| Patent Number |
Title Of Patent |
Date Issued |
| D251442 |
Casualty recovery unit |
March 27, 1979 |
|
| 5380563 |
Ceramic welding |
January 10, 1995 |
| In a ceramic welding process a composition of matter therefore includes a mixture of refractory particles and oxidizable metal particles wherein the harmonic mean size of the refractory particles is between 300 and 1000 microns, and the size range spread factor of the refractory particle |
| 5345685 |
Strata movement indicator |
September 13, 1994 |
| A strata movement indicator includes at least two lengths of suspension wire respectively for remote and near anchors locatable in the same borehole. Each wire carries a cylinder provided with indicator markings, the cylinders being moveable with respect to one another and to a refer |
| 5283914 |
Protective helmets |
February 8, 1994 |
| A protective helmet incorporates a visor retractable therewithin, a fan for providing filtered airflow through a duct within the shell to the visor, and ear defenders mounted substantially within the profile of the shell. |
| 5158341 |
Method of steering a mining machine |
October 27, 1992 |
| A method of steering a double-ended ranging drum type mining machine. The method includes the steps of positioning a first current cut follower at or substantially adjacent the center of the machine. A second previous cut follower is positioned at or substantially adjacent the center of |
| 5013157 |
Apparatus for producing aerated cementitious compositions |
May 7, 1991 |
| An aerated cementitious composition is produced by feeding a mixture comprising cement and foaming agent to a mixing chamber open to atmosphere together with a feed of liquid. The ingredients are mixed and the wetted mixture pumped to a desired site, the capacity of pumping being greater |
| 4976495 |
Method and apparatus for steering a mining machine cutter |
December 11, 1990 |
| The trailing drum of a double-ended ranging drum shearer is steered in a seam by producing an algorithm which determines, as a result of information derived from signals from the machine dependant on its tilt, direction and amount of movement along a face being cut. The height of the |
| 4914432 |
Apparatus for locating a member in a borehole |
April 3, 1990 |
| Geophone detectors are spaced along a long borehole in a mineral seam by pumping grout from a grout tank into a breech assembly and selectively passing the detectors from the breech assembly through gate valves and into a drill string inserted in a borehole. The detectors are connected b |
| 4913499 |
Equipment and method for measuring convergence |
April 3, 1990 |
| A transducer is placed in a telescopic strut and connected to a roof cam and a floor cam. The cams are pivoted to a roof support and a constant load is applied to the cams by a gas spring. As convergence takes place a transducer in the telescopic strut records the relative movement betwe |
| 4907964 |
Device for extracting and burning methane |
March 13, 1990 |
| Apparatus for extracting and burning methane gas from a landfill refuse site comprises a first venturi to which is fed compressed air. The venturi is connected to a well in the site and acts to draw methane from the well. The methane/air mixture is fed to a second venturi for enrichment |
| 4887336 |
Conveyor belt clamp |
December 19, 1989 |
| A conveyor belt clamp is made up of a pair of parallel plates which hold a belt between them. Tension is applied by a tensioning bar which is fixed across arms attached to and projecting outwardly from each plate. A hydraulic ram applies the tension and the plates bow centrally towards t |
| 4879695 |
Method of locating a member in a borehole |
November 7, 1989 |
| Geophone detectors are spaced along a long borehole in a mineral seam by pumping grout from a grout tank into a breech assembly and selectively passing the detectors from the breech assembly through gate valves and into a drill string inserted in a borehole. The detectors are connected b |
| 4874512 |
Filter press cloth hanger |
October 17, 1989 |
| A filter press cloth hanger for a filter press comprising two arms joined at their upper ends by a pivot bolt which extends through platelike members welded to the tops of the arms. Each arm is similar in construction and comprises the hollow tubular outer wall in which slides a spri |
| 4869591 |
Method of optically measuring relative angular movement |
September 26, 1989 |
| Relative angular movement between two linear members is detected by shining light from a light source (11) through a triangular mask (12) in one member onto a mirror (10) in the other member and reflecting the image of the triangular mask onto a linear array of detectors (15). Movement |
| 4792802 |
Telemetry system for borehole drilling |
December 20, 1988 |
| A telemetry system for borehole drilling comprises an effectively continuous length of hardwire cable which extends along a drill string located in a borehole between electrical signal control, indication equipment situated outside the borehole and probe means situated within the bor |
| 4783254 |
Cyclone separator means |
November 8, 1988 |
| Cyclone separator for treating granular solid material to derive separate fractions of different densities, comprise a treatment chamber divided into first and second treatment compartments. A relatively more dense fraction of material is fed via interconnected outlet from one treatment |
| 4777349 |
Electrode sensor apparatus and method of operating the same |
October 11, 1988 |
| In an instrument used to measure x-rays of the kind in which a wire anode operates in a gaseous atmosphere in a sealed housing to detect x-rays, the instrument is rejuvenated by passing a heating current through the anode to raise its temperature for a period of between two and six hours |
| 4760513 |
Resultant velocity control for members capable of being driven in two component directions simul |
July 26, 1988 |
| A method of and apparatus for controlling the resultant velocity of a member is provided, the resultant velocity being derived by driving the member in two component directions, simultaneously. First sensor means derive a signal indicative of the resultant velocity, the derived signal |
| 4735708 |
Cyclone separator means |
April 5, 1988 |
| Cyclone separator for treating granular solid material to derive separate fractions of different densities, comprise a treatment chamber divided into first and second treatment compartments. A relatively more dense fraction of material is fed via interconnected outlet from one treatment |
| 4722574 |
Personnel detection and protection systems for use in underground mines |
February 2, 1988 |
| A personnel detection and protection system comprises sensor means for detecting the presence of personnel in a prohibited operational zone, and for deriving signal means indicative of such a detected presence, and control means responsive to the deriving of such signal means to control |
| 4704793 |
Collar splitters for lock bolt fastening systems |
November 10, 1987 |
| A collar splitter for a lock bolt fastening system comprising a body having a partly tapered passage, a draw rod component slidable within the passage, and a cutter blade arrangement pivotally mounted on the draw rod component. A toggle link arrangement ensures that when the collar split |
| 4697190 |
Borehole located directional antennae means for electromagnetic sensing systems |
September 29, 1987 |
| A directional antenna for an electromagnetic sensing system comprises a generally cylindrical tube of electrically-conductive material a portion of the tube being cut away to define a transversally-facing window. The non-cut away portion of the tube provides a backing shield for a pair o |
| 4660985 |
Methods for producing aerated cementitious compositions |
April 28, 1987 |
| An aerated cementitious composition is produced by feeding a mixture comprising cement and foaming agent to a mixing chamber open to atmosphere together with a feed of liquid. The ingredients are mixed and the wetted mixture pumped to a desired site, the capacity of pumping being greater |
| 4653031 |
Mapping faults in a geological seam |
March 24, 1987 |
| An area of a seam is defined and a series of shot locations and detectors are arranged along one side of the area to determine reflected signals. Transmitted signals are also received from a line of shot locations on the other side of the area. The signals received are processed accordin |
| 4636227 |
Monitoring by adsorption |
January 13, 1987 |
| A passive monitor for very low concentrations of organic contaminant vapors in an atmosphere uses a holder having a first sampling chamber exposable to the atmosphere and a second desorption chamber and a charge of adsorbent. In one position of the holder, the adsorbent occupies the |
| 4635629 |
Breathing apparatus |
January 13, 1987 |
| Breathing apparatus of the closed- or semi-closed-circuit type includes a carbon dioxide absorber (8) which creates troublesome heat in operation. Apparatus giving acceptable breathing gas temperature incorporates an evaporative cooler unit (20), and a pump utilizing the diaphragn plate |
| 4630057 |
Vehicle location system |
December 16, 1986 |
| A leaky-feeder or other form of guided radiocommunication system serving a linear route or track is equipped at intervals with static marker devices which successively modify a radio signal passing those points between a fixed base station and a personal or mobile station travelling the |
| 4624574 |
Apparatus for producing aerated cementitious compounds |
November 25, 1986 |
| An aerated cementitious composition is produced by feeding a mixture comprising cement and foaming agent to a mixing chamber open to atmosphere together with a feed of liquid. The ingredients are mixed and the wetted mixture pumped to a desired site, the capacity of pumping being greater |
| 4616513 |
Dust collection |
October 14, 1986 |
| A sampler for "total dust", exhibiting inspirability characteristics similar to the human head, has a filter unit containing a filter. The capsule has a lipped entry which protrudes through an aperture in a sampling head. The sampling head is connectd to suction elements for drawing |
| 4612405 |
Continuous sorption process |
September 16, 1986 |
| A process providing continuous or quasi-continuous sorption uses at least three fixed bed sorbent zones connectable in series by pipes, for the passage of a liquid phase containing a component to be sorbed. The approach of saturation of one or more of the zones is detected, e.g., usi |
| 4596233 |
Solid fuel combustion equipment |
June 24, 1986 |
| Solid fuel combustion equipment in the form of a grate assembly comprises longitudinally extending support elements on which are mounted laterally orientated grate bars. The support elements are pivotable about their horizontal axes and are provided with sealing means at their adjacent |
| 4587852 |
Conveyor belt tension sensing |
May 13, 1986 |
| The tension of a conveyor belt having at least one connection joint including joint components provided on the ends of both connected belt portions is sensed by mounting a tensile force sensor between the joint components and deriving a signal indicative of the sensed tension. The de |
| 4586389 |
Dust detection |
May 6, 1986 |
| A portable aerosol dust spectrometer has an inlet section with a sampler entry having an entry efficiency for airborne dust approximately to that of the human head during inhalation, a clean-up stage to remove particles above 15 .mu.m and a main collection stage which is a cascade impact |
| 4585466 |
Cyclone separators |
April 29, 1986 |
| An improved cyclone separator comprises a body defining a main vortex chamber having an inlet and a fluid outlet. A secondary vortex chamber communicates with and opens into the main vortex chamber. |
| 4584948 |
Combustors |
April 29, 1986 |
| A combustor for burning a feedstock includes a cylindrical body having a tangential feedstock inlet and an exhaust outlet. A catchment chamber of hollow cylindrical form intersects the wall of the body and opens into the cavity to provide a common boundary. Swirling or vortical flow is c |
| 4577009 |
Polyimide product from phenanthrene |
March 18, 1986 |
| Novel polyimide products of the general formula ##STR1## where n is from 2 to 20 and each R is hydrogen or a group effective to block further reaction with a diamine. These products are incapable of further polymerization with diamines, but are useful starting materials for react |
| 4568128 |
Rotary cutter heads for mineral mining machines |
February 4, 1986 |
| A rotary cutter head for a mining machine is provided with a plurality of cutter tools mounted on an annular end component which defines the end of the cutter head remote from the mining machine. Ventilating means are provided comprising air flow guide passages having air flow inducing s |
| 4562165 |
Regenerating sorbents |
December 31, 1985 |
| Sorbents used for drying organic liquid process streams can be regenerated by passing an organic liquid carrier solvent such as n-octanol therethrough at a temperature sufficient to dissolve water trapped in the sorbent, thus regenerating it, and subsequently cooling the organic liquid |
| 4555933 |
Dust assessment apparatus and method |
December 3, 1985 |
| A gas containing dispersed particles with differing electrostatic charges is drawn through a gas channel between opposite charged plates before being split into equal gas flows by a flow divider. The equal gas flows leave the apparatus through exits which can be connected to a particle |
| 4545621 |
Mining installation equipment |
October 8, 1985 |
| Services, such as electricity and water, are supplied through conduits to moving machinery such as a longwall mining machine which moves along a conveyor or other fixed path. A channel having an open mouth which is flexibly sealed is disposed alongside the path and contains supply co |
| 4541913 |
Process for hydrocracking supercritical gas extracts of carbonaceous material |
September 17, 1985 |
| The present invention relates to a process for hydrocracking SGE of carbonaceous material to produce light distillate, including chemical feedstocks and transport fuels.A mixture of crushed coal and a solvent is fed to an extractor 1 wherein the solvent is heated and pressurized to form |
| 4533180 |
Fluid supply system for rotary cutter heads for mining equipment and to mining machines comprisi |
August 6, 1985 |
| A fluid supply system for a rotary cutter head of mining machines comprises a plurality of nozzles for directing air flow inducing sprays in the vicinity of the cutter head, and sensor means for sensing a preselected operational condition of the fluid supply to the nozzles and for derivi |
| 4531782 |
Mining equipment |
July 30, 1985 |
| Mining equipment for steering the cutting horizon of a mining machine cutter which is mounted on a ranging arm and which in use makes repeated traverses along the working face, comprises a boom urged into contact with the mine roof formed on a previous traverse of the machine. The boom i |
| 4528107 |
Froth flotation |
July 9, 1985 |
| Minerals, especially coals for power generation, can be subjected to froth flotation using as a collector a liquid which contains at least 21% aromatics or at least 41% naphthenes. Improvements in froth yield and ash-in-tailings compared with commercial products are demonstrated. |
| 4526767 |
Process for the production of ZSM-5 zeolite |
July 2, 1985 |
| Catalysts of the ZSM-5 synthetic zeolite type can be prepared by heating a mixture of a precursor for an alumina hydrate, a precursor for silica hydrogel, an alkali metal hydroxide and water together with an organic templating agent selected from the group of carboxymethylcellulose, the |
| 4521291 |
Coal extraction |
June 4, 1985 |
| Coal is extracted using a mixed solvent which includes a substantially aromatic component and a substantially naphthenic component, at a temperature of 400.degree. to 500.degree. C. Although neither component is an especially good solvent for coal by itself, the use of mixed solvent |
| 4521058 |
Rotary cutter heads for mining machines |
June 4, 1985 |
| A rotary cutter head for a mining machine comprises a hub assembly drivably mounted on a drive section of the mining machine and a barrel component secured around and co-axial with the hub assembly, the barrel component supporting cutter tool-carrying loading vanes. Ventilation means pro |
| 4520740 |
Combustion and heating equipment |
June 4, 1985 |
| Combustion and heating equipment includes a body with an underfeed stoker located in the lower part thereof. A jacket surrounds the body to define a heating space, different parts of which are interconnected by triangular ducts disposed in the gas pass. A screwfeeder is provided for the |
| 4516807 |
Fluid supply systems for rotary cutter heads for mining machines and rotary cutter heads compris |
May 14, 1985 |
| A rotary cutter head drivably mountable on a rotary drive shaft of a mining machine comprises a hub assembly drivably mountable on the drive shaft and a barrel component secured around the hub assembly. Ventilating means comprising tubular elements are mounted within the barrel component |
| 4502940 |
Method for extracting caking coals |
March 5, 1985 |
| Caking coals can be solvent extracted in high yields without agglomeration by a first stage extraction of 380.degree. C. to 420.degree. C. and at a pressure above the critical pressure of the solvent, followed by a second stage at a temperature above the critical temperature of the solve |
