Patents Assigned to Coal Industry (Patents) Limited
  • Phenanthrene/HCHO derived polyamide-imide
    Patent number: 4346212
    Abstract: This invention relates to thermally stable resins and provides such a resin made from cheaply available coal-derived materials, whereas presently available resins are made from increasingly expensive oil-derived materials.The resin comprises the condensation product of a reaction between an aromatic diamine and a phenanthrene-formaldehyde reaction product, which product has been oxidized to produce keto groups bridging the phenanthrene moieties and carboxy groups. The condensation product is a poly-(amide-imide).The invention also includes a method of making the resin and varnishes containing the resin.The resin will find use for instance as a high temperature insulator or in glass or asbestos laminates in compressor blades.
    Type: Grant
    Filed: July 31, 1980
    Date of Patent: August 24, 1982
    Assignee: Coal Industry (Patents) Limited
    Inventors: Joseph G. Robinson, David I. Barnes, Angela M. Carswell
  • Device for rotating a body
    Patent number: 4343515
    Abstract: The invention relates to a device for rotating a body, such as the boom of a roadheader. The device comprises a pivotally mounted yoke having in it a slot in which is slidably mounted a member which is rotatably and eccentrically attached to the body, and a pair of opposed pivotally mounted rams each of which is rotatably attached to the yoke, the rams being operated out of phase such that they cause the yoke to pivot about its mounting, the pivotal movement being translated into a rotation of the body by movement of the member in the slot. Preferably the member is moved to and fro in the slot by means of a third ram mounted on the yoke.
    Type: Grant
    Filed: October 19, 1979
    Date of Patent: August 10, 1982
    Assignee: Coal Industry (Patents) Limited
    Inventors: Robert H. Higgs, John M. Jones
  • Equipment for laying a layer of elongate material adjacent to an exposed rock or mineral surface in an underground mine
    Patent number: 4339216
    Abstract: Equipment for laying a layer of elongate material adjacent to an exposed rock or mineral surface in an underground mine comprises a support bracket for attachment to a mining machine body, support arms means pivotally supported by the support bracket at one end and having support means for a store of elongate material at its other end, in use, the support means being urged towards the exposed rock or mineral surface by resilient means co-operating with an over-center device mounted on the support bracket.
    Type: Grant
    Filed: March 24, 1980
    Date of Patent: July 13, 1982
    Assignee: Coal Industry (Patents) Limited
    Inventor: Roy L. Bell
  • Controlling the treatment of mixtures comprising solid and liquid
    Patent number: 4336143
    Abstract: In the control of the treatment of a mixture (eg slurry, tailings or sludge) comprising solid (eg fine coal, shale, or clay) and liquid (eg water) signals are derived which are indicative of the total liquid in the mixture fed for treatment and of the cumulative discharged filtrate, the signals being processed to give an indication of the amount of liquid retained in the mixture as the treatment progresses, at least a part of the treatment being controlled in response to the derived signal comparison.
    Type: Grant
    Filed: August 11, 1980
    Date of Patent: June 22, 1982
    Assignee: Coal Industry (Patents) Limited
    Inventor: John Abbott
  • Resin derived from acenaphthene, process for its production and intermediates in its production
    Patent number: 4334055
    Abstract: The invention relates to a novel resin derived from acenaphthene and to process for its production.The resin comprises oligomers of naphthalic acid groups bridged by substantially only keto groups, the oligomers being joined together with a di- or tetra-functional primary aromatic amine and having been derived from a resin produced by acid-catalyzed condensation of acenaphthene and a formaldehyde donor.It is envisaged that the resin will be of use in the preparation of drogue parachutes and in other circumstances where a thermally stable resin is required.
    Type: Grant
    Filed: August 11, 1981
    Date of Patent: June 8, 1982
    Assignee: Coal Industry (Patents) Limited
    Inventors: Joseph G. Robinson, Sally A. Brain
  • Quenching process
    Patent number: 4330394
    Abstract: The tar vapors from carbonizing coal, preferably in a fluidized bed, are treated by quenching with a hydrogen-donor solvent. Tar molecules prone to polymerization upon condensation and upon distillation are partially hydrogenated; the resulting tar solution is of lower viscosity and less likely to coke or form pitch.
    Type: Grant
    Filed: October 7, 1980
    Date of Patent: May 18, 1982
    Assignee: Coal Industry (Patents) Limited
    Inventor: John O. H. Newman
  • Acoustic liner for attenuating noise
    Patent number: 4327816
    Abstract: An acoustic liner for attenuating noise comprises a backing face and a perforated facing sheet arranged over and spaced from the backing face, the perforated facing sheet being on non-uniform porosity in the direction of noise propagation.
    Type: Grant
    Filed: April 28, 1980
    Date of Patent: May 4, 1982
    Assignee: Coal Industry (Patents) Limited
    Inventor: Stuart C. Bennett
  • Training breathing apparatus
    Patent number: 4325364
    Abstract: To simulate the experience of breathing hot or warm air in the use of breathing apparatus, this invention provides an apparatus comprising a canister through which the wearer inhales and exhales, the canister being filled with a reagent which creates heat by reaction with the carbon dioxide or moisture in the exhaled breath. The inhaled air absorbs the heat given out by the reaction. The apparatus can be modelled on the actual breathing apparatus to be used and is highly acceptable to users.
    Type: Grant
    Filed: December 26, 1978
    Date of Patent: April 20, 1982
    Assignee: Coal Industry (Patents) Limited
    Inventor: John D. Evans
  • Radiation detectors supported by resilient optical coupler
    Patent number: 4323778
    Abstract: A sensor which is robust for use in an industrial environment. The sensor employs two scintillation crystals to offer a sufficient crystal volume and the crystals are optically coupled through a silicone rubber compound. The compound also allows the crystals to vibrate independently so that they do not shatter. A single photomultiplier detects scintillation occurring in all the crystals.
    Type: Grant
    Filed: June 2, 1978
    Date of Patent: April 6, 1982
    Assignee: Coal Industry (Patents) Limited
    Inventors: John S. Wykes, Ian Adsley
  • Excavating machines for excavating rock and minerals having first and second alternative modes of control
    Patent number: 4322113
    Abstract: A excavating machine for excavating rock and minerals from a working face having a carriage with a boom support. A cutter carrying boom is moveably supported by the boom support, and a means is provided for moving the boom relative to the carriage. A drive means is included with a sensing control means for controlling the movement of the boom relative to the carriage. The sensing control means senses a parameter proportional to the reaction cutting force on the cutter. Control over the movement of the boom is provided in two alternative modes of control. A rate mode control for controlling the machine in accordance with a preselected rate of the output of the drive means is provided, as well as a load mode control in which the movement of the boom is controlled maintaining the reaction cutting force exerted by the cutter substantially at or below a certain value.
    Type: Grant
    Filed: April 3, 1980
    Date of Patent: March 30, 1982
    Assignee: Coal Industry (Patents) Limited
    Inventors: Timothy P. Taylor, Joseph Dowell, Francis A. Haskew
  • Temperature measurement system
    Patent number: 4322725
    Abstract: The invention provides a fire detection system which comprises an electric thermal transducer such as a thermistor placed in a turbulent gas stream. The transducer produces a signal, having an AC and a DC component, which signal is preferably amplified. The components are separated out in a discriminator, for instance an AC amplifier and the AC component is squared and integrated to give a final output which is proportional to the temperature of a heat source, such as a fire, upstream of the transducer. The invention also provides a fire detection system comprising a series of transducers connected to a single processing apparatus, the signal from the transducers being compared to locate a heat source. The invention also provides a method of detecting a fire using a system as described above.
    Type: Grant
    Filed: June 27, 1980
    Date of Patent: March 30, 1982
    Assignee: Coal Industry (Patents) Limited
    Inventor: Michael J. Annetts
  • Sampling equipment for sedimentation rate measuring
    Patent number: 4318296
    Abstract: Sampling equipment is provided for sensing and controlling the settling rate of a flocculated slurry suspension in a settling tank, the sampling equipment comprises a metering device (23) including a vertical settling chamber for repeatedly taking a sample of the suspension from the settling tank. Means (33, 35, 19) are provided for temporarily retaining the height of the sample at a preselected level during a settling period and detector means (40, 41, 42) are provided for detecting when a boundary level defined by the settling solids reaches a further preselected level. Timer means determine the actual settling period elapsing between the start of the settling period and the time when the boundary level has reached the further preselected level.
    Type: Grant
    Filed: April 28, 1980
    Date of Patent: March 9, 1982
    Assignee: Coal Industry (Patents) Limited
    Inventors: David S. Parker, Stephen R. Shaw, Robert Hudson
  • Fluid flow monitors
    Patent number: 4318303
    Abstract: A fluid flow monitor of the sort which detects the rate of formation of Karman vortices caused by a blunt obstruction in a fluid stream. The invention mitigates problems associated with the formation of spurious electrical signals not related to the Karman vortices by providing an amplifier which amplifies frequencies selected by a comparator arrangement the comparator arrangement being controlled by the value of a further signal proportional to the number of detected Karman vortices.
    Type: Grant
    Filed: November 12, 1980
    Date of Patent: March 9, 1982
    Assignee: Coal Industry (Patents) Limited
    Inventor: Pete F. Harrington
  • Mining equipment
    Patent number: 4315658
    Abstract: Mining equipment adapted for repeated traversing to and fro adjacent to a conveyor arranged along a longwall face in an underground mine, has a mining machine support structure which bridges the conveyor and which has a curtain for guiding airborne dust arising during cutting of mineral by a rotary cutting head mounted on the machine. The air flow passage defined by the curtain has an air flow inducing means therein, such as a fan or water spray.
    Type: Grant
    Filed: April 16, 1980
    Date of Patent: February 16, 1982
    Assignee: Coal Industry (Patents) Limited
    Inventors: Albert G. French, Derek J. Brooks
  • Mineral mining machine with high pressure fluid nozzle and intensifier
    Patent number: 4314730
    Abstract: The machine comprises a rotatable cutting head and a high pressure water nozzle. The nozzle directs a jet of high pressure (up to 2,100 kg/cm.sup.2) water at the rock adjacent the cutting head. The jet of water provides an auxiliary cutting and breaking action, thus easing the load on the head. The water jet also suppresses dust formation.
    Type: Grant
    Filed: March 14, 1979
    Date of Patent: February 9, 1982
    Assignee: Coal Industry (Patents) Limited
    Inventors: Norman A. Plumpton, Malcolm G. Tomlin
  • Catalysts
    Patent number: 4313852
    Abstract: A hydrotreating catalyst which is resistant to carbonaceous deposits and is particularly useful for hydrotreating coal-derived liquids, is molybdenum or tungsten disulphide in an amount of 0.1 to 10% by weight, substantially completely on the outer surface of an active carbon support having a surface area in excess of 800 m.sup.2 /g. The catalyst can be made by absorbing molybdenum or tungsten trisulphide onto the active carbon support and reducing the trisulphide to the disulphide.
    Type: Grant
    Filed: July 1, 1980
    Date of Patent: February 2, 1982
    Assignee: Coal Industry (Patents) Limited
    Inventors: Derek G. Gavin, Michael A. Jones
  • Sizing screens
    Patent number: 4308135
    Abstract: A sizing screen for particulate material of different sizes has a generally horizontal rotatable circular screen surface having a plurality of elongate radially projecting members, first collection means positioned adjacent the outer periphery of the surface for collecting an oversize fraction of the particulate material, second collection means positioned below the surface for collecting an undersize fraction of the material which passes through the screen. Discharge means comprising a rotatable table partitioned into different parts for carrying the oversize and undersize material is positioned below the first and second collection means. A plough or paddle preferably urges material from the table into outlets. The screen is suitable for handling sticky material such as coal fines and clay.
    Type: Grant
    Filed: September 18, 1979
    Date of Patent: December 29, 1981
    Assignee: Coal Industry (Patents) Limited
    Inventors: Michael P. Armstrong, Rodney W. O'Brian, Stanley Gilliver
  • Clamp
    Patent number: 4305561
    Abstract: A clamp comprises two opposed generally `C` shaped components each of which co-operates with a wedge formation on the other of the components in a manner which upon the drawing together of the two components the wedge formation effectively reduces the space between the limbs of the generally `C` shaped formation of the other component.
    Type: Grant
    Filed: October 5, 1978
    Date of Patent: December 15, 1981
    Assignee: Coal Industry (Patents) Limited
    Inventors: Rodney J. A. Hunter, Henry Mappin
  • Slideway means and excavating machines comprising slideway means
    Patent number: 4303275
    Abstract: A slideway arrangement comprises a slideway component and a slide component guidably slidable with respect to the slideway component under the action of a hydraulic ram. At least one of the components comprises at least one wedge arrangement and a hydraulic ram for urging the wedge arrangement to releasably wedge one of the components to the other of the components.
    Type: Grant
    Filed: November 30, 1979
    Date of Patent: December 1, 1981
    Assignee: Coal Industry (Patents) Limited
    Inventors: Francis A. Haskew, Leslie A. Jones
  • Infra-red analysis apparatus and method
    Patent number: 4303859
    Abstract: The technique of attenuated total reflection (ATR) analysis can be applied to the deposit on a filter, enabling crystalline silica deposited on a glass fibre filter to be determined, which is impossible using transmission IR spectrophotometry. An improved ATR apparatus has pressure means to bring a sample such as that collected on a filter into contact with the prism and is arranged such that the face of the prism defines the area of the sample for analysis.
    Type: Grant
    Filed: January 3, 1980
    Date of Patent: December 1, 1981
    Assignee: Coal Industry (Patents) Limited
    Inventor: John McCue