| Patent Number |
Title Of Patent |
Date Issued |
| 4501449 |
Fluid supply for rotary cutter heads for mining machines |
February 26, 1985 |
| A fluid supply system for a rotary cutter head for a mining machine, comprises a relatively low pressure feed arrangement for feeding relatively low pressure fluid to discharge nozzles directing fluid sprays towards the cutting zone of the cutter head, and a relatively high pressure |
| 4496203 |
Drill pipe sections |
January 29, 1985 |
| A drill pipe section enables electrical information signals to be transmitted along a borehole to feed information generated by instruments situated adjacent to the drilling bit along the drill string to monitoring and/indication equipment situated adjacent to the drilling machine. The |
| 4487682 |
Coal extraction |
December 11, 1984 |
| Coal extracts from hydrogenative liquid extraction of coals can be more easily and more quickly filtered if the extraction is carried out at a temperature over 420.degree. C. and the resulting extract is fractionated using a cut point in the range 200.degree. to 300.degree. C. to remove |
| 4486894 |
Method of and apparatus for sensing the ash content of coal |
December 4, 1984 |
| The ash content of a granular coal sample having a moisture content greater than 10% by weight is sensed by bombarding it with primary radiation comprising at least two spectrums of energies (46 KeV and 9-17 KeV) to cause radiative reactions in the coal, sensing the secondary radiation |
| 4485666 |
Gas analyzer |
December 4, 1984 |
| A portable gas analyzer uses a pump to take a gas sample and pump it through a carbon monoxide sensing cell, an oxygen-sensing cell and a methane-sensing pellister. Concentrations of these gases are displayed continuously on LCD displays. The gas analyzer is particularly useful in un |
| 4484937 |
Dust filter apparatus |
November 27, 1984 |
| Dust filter apparatus comprises a first, coarse dust removal stage constituted by a plurality of swirl chamber devices into which a liquid is sprayed and a second, fine dust removal stage constituted by a wetted filter panel. |
| 4476943 |
Drilling equipment with adaptor for steering long boreholes |
October 16, 1984 |
| Drilling equipment for steering relatively long boreholes in rock strata comprises an adaptor for installation adjacent to the drill bit, the adaptor having an inner rotary component drivably connected between the drill rod assembly and the drill bit and a relatively outer component. |
| 4476013 |
Froth flotation |
October 9, 1984 |
| In the froth flotation of coal, especially coking coal, improved results are observed when using as a collector an oil distillate cut within the range 80.degree. to 250.degree. C., containing less than 20% by weight of naphthenes, less than 20% by weight of aromatic content and more than |
| 4475931 |
Gas cleaning |
October 9, 1984 |
| This invention relates to a method for the production of gases free from particulate contaminants, for use in driving gas turbines without causing fouling or corrosion of the blading.The method comprises feeding a gas contaminated with particulate material, for instance produced by the c |
| 4469814 |
Catalysts |
September 4, 1984 |
| An improved catalyst for conversion of oxygen-containing aliphatics to hydrocarbons is a silica xerogel having a layer of an aluminum compound chemically bonded onto its surface, having a maximum pore diameter of 1.1 nm and having substantially only protons and/or transition metal cation |
| 4465318 |
Rotary cutting head for mining machines with means for inducing airflow and sensing thereof |
August 14, 1984 |
| A rotary cutter head for a coal mining machine comprises sensor means for sensing a preselected state, as for example, the methane concentration in the vicinity of the cutter head and for deriving a signal indicative of the sensed preselected state. |
| 4462807 |
Method of dechlorinating coal |
July 31, 1984 |
| 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 |
| 4460476 |
Treatment of organics containing water |
July 17, 1984 |
| 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 m |
| 4459478 |
Probe equipment for use in underground mining |
July 10, 1984 |
| 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 pa |
| 4458043 |
Waterproof sheeting |
July 3, 1984 |
| 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. |
| 4453846 |
Mine equipment |
June 12, 1984 |
| 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 |
| 4445032 |
Method of determining the bulk strength of strata |
April 24, 1984 |
| 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 |
| 4443792 |
Electromagnetic position detector employing fast fourier transform analysis |
April 17, 1984 |
| 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 |
| 4432778 |
Fluidic switched fluid cleaning |
February 21, 1984 |
| 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 ampl |
| 4429410 |
Apparatus and method for assessing the concentration of mineral matter in coal-derived liquids |
January 31, 1984 |
| 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 wavele |
| 4428832 |
Screening apparatus |
January 31, 1984 |
| 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. |
| 4428619 |
Rotary cutter heads for mining machines |
January 31, 1984 |
| 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. |
| 4428618 |
Mining machine control signal processing system |
January 31, 1984 |
| 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 |
| 4427976 |
Moisture sensor |
January 24, 1984 |
| 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 |
| 4427578 |
Amorphous silica-based catalyst and process for its production |
January 24, 1984 |
| 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 monolay |
| 4422410 |
Domestic combustion appliances |
December 27, 1983 |
| 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 gas |
| 4418579 |
Fluid flow monitors |
December 6, 1983 |
| 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 alo |
| 4416769 |
Froth flotation |
November 22, 1983 |
| 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 use |
| 4409096 |
Control systems for material treatment plant |
October 11, 1983 |
| A control system of particulate material treatment plant comprising screening means which produces undersize and oversize fractions and which is controllable to vary one size fraction relatively to the other size fraction, preparation or dense medium washer means producing a relatively |
| 4408886 |
Mixing equipment |
October 11, 1983 |
| 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 |
| 4408003 |
Varnishes for glasscloth laminates, methods of their production and laminates made therefrom |
October 4, 1983 |
| 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 |
| 4406770 |
Gas sensor |
September 27, 1983 |
| 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. |
| 4406354 |
Brake equipment for underground mining machines |
September 27, 1983 |
| Brake equipment for an underground mining machine, which in use traverses to and fro adjacent to a stationary rail extending along a longwall face and which includes a hydraulic haulage drive motor for hauling the machine along the longwall face, is activated to engage the stationary rai |
| 4394499 |
Polyimide resins |
July 19, 1983 |
| This invention relates to an improved polyimide resin and to a method of its production.The improved polyimide resin is made from phenanthrene which is converted via a 9, 10-diol to oligomers of diphenic anhydride units linked by keto bridges. The oligomers are reacted with from 0.1 to 0 |
| 4393484 |
Method of stacking seismic data |
July 12, 1983 |
| Faults in a mineral seam are located by an in-seam seismic technique which involves locating shots and detectors in the seam and firing the shots sequentially. The detectors pick up the reflections of the shots from faults and a common reflection point is determined by analyzing the |
| 4374326 |
Method for determining the proportion of at least one material in a moving mixture of materials |
February 15, 1983 |
| The proportion of a radioactive material in a moving mass of material is determined with a sensor which derives an output signal proportional to the mass of radioactive material. The output signal is calibrated against known reference values to give a quantitative value of mass. Problems |
| 4373613 |
Vehicle brake equipment |
February 15, 1983 |
| Brake equipment is provided for a vehicle adapted to travel along a path adjacent to an elongated stationary rail the brake equipment comprising a resiliently applied brake member arranged to abut one side of the stationary rail and a pivotally mounted reaction brake member on the op |
| 4373089 |
Phenanthrene based polyimide resin |
February 8, 1983 |
| A polyimide resin is made by converting a phanthrene to its 9, 10 diol derivative, reacting the derivative with formaldehyde to give a methylene bridged reaction product, oxidizing the reaction product to produce a polycarboxylated product, and reacting the polycarboxylated product with |
| 4371727 |
Fuel oils from coal |
February 1, 1983 |
| Fuel oils especially suitable as gas oils for fuelling high speed Diesel engines, are made by hydrogenating a middle oil derived from coal and containing at least 90% of polycyclic hydrocarbons and essentially no paraffinic material, and fractionating the hydrogenated oil to yield the |
| 4371209 |
Mining machine steering equipment |
February 1, 1983 |
| A mining machine comprising a ranging drum having two operational positions adjacent to the mine roof and to the mine floor, respectively, is provided with machine steering equipment comprising a component having two operational modes associated with the two operational positions of the |
| 4368919 |
Holder assemblies for sensitized cutter tools on mining machines |
January 18, 1983 |
| A holder assembly for a sensitized cutter tool on a cutter head of a mining machine, comprises an outer component mountable on the cutter head and defining a recess and an inner component engageable within the recess by movement in at least one direction, the inner component providing ho |
| 4367899 |
Holder assemblies for sensitized cutter tools on mining machines |
January 11, 1983 |
| A holder assembly for a sensitized cutter tool mountable on a cutter head of a mining machine comprises a holder adapted to hold the tool. The holder is pivotal supported abutting a mounting sensor means provided to sense cutting reaction on the tool, the cutting reaction tending to urge |
| 4367898 |
Excavating machines for tunneling with template fixed to boom |
January 11, 1983 |
| An excavating machine for excavating rock or mineral to extend an underground roadway or tunnel comprises a mobile carriage provided with a support assembly for a pivotally-mounted cutter carrying boom. In addition, the machine comprises an indication mechanism mounted on either the |
| 4362153 |
Breathing apparatus |
December 7, 1982 |
| A breathing apparatus comprises a high pressure oxygen source, a reducing valve, set to give a constant flow rate of from 4 to 30 1/min of oxygen, personal gas supply means, with an inhalation valve and an exhalation valve, a regenerative section and a breathing bag. The apparatus provid |
| 4361219 |
Swivelling arrangements |
November 30, 1982 |
| A swivelling arrangement for controlling relative angular movement between two components comprises a yoke pivotally mounted on one of the components and pivotally movable under the action of a ram. The yoke has two limbs to the radially outermost ends of which are fixedly secured the en |
| 4359639 |
Method of and apparatus for determining the nature of transported material |
November 16, 1982 |
| A coal/stone mixture transported on a conveyor is investigated by subjecting it to two radiation beams of differing energies. In a preferred embodiment, the higher energy radiation is collimated into a pencil beam and the lower energy radiation into a fan beam. Detector shielding pre |
| 4358827 |
Controlling the treatment of mixtures comprising solid and liquid |
November 9, 1982 |
| Treatment equipment for mixtures comprising solid and liquid is controlled by determining a value comprising the cumulative mass throughput of solid and an inverse term comprising total treatment time, and monitoring said value substantially continuously until it substantially reaches a |
| 4357167 |
Methods of stowing cavities with flowable materials |
November 2, 1982 |
| A quick setting cementitious composition with good early strength characteristics contains, by volume, 1-30% of a cement mixture including Portland Cement, calcium aluminate and calcium sulphate, 0.001-5% of clay and water in excess of 65%. The composition is especially suited for fi |
| 4355895 |
Survey systems |
October 26, 1982 |
| A survey system for determining the shape of a fixed path along which there may be no line of sight from end to end. The system comprises a mobile optical detector adapted to travel along the path and a plurality of optical sources which can be arranged along the path. As it moves along, |
| 4352922 |
Method of producing an improved poly-(amide-imide) resin by reacting a phenanthrene with formald |
October 5, 1982 |
| According to the present invention, there is provided an improved method of producing a poly-(amide-imide) resin comprising the steps of:(1) reacting a phenanthrene with formaldehyde or a formaldehyde donor in the presence of an acid catalyst to give a phenanthreneformaldehyde reaction p |
