| Patent Number |
Title Of Patent |
Date Issued |
| 4218303 |
Coal pyrolysis |
August 19, 1980 |
| Hydropyrolysis of coal can be done as a two stage process, offering good yields of benzene. The first stage is carbonization of coal in the presence of hydrogen or reactive gas at elevated pressure. The volatile products, without cooling or condensing, are then subjected to cracking at |
| 4212382 |
Bunkering system |
July 15, 1980 |
| The device comprises a variable height metering door located over a conveyor used to remove material from a bunker. The door is pivotable, so that rogue material such as pit props may pass it, and is movable up and down relative to the conveyor, so that the depth of material on the c |
| 4209199 |
Mineral mining machines |
June 24, 1980 |
| A mineral mining machine incorporates a guideway defining runs for a cutter chain which carries cutter picks. The guideway is movable as a whole and is formed with runs for the chain. The runs of the guideway are of generally L-shaped cross section, although the invention is not so l |
| 4201676 |
Method of heat treating a material |
May 6, 1980 |
| A material in slurry form is heat treated by being sprayed onto a fluidized bed wherein its combustible component is burnt to generate heat. Elutriated fines material is recycled to the bed to control the mean particle size distribution in the bed and in such a manner as to secure th |
| 4200556 |
Reinforced rubber |
April 29, 1980 |
| A blend of rubber comprising 100 parts of a rubber, from 5 to 150 parts of a carbazole/phenol/formaldehyde resin, from 1 to 5 parts of a vulcanizing agent for the rubber and from 5 to 15 parts per hundred parts of the resin of a formaldehyde donor, is made up. This is done in any usual m |
| 4197873 |
Fluid operable valves |
April 15, 1980 |
| A fluid operable valve suitable for use in high temperature and pressure environments involving the flow of solids material, incorporates a main valve member and a pilot valve member co-operable with separate seats axially spaced apart in association with the inlet of the valve. The |
| 4196935 |
Equipment for laying elongate material |
April 8, 1980 |
| Equipment for laying a layer of wire mesh adjacent to a newly exposed mine roof comprises storage means (10) for a roll of mesh (11) and resilient guide means (12) for guiding the mesh (72) as it unwinds towards the newly exposed mine roof (5). |
| 4196934 |
Shortwall mining machine |
April 8, 1980 |
| The invention provides a shortwall mining machine comprising an assembly, which preferably is articulated and has a protective canopy. The assembly is arranged parallel to a shortwall mineral face, and a cutter is hauled along a guide on the assembly to cut the face. As the face is cut t |
| 4196798 |
Brake equipment for mining machines |
April 8, 1980 |
| Brake equipment for a mining machine which in use traverses to and fro adjacent to a stationary rail extending along a longwall face and which includes a haulage drive motor for hauling the mining machine along the longwall face, the brake equipment being activated to fixedly engage the |
| 4194790 |
Rock cutting tip inserts |
March 25, 1980 |
| The rock cutting tip insert of a rock cutting tool comprises two layers, the front layer being harder than the backing or base layer by at least one hundred units on the Vickers Hardness scale. |
| 4192824 |
Aromatic hydrocarbon resins |
March 11, 1980 |
| A method of producing a condensation product by reacting together an aromatic hydrocarbon with a carbonyl compound having more than one carbon atom (therefore excluding formaldehyde) in the presence of aluminium chloride or bromide, at a temperature of from 5.degree. to 90.degree. C. |
| 4190295 |
Mining machines with cutter chain tensioning means |
February 26, 1980 |
| A mineral mining machine suitable for working shortwall faces is provided with a pivotted cutter member including a guideway for a cutter chain carrying picks and paddle devices for scooping debris. The guideway is divided at or about its mid point into two parts which are interconnected |
| 4187523 |
Detecting a short circuit fault in a dynamo electric machine |
February 5, 1980 |
| A dynamo-electric machine is provided with a protective circuit arrangement whereby the machine is caused to be switched off if a short circuit current flowing in the machine exceeds a predetermined level.False operation of the protective circuit is avoided by incorporating a discriminat |
| 4181688 |
Phenolic resols blended with N-methylol carbazoles |
January 1, 1980 |
| Cross-linkable phenolic resols are known but do not have good water resistance. Phenolic resols can be blended with N-methylol carbazole or a derivative thereof to give a cross-linkable material useful for laminating or as a metal cement. |
| 4181360 |
Cutting force sensor |
January 1, 1980 |
| A rotary cutter head of a mineral mining machine has a sensor to detect the cutting horizon of the cutter head relative to a boundary of a mineral seam and to derive a signal indicative of changes in the cutting horizon. The derived signal is fed to a radio transmitter on the cutter head |
| 4175933 |
Dust filter apparatus |
November 27, 1979 |
| Dust filter apparatus includes a filter panel and a nozzle spraying liquid into the gaseous flow upstream of the filter panel which comprises a plurality of layers each extending across the gaseous flow duct and at least alternate layers defining at least portions of passageways for |
| 4175649 |
Conveyor drives |
November 27, 1979 |
| The drive mechanism is installed intermediate a motor and a conveyor drive and comprises a clutch arranged between the driving section and the driven section and a brake arranged to stop the driven section. A pump is drivably connected to the driven section and feeds fluid pressure via a |
| 4160391 |
Auxiliary drive mechanism |
July 10, 1979 |
| An auxiliary drive mechanism for use in association with a hydraulically actuated clutch has a gear wheel attached to the driven or output stage of the clutch, and a drive motor driving a pinion meshing with an intermediate gear. The intermediate gear protrudes into the casing which |
| 4155594 |
Method of and apparatus for steering a mining machine |
May 22, 1979 |
| A method of steering a mineral mining machine so as to remain in the mineral seam. Natural radiation from rock strata adjacent to the mineral seam is sensed and the machine is steered from the intensity of radiation so that a residual layer of mineral left by the machine which attenuates |
| 4155436 |
Control means for drive equipment |
May 22, 1979 |
| The circuit, which controls actuation of a clutch intermediate an electrical motor and a conveyor, is powered from a transformer which taps the power supply to the motor. The circuit contains a relay switch which is operable by a current sensor attached to the power supply line. |
| 4153375 |
Method of agitating slurries |
May 8, 1979 |
| An apparatus for agitating a slurry to increase its settling rate has at least one fluid inflatable container capable of being inflated and deflated, which is immersed in the slurry, and a control to feed the container with fluid to inflate it, and to interrupt the feed during deflat |
| 4151901 |
Brake shoe mounting arrangement |
May 1, 1979 |
| Brake equipment comprising a brake shoe arrangement including a brake pad and a curved vane wherein the brake shoe arrangement is constrained by the curved vane to rotate about its center of mass only. The brake equipment mitigates problems associated with uneven wear of the brake pad re |
| 4150403 |
Circuit arrangements for calibrating signals |
April 17, 1979 |
| A circuit arrangement for calibrating a signal by calibrating a storage medium upon which the signal is recorded comprising circuits for producing calibration signals and for interfacing information, calibration and marking signals, a timing and control circuit for controlling periods of |
| 4146576 |
Manufacture of carbon fibres |
March 27, 1979 |
| The invention relates to an improvement in a process for the production of carbon fibres (also filaments and films) from organic material consisting mainly of hydrocarbons (e.g., pitch, tars, solutions or extracts of coal). The organic material is spun or extruded to form a fibre, oxidiz |
| 4138010 |
Controlled bunker systems |
February 6, 1979 |
| An automatically controlled bunker system includes a plurality of sensor means for sensing various operational conditions within the bunker system and for deriving signals indicative of the sensed operational conditions. The derived signals are fed to control means which control operatio |
| 4136910 |
Excavating machines |
January 30, 1979 |
| The excavating machine has a cutter carrying boom carried by a boom support member which can be swung about an axis extending in the direction of the roadway. The machine includes a cutter unit and a stay unit each of which is releasably anchorable in the roadway and each of which can be |
| 4130319 |
Mining machines |
December 19, 1978 |
| A longwall mining machine is provided with a roller resiliently urged into engagement with a track extending along the longwall face. Sensor means are provided to sense rotation of the roller and derive a signal indicative of the machine's position along the longwall face. |
| 4125334 |
Apparatus for mixing two flowable substances |
November 14, 1978 |
| An apparatus for mixing two flowable substances, such as flocculent and water, comprises a first container into which a first flowable substance is fed and from which the first substance overflows onto an inclined face, the second flowable substance being fed into a second container from |
| 4125178 |
Drive mechanism |
November 14, 1978 |
| An auxiliary drive is provided for a drive mechanism for a conveyor, the mechanism including a brake and clutch arrangement designed to facilitate the starting and stopping of the conveyor. The auxiliary drive is conveniently mounted on the mechanism and has a drive motor driving a gear |
| 4122332 |
Bunker contents indication equipment |
October 24, 1978 |
| A transducer for indicating the percentage filling of an underground mine storage bunker. The contents of the bunker is proportional to the rotation of a shaft of a conveyor which feeds it. The transducer comprises a shaft encoder for sensing this rotation and derives a signal indicative |
| 4120164 |
Underground roadway or tunnel support |
October 17, 1978 |
| A method and apparatus is provided for supporting an underground mine roadway or tunnel having a series of spaced rigid support members installed along the roadway or tunnel, the rigid support members being erected in turn adjacent to newly exposed mine or rock surface as the roadway |
| 4119525 |
Manufacture of coke |
October 10, 1978 |
| A low-impurity coke suitable for the production of electrodes for aluminium manufacture is prepared by extracting coal volatile matter content greater than about 28% by weight on a dry ash free basis with a highly aromatic hydrocarbon extractant of which the middle 90% boils in the range |
| 4114429 |
Method of and apparatus for sensing strain in strained members |
September 19, 1978 |
| The strain in a member is sensed by a strain sensitive device mounted on mounting block means which when fixedly secured to the member include a removable template. |
| 4111709 |
Lute |
September 5, 1978 |
| A lute for coke ovens and the like is of clay-like consistency and contains a blowing agent which produces gas at least within the temperature range 160.degree. to 290.degree. C, and can appreciably cut pollution. |
| 4111487 |
Underground mining machine with longwall guidance system |
September 5, 1978 |
| A signal derived from means, e.g. a gyroscope, mounted on the machine is used to guide a shearer drum along a straight path, the shearer being mounted on an underframe including two pivotally connected parts. |
| 4108760 |
Extraction of oil shales and tar sands |
August 22, 1978 |
| This invention relates to the extraction of oil shales and tar sands by using a solvent under supercritical conditions at a temperature within 200.degree. C. or its critical temperature in order to effect extraction of kerogen from the sand or shale.In the case of shales considerable hea |
| 4107516 |
Pulse counting apparatus for measuring mechanical movement of a machine such as a mining machine |
August 15, 1978 |
| Pulse Counter means adapted to determine the position of a mining machine including a rotary member. The pulse counter means includes an arrangement of phototransistors and photodiodes which is adapted to derive electrical pulse signals in response to movement of the rotary member thereb |
| 4105419 |
Fluidized bed apparatus |
August 8, 1978 |
| A fluidized bed apparatus suitable for the combustion of fuel has a baffle assembly arranged in the freeboard above the fluidized bed level. The assembly is in the form of a perforate duct which defines within it a passage connecting with the gas exit of the apparatus. Gases issuing from |
| 4101413 |
Extraction of coal |
July 18, 1978 |
| Coal can be extracted with high boiling aromatic oils produced by extracting the aromatic constituents of a heavy petroleum material, e.g. a bitumen residue, using a selective solvent, mixing the extract with a low-boiling aromatic solvent, adding water and separating the aromatic-co |
| 4101173 |
Roof prop and platform movably mounted on boom of tunnelling machine |
July 18, 1978 |
| A mineral mining machine of the type having a boom-mounted cutter assembly carried by a mobile base unit is provided with a face support structure which is pivotally mounted on the boom. Fluid operable rams are provided for moving the structure between a stowed position lying adjacent th |
| 4096940 |
Conveying apparatus |
June 27, 1978 |
| Packing paddles for conveying and packing broken rock and debris in a mine are pivotally mounted on mine roof supports. Hydraulic sequence valves are employed to operate hydraulic rams controlling the paddles. The valves, and thus the paddles, are operated in sequence to convey the debri |
| 4096753 |
Mine equipment |
June 27, 1978 |
| Mine equipment for measuring conveyor advance includes two roof support assemblies and control means to ensure each of the assemblies can be advanced only when the other assembly is anchored. The two assemblies are linked by a transducer which senses movement of one of the assemblies |
| 4095434 |
Mine equipment |
June 20, 1978 |
| An elongated frame provides a track over a mining machine for a carriage which is hauled along by an endless chain. The carriage carries assembled crown roof support sections to adjacent the newly exposed rock boundary. |
| 4093309 |
Method of and apparatus for controlling advance of underground armored conveyors |
June 6, 1978 |
| In controlling advance of an armoured conveyor in an underground mine, detector means detect the advance of different conveyor sections and control means control current and/or subsequent advances of the conveyor in relation to the detected advances. |
| 4088370 |
Haulage arrangements for mineral mining machines |
May 9, 1978 |
| A longwall mining machine traverses to and fro along an articulated track assembly which includes an armoured face conveyor and which is engaged by a driven pinion on the machine body to haul the machine along its path. |
| 4080350 |
Damp proof compositions |
March 21, 1978 |
| The invention discloses a novel damp proof composition, suitable for making into sheets for roofing purposes, comprising (a) from 5 to 40% of a polychloroprene rubber, (b) pitch in an amount of up to 45%, and (c) at least 5% of a filler. The filler may be particulate or fibrous, and the |
| 4072349 |
Steering of mining machines |
February 7, 1978 |
| A mineral mining machine which wins a strip of mineral by separate roof and floor cutting stages comprises steering apparatus which senses the cutting horizon associated with one cutting stage to control the cutting horizon associated with the other cutting stage. |
| 4070575 |
Measurement of flow of particulate material by sensing the shadow profile |
January 24, 1978 |
| A portion of a beam of light directed towards a flow of particulate material is interrupted with an edge such that the edge casts a shadow across the material. The shadow profile is sensed and a signal indicative of the sensed shadow profile is derived and monitored as a function of |
| 4069676 |
Mine packing equipment |
January 24, 1978 |
| Equipment for retaining flowable material within a packhole has two connected sections defining two boundaries of the packhole. The sections comprise a base and a roof engaging assembly for engaging the mine roof. Each section has a flexible sheet connected to the base and roof assembly. |
| 4068088 |
Underground mine equipment |
January 10, 1978 |
| An underground mine cable handler comprises two parallel ropes hauled behind the mining machine, a series of box like elements being threaded on the ropes to provide a protective corridor for at least one supply cable and/or hose for the machine. |
