Abstract: This invention provides a device for keeping a stringed musical instrument, such as a guitar, in tune while playing same with the use of a capo. The device comprises a bar of lightweight molded plastic material or the like having a bevel on one side and a hook end at the top. The device is positioned whereby the hook end is over the top portion of a guitar neck and the beveled side is under the strings on a fret. The string clamp portion of a capo is placed over the device after it is positioned. The device in place prevents the strings from stretching which would cause the guitar to get out of tune if the device was not in place.

Abstract: A magazine entrance guide integral with the mainspring housing of the firearm is provided. It is a guide having four sloped surfaces front, back and two opposite sides guiding double column staggered round high capacity magazine entrance during insertions. The magazine entrance guide with widely spaced sides in one embodiment has upwardly extended opposite side stabilizing extensions enclosing opposite sides of the gun butt within opposite side grip plates that counter torsion forces between the guide and the mainspring housing. In another embodiment opposite side stabilizing extensions are positioned within the angled out opening sides of the gun butt magazine opening to counter torsion forces between the guide and the mainspring housing.

Abstract: A hitch apparatus having a modular configuration for mounting to a vehicle, in order to conveniently hitch a trailer thereto. The modular hitch apparatus has movable structure that is configured for selectively tilting a trailer with respect to the vehicle so as to facilitate loading and unloading equipment, automobiles, materials, etc., onto or off of the trailer. The hitch apparatus includes an elongated chamber-like structure that has an open top and an interior which is in communication with the open top. The chamber-like structure may be configured to be anchored to the frames of a variety of vehicles including conventional pickup trucks, cars, etc. The chamber-like structure is sized and configured in the manner of a conventional pickup truck bumper. The apparatus further includes an engageable member such as a ball hitch movably connected to a structural trailer part (e.g. a trailer hitch socket).

Abstract: Apparatus and method for obtaining from a well drilled into the subsurface of the earth the information necessary to determine the location of the liquid surface in same. A source of pressure pulses is coupled to the well surface casing in order that the pulses are transmitted downhole where they are reflected by all surfaces present therein such as, the liquid surface, tubing collars and tubing anchors. A transient pressure transducer is provided which generates an electrical output in response to all reflections of the transmitted pulse. All of the reflections occurring in the well are recorded for a sufficient amount of time to ensure the recording of the first reflection from the liquid surface present in the well.

Abstract: The present invention relates to an improved process for the solution mining of a mineral from a subterranean formation. More specifically, the invention relates to an improved process which enhances significantly the recovery of a mineral from a subterranean formation via solution mining. The improvement comprises periodically ceasing injection of leach solution while continuing production to alter the path of flow of the leach solution between an injection well and a production well and subsequently injecting leach solution.

Abstract: A method whereby the potential of coal having a sodium content high enough to foul coal burning equipment is significantly reduced. The method comprises selectively crushing the coal and separating it according to particle size into low and high potential fouling fractions and recovering a sodium containing coal having a low potential for fouling coal-burning equipment.

Abstract: The present invention relates to a method for the renovation of an aquifer subsequent to the solution mining of a mineral from the aquifer. More specifically, the invention relates to the utilization of spent ion exchange resin to remove chloride ions from the aquifer.

Abstract: The present invention relates to an improved method for the solution mining of a mineral from a subterranean formation. More specifically, the invention relates to an improved method which enhances significantly the recovery of the mineral from a mature subterranean formation via solution mining. The improvement comprises increasing the flow rate of leachant into the formation by at least a factor of two.

Abstract: Method for preparing natural gas having a high carbon dioxide, ethane and propane content to meet sales gas specifications, such as BTU requirements. The gas is prepared by cooling, followed by contacting with at least one physical solvent which has a greater affinity for heavier hydrocarbons and carbon dioxide than for methane, ethane, propane and butane. Ethane, propane and butane separated by the initial cooling are selectively recombined with the gas after solvent contact.

Abstract: The present invention relates to an improved method for the solution mining of a mineral from a subterranean formation. More specifically, the invention relates to an improved method which enhances significantly the recovery of the mineral from a subterranean formation via solution mining by reducing the oxidant consuming reactions which compete with the mineral for the oxidant injected therein.

Abstract: The present invention relates to an improved method for the solution mining of a mineral from a subterranean formation. More specifically, the invention relates to an improved method which enhances significantly the recovery of a mineral from a subterranean formation via solution mining by increasing the rate of reactant flow through the formation via improved formation permeability and thereby reducing the time necessary to recover the mineral values therefrom.

Abstract: A method of inhibiting the spontaneous combustion of coal which comprises treating coal with carbon dioxide to deactivate the surface of the coal to oxygen.

Abstract: A photovoltaic device composed of a luminescent sheet having a pair of flat, opposed semicircularly shaped sides connected by a thin edge face having a curved, semicylindrically shaped section and a straight section and at least one photovoltaic cell carried on the straight section of said thin edge face.

Abstract: A process for preparing a coal or lignite fuel that contains sulfur for combustion wherein reduced amounts of sulfur-containing air contaminants are emitted from the combustion. In the disclosed process, the coal or lignite that contains sulfur is pulverized, deeply cleaned, mixed with a finely divided inorganic material, and then formed into briquettes or pellets.

Abstract: A method of inhibiting the spontaneous combustion of coal char which comprises treating coal char with air following by carbon dioxide to deactivate the surface of the coal char to oxygen.

Abstract: An improved process for preparing a coal or lignite fuel that contains sulfur for combustion wherein reduced amounts of sulfur-containing air contaminants are emitted from the combustion. In a process whereby coal or lignite that contains sulfur is pulverized and subsequently mixed with a finely divided inorganic material, the improvement comprises precipitating the inorganic material onto the pulverized coal to achieve greater absorbency of SO.sub.2 emissions upon combustion of the coal. The inorganic material can be at least one of the oxide, hydroxide or carbonate of sodium, potassium, calcium or barium; or it can be dolomite.

Abstract: The present invention relates to a method for the restoring of an underground reservoir subsequent to the solution mining of a mineral from a subterranean formation. More specifically, the invention relates to the cycling of clean water through a subterranean formation to decrease the total dissolved solids level of the reservoir present therein.

Abstract: The present invention relates to a method for the solution mining of a mineral from a subterranean formation. More specifically, the invention relates to a method which enhances significantly the recovery of a mineral from a subterranean formation via solution mining utilizing an oxidant and leach solution with an injection and production well. The method comprises ceasing oxidant injection via the injection well and measuring the change in mineral concentration in the pregnant solution recovered via the production well.

Abstract: The present invention relates to a method for the restoring of an underground reservoir subsequent to the solution mining of a mineral from a subterranean formation. More specifically, the invention relates to the introduction of a sulfate reducing bacteria into a subterranean formation to decrease the total dissolved solids level of the reservoir present therein.

Abstract: The present invention relates to an improved method for the solution mining of a mineral from a subterranean formation. More specifically, the invention relates to an improved method which enhances significantly the recovery of a mineral via solution mining with an injection and production well from a subterranean formation which contains the mineral in a zone of low permeability having a zone of higher permeability both above and below it. The improvement comprises locating an injection well in one zone of high permeability and a production well in the other zone of high permeability.