Patents Assigned to Coal Industry (Patents) Limited
  • Method of dechlorinating coal
    Patent number: 4462807
    Abstract: This invention relates to a method of dechlorinating coal, which comprises treating washery-processed coal having a particle size from 1 to 12 mm with aqueous ammonia having a concentration from 1 to 18 M for from 3 to 25 hours.The invention will be of use in the preparation of coal for coal utilization plants so that the coal is less likely to cause corrosion.
    Type: Grant
    Filed: July 21, 1982
    Date of Patent: July 31, 1984
    Assignee: Coal Industry (Patents) Limited
    Inventors: Sarath S. Jayasinghe, Michael A. Hooker, Denis H. T. Spencer
  • Treatment of organics containing water
    Patent number: 4460476
    Abstract: Organic solvents miscible with water and containing from 2 to 50% of water can be dried by passage over a molecular sieve capable of retaining water after it has been dehydrated, at a superficial velocity of less than 15 cm/min and using columns having specified lengths relative to the mass transfer zone.
    Type: Grant
    Filed: August 3, 1983
    Date of Patent: July 17, 1984
    Assignee: Coal Industry (Patents) Limited
    Inventors: David J. A. McCaffrey, William D. Jones
  • Probe equipment for use in underground mining
    Patent number: 4459478
    Abstract: The present invention provides probe equipment for mounting on an underground mining machine in order to receive radiation from strata adjacent to the mining machine, the probe equipment comprising a housing having screening shields defining the boundaries of a window for allowing passage into the housing of radiation from said strata, the radiation being received by sensing means mounted within the housing. Radiation barrier means interrupt at least some of the radiation from the shale strata to effectively provide a degree of collimation to the path of the received radiation to thereby limit the field of vision of the sensing means to an acceptable extent.
    Type: Grant
    Filed: October 5, 1981
    Date of Patent: July 10, 1984
    Assignee: Coal Industry (Patents) Limited
    Inventor: Sydney F. Powell
  • Waterproof sheeting
    Patent number: 4458043
    Abstract: A waterproof sheeting exhibiting improved temperature characteristics and good properties when bonded with molten bitumen comprises by weight 10 to 40 parts of unplasticized PVC, 10 to 40 parts of an ethylene vinyl acetate carbon monoxide terpolymer and 5 to 35 parts of coal tar pitch.
    Type: Grant
    Filed: October 27, 1982
    Date of Patent: July 3, 1984
    Assignee: Coal Industry (Patents) Limited
    Inventors: Edwin L. Evans, Ronald Sidebottom, David W. Price, Roger L. Bonafont
  • Mine equipment
    Patent number: 4453846
    Abstract: This invention provides mine equipment for sensing the advance of mobile equipment, particularly on longwall face conveyors the equipment comprises two mine roof supports provided with sensor means for sensing relative movement between the associated roof supports and an elongate bar component secured to the conveyor and extending between the two supports in a direction rearwardly of the conveyor. The elongate component is magnetized so that a magnetic field is induced adjacent thereto, the induced magnetic field intensity varying longitudinally of the elongate component.
    Type: Grant
    Filed: December 9, 1981
    Date of Patent: June 12, 1984
    Assignee: Coal Industry (Patents) Limited
    Inventors: Rex Mullins, David Brenkley
  • Method of determining the bulk strength of strata
    Patent number: 4445032
    Abstract: The bulk rock strength of strata is determined by logging a borehole with an instrument to obtain a Neutron-Neutron log or a Hydrogen Index log of the hole and determining from the log in conjunction with the lithology of the strata the strength of the strata rocks by applying an inverse relation formula.
    Type: Grant
    Filed: October 20, 1981
    Date of Patent: April 24, 1984
    Assignee: Coal Industry (Patents) Limited
    Inventors: Anthony Halker, David W. Mellor, Keith R. Whitworth, Nicholas J. Kuszner
  • Electromagnetic position detector employing fast fourier transform analysis
    Patent number: 4443792
    Abstract: A high frequency signal is beamed into a bunker and a reflected signal from the top of the contents in the bunker is detected and fed into electronic circuitry. This circuitry obtains a beat signal dependent in frequency on the height of material in the bunker and the signal is subjected to division in a processing circuit and subsequent treatment as a Fast Fourier transform. A store gathers all divided and transformed segments of the signal to provide a spectrum from which the level of the bunker can be obtained as a read out.
    Type: Grant
    Filed: August 11, 1981
    Date of Patent: April 17, 1984
    Assignee: Coal Industry (Patents) Limited
    Inventors: Brian G. Pidgeon, Clive R. Bavington
  • Fluidic switched fluid cleaning
    Patent number: 4432778
    Abstract: The present invention provides a fluid cleaning system, especially designed for removing particulate contaminants from a hot gas, comprising at least two parallel lines for receiving contaminated fluid. Each line includes a collector (5), a collector cleaning means (8), and a vortex amplifier (6). The vortex amplifiers are used in place of mechanical valves to control the system by opening and closing their respective lines. Each cleaning means (8) can only operate when its line is closed.
    Type: Grant
    Filed: March 23, 1983
    Date of Patent: February 21, 1984
    Assignee: Coal Industry (Patents) Limited
    Inventors: Michael J. Parkinson, Anthony W. Jury, Nicholas Syred, Ieuan Owen
  • Apparatus and method for assessing the concentration of mineral matter in coal-derived liquids
    Patent number: 4429410
    Abstract: Mineral matter is coal-derived liquids such as coal extracts can be assessed on-line by passing an X-ray beam having as a predominant component wavelengths in the range 0.6 to 0.8 Angstrom units through the liquid and detecting the intensity of the transmitted radiation. X-ray wavelengths in this range permit adequate discrimination between attenuation caused by mineral matter and that caused by the liquid, without having very poor transmission. X-ray tubes or radioisotopes can be used as a source.
    Type: Grant
    Filed: January 29, 1981
    Date of Patent: January 31, 1984
    Assignee: Coal Industry (Patents) Limited
    Inventors: Anthony W. Jury, Geoffrey J. Pitt
  • Mining machine control signal processing system
    Patent number: 4428618
    Abstract: A signal processing system for an underground mining machine having a steerable mineral cutter and a sensor which senses natural radiation emitted from rock strata overlaying the radiation absorbing mineral and which derives a sensor signal representative of the cutting horizon of the cutter, comprises processing means for receiving and processing the sensor signal to derive an operational signal indicative of the cutter horizon of the cutter, calibration means for accepting a fed in calibration signal representative of a known existing condition of the cutting horizon and comparator means for comparing the derived operational signal with the calibration signal to determine an error in the derived operational signal and for instructing the processing means to apply a suitable correction to the derived operational signal.
    Type: Grant
    Filed: September 29, 1981
    Date of Patent: January 31, 1984
    Assignee: Coal Industry (Patents) Limited
    Inventor: Graham J. Fecitt
  • Screening apparatus
    Patent number: 4428832
    Abstract: The sizing screen comprises a plurality of rotatable screening decks mounted co-axially one below the other. The uppermost screening deck is rotated at a slower speed than the relative fast revolving lowermost screen deck.
    Type: Grant
    Filed: November 19, 1981
    Date of Patent: January 31, 1984
    Assignee: Coal Industry (Patents) Limited
    Inventors: Michael P. Armstrong, Rodney W. O'Brian, Stanley Gilliver
  • Rotary cutter heads for mining machines
    Patent number: 4428619
    Abstract: A rotary cutter head having generally helical loading vanes for urging cut rock or mineral towards a mining machine supporting the cutter head is provided with air flow inducing means for inducing an air flow in a direction substantially away from the mining machine.
    Type: Grant
    Filed: October 14, 1980
    Date of Patent: January 31, 1984
    Assignee: Coal Industry (Patents) Limited
    Inventors: Brian A. Eagles, Jonathan S. Kelly
  • Amorphous silica-based catalyst and process for its production
    Patent number: 4427578
    Abstract: This invention relates to a catalyst for use in the direct conversion of synthesis gas to olefinic hydrocarbons in good yield. It also relates to a process for producing the catalyst.The catalyst comprises a highly porous amorphous silica support on which is deposited one or more monolayers of silica. The catalyst is then impregnated with a transition metal. The monolayer of silica is formed by the hydrolysis of a compound such as ethyl orthosilicate while it is adsorbed onto the support.
    Type: Grant
    Filed: July 7, 1982
    Date of Patent: January 24, 1984
    Assignee: Coal Industry (Patents) Limited
    Inventors: Joseph G. Robinson, David I. Barnes, Angela M. Carswell
  • Moisture sensor
    Patent number: 4427976
    Abstract: This invention relates to a device for sensing moisture on a metal surface such as a brake path. Since the presence of moisture on a brake path causes inefficient working of the brake, it is necessary to test for moisture. Originally this was done by hand. The present invention provides a device which can test for moisture automatically. The device comprises a pair of contacts urged against an electrically conducting surface. One contact is covered by a strip of material, for instance paper, which is an insulator when dry and a conductor when moist. If moisture is present an electrical circuit comprising the surface, the moist material and the two contacts is completed activating an alarm. The material may be salt impregnated and the contacts may be moveable over the surface. The device is for use in testing for moisture on the braking surface of colliery winding installations.
    Type: Grant
    Filed: August 22, 1979
    Date of Patent: January 24, 1984
    Assignee: Coal Industry (Patents) Limited
    Inventor: Peter M. Lord
  • Domestic combustion appliances
    Patent number: 4422410
    Abstract: A domestic combustion appliance 1 has a body 2 having a distributor plate 14 for supporting a shallow fluidized bed 32. A primary boiler 34 forms part of a rear bounding wall for the fluidized bed 32, and a secondary boiler 50 is located downstream providing flue passages for exhaust gases. A window 10 is provided in the front wall 8 to give a visual effect for volatiles burning, in use, above the bed 32.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: December 27, 1983
    Assignee: Coal Industry (Patents) Limited
    Inventors: John M. Lake, Robert C. Payne
  • Fluid flow monitors
    Patent number: 4418579
    Abstract: A fluid flow monitor of the sort which detects of rate of formation of Karman vortices caused by a vortex inducing element in a fluid flow along a passage is provided with at least one formation associated with at least one side of the passage and tending to interfere with fluid flow along the passage, the formation being provided on the downstream side of the vortex inducing element.
    Type: Grant
    Filed: December 12, 1980
    Date of Patent: December 6, 1983
    Assignee: Coal Industry (Patents) Limited
    Inventor: Peter F. Harrington
  • Froth flotation
    Patent number: 4416769
    Abstract: This invention relates to froth flotation of coal.According to the invention a predominantly paraffinic residual oil having a cut point of at least 190.degree. C. at atmospheric pressure is used as a "collector" for the froth flotation of minerals. A preferred oil is a coal spray oil used in coke oven technology. The "collector" is for use with a "frother" such as a polyglycol ether.
    Type: Grant
    Filed: December 24, 1981
    Date of Patent: November 22, 1983
    Assignee: Coal Industry (Patents) Limited
    Inventors: David J. A. McCaffrey, William D. Jones, deceased
  • Mixing equipment
    Patent number: 4408886
    Abstract: Powdered or particulate material, especially cement which is prone to caking, is stored in a fluidized storage container (1) and is conveyed in predetermined amount by conveyor means (15) to a mixer unit (20). The material is mixed with water which is also supplied to the mixer unit to form a grout which can be used in pump packing systems in underground mines. The invention provides simple equipment capable of reliably handling large quantities of cement, and is particularly suited for use underground in coal mines. (References to FIG. 1).
    Type: Grant
    Filed: February 17, 1982
    Date of Patent: October 11, 1983
    Assignee: Coal Industry (Patents) Limited
    Inventors: John D. Sampson, David J. W. Sparrow
  • Varnishes for glasscloth laminates, methods of their production and laminates made therefrom
    Patent number: 4408003
    Abstract: The present invention relates to varnishes for use in the preparation of glasscloth laminates, methods of their production and laminates made therefrom.The varnish is made by dissolving 100 parts of a TFP resin having a number average molecular weight of about 1000 and an oxygen content of about 8% in 60 to 65 parts of butan-2-one or isopropanol. 8 to 12 parts of hexamine are dissolved in a minimum quantity of a solvent comprising water and IMS in a ratio of about 3:5. The two solutions are thoroughly mixed and filtered to produce the varnish.The varnish is used to prepare glasscloth laminates for use as printed circuit boards.
    Type: Grant
    Filed: October 15, 1981
    Date of Patent: October 4, 1983
    Assignee: Coal Industry (Patents) Limited
    Inventors: Joseph G. Robinson, Sally A. Brain
  • Gas sensor
    Patent number: 4406770
    Abstract: A gas sensor cell assembly has planar electrodes separated by a planar hydrophilic wick which extends through the electrode into an electrolyte expansion chamber where it contacts an electrolyte. The cell is extremely compact and operates in all orientations.
    Type: Grant
    Filed: February 1, 1982
    Date of Patent: September 27, 1983
    Assignee: Coal Industry (Patents) Limited
    Inventors: Yat S. Chan, Anthony D. S. Tantram, Bryan S. Hobbs, John R. Finbow