antenna by geologic formations. The method comprises sending a synchronization signal to the transmitter ... | 11/09/1993 |
| 5188426 | Method for controlling the thickness of a layer of material in a seam A method for determining the thickness of a layer of material, such as soil, wood, ice or coal, that utilizes a microstrip antenna as a thickness measuring sensor. The sensor is positioned over the layer and a value for a parameter of the antenna such as ... | 02/23/1993 |
| 5185578 | Method for detecting anomalous geological zones by transmitting electromagnetic energy between spaced drillholes using different frequency ranges A method utilized with an underground conductor detection system for calibrating a downhole transmitter to compensate for detuning of the transmitter antenna by geologic formations. The method comprises sending a synchronization signal to the transmitter ... | 02/09/1993 |
| 5181934 | Method for automatically adjusting the cutting drum position of a resource cutting machine A method for remotely monitoring conditions such as carbon monoxide or methane gas concentration, longwall roof support pressure, machine parameters or uncut coal, trona or potash layer thickness in a natural resource mining system such as a longwall or c... | 01/26/1993 |
| 5181879 | Method and apparatus for processing fish into transverse sections An apparatus for processing a fish body into a plurality of transverse fish body section includes a plurality of spaced apart vertically standing work stations, each including a structural frame that supports a continuous rail or runway. The runway includ... | 01/26/1993 |
| 5146611 | Mine communication cable and method for use A mine emergency communication cable and a method for use. The cable is comprised of a plurality of brightly colored, lightweight, strong synthetic fibers having a plurality of noninsulated tin plated copper wires and stainless steel wires at least one in... | 09/08/1992 |
| 5121971 | Method of measuring uncut coal rib thickness in a mine A method for remotely monitoring conditions such as carbon monoxide or methane gas concentration, longwall roof support pressure, machine parameters or uncut coal, trona or potash layer thickness in a natural resource mining system such as a longwall or c... | 06/16/1992 |
| 5093929 | Medium frequency mine communication system A method for using an underground mine communication system to effect minewide communication and an intrinsically safe current limiter circuit for insuring that electrical equipment in the system will not cause incendiary conditions. The underground mine ... | 03/03/1992 |
| 5087099 | Long range multiple point wireless control and monitoring system A method for remotely monitoring conditions such as carbon monoxide or methane gas concentration, longwall roof support pressure, machine parameters or uncut coal, trona or potash layer thickness in a natural resource mining system such as a longwall or c... | 02/11/1992 |
| 5072172 | Method and apparatus for measuring the thickness of a layer of geologic material using a microstrip antenna A method of determining the thickness of a layer of material, such as soil, wood, ice or coal, that utilizes a microstrip antenna as a thickness measuring sensor. The sensor is positioned over the layer and a value for a parameter of the antenna such as c... | 12/10/1991 |
| 5066917 | Long feature vertical or horizontal electrical conductor detection methodology using phase coherent electromagnetic instrumentation A method utilized with an underground conductor detection system for calibrating a downhole transmitter to compensate for detuning of the transmitter antenna by geologic formations. The method comprises sending a synchronization signal to the transmtter a... | 11/19/1991 |
| 4994747 | Method and apparatus for detecting underground electrically conductive objects An apparatus and method for detecting vertically or horizontally oriented underground electrical conductors such as electrical wiring or rails in tunnels thin conducting ore veins surrounded by less conducting rock, or boreholes filled with conductive wat... | 02/19/1991 |
| 4968978 | Long range multiple point wireless control and monitoring system A method for remotely monitoring conditions such as carbon monoxide for methane gas concentration, longwall roof support pressure, machine parameters or uncut coal, trona or potash layer thickness in a natural resource mining system such as a longwall or ... | 11/06/1990 |
| 4879755 | Medium frequency mine communication system A method for using an underground mine communication system to effect minewide communication and an intrinsically safe current limiter circuit for insuring that electrical equipment in the system will not cause incendiary conditions. The underground mine ... | 11/07/1989 |
| 4753484 | Method for remote control of a coal shearer A method for remotely controlling the mechanical functions of a coal cutting machine's electrohydraulic system which utilizes a medium frequency remote control communication system and a coal-rock interface sensor. The coal-rock interface sensor is a shie... | 06/28/1988 |
| 4742305 | Method for constructing vertical images of anomalies in geological formations Apparatus and method for detecting geological anomalies occuring in geological formations. The instrumentation comprises a medium frequency continuous wave narrowband FM transmitter and receiver pair. Two instrument configurations are downhole instruments... | 05/03/1988 |
| 4691166 | Electromagnetic instruments for imaging structure in geologic formations Instrumentation and procedures for detecting geological anomalies occurring in layered coal formations. The instrumentation comprises a medium frequency continuous wave narrowband FM transmitter and receiver pair. Two instrument configurations are disclos... | 09/01/1987 |
| 4577153 | Continuous wave medium frequency signal transmission survey procedure for imaging structure in coal seams Instrumentation and procedures for detecting geological anomalies occurring in layered coal formations. The instrumentation comprises a medium frequency continuous wave narrowband FM transmitter and receiver pair. Two instrument configurations are disclos... | 03/18/1986 |
