Abstract: A method is provided for reducing the concentration of radioactive materials or other trace contaminants in fluids withdrawn from subterranean reservoirs and also fluids in reservoirs. The method involves deposition of sorbent solids including, but not limited to, fine ion exchange resins, within the reservoir matrix surrounding a production well to act as an in-situ filter for dissolved radionuclides or other contaminants present in reservoir pore waters. For this purpose, the sorbent solid is either a) precipitated within the reservoir matrix by the reaction of ions or molecules of two or more carrier solutions or b) directly introduced into the reservoir as a solid component of a solid-liquid slurry using high-pressure injection techniques.

Abstract: An associated memory structure having a plurality of memories amenable for testing and a method of testing the memories is provided. First and second memories are formed, wherein data in the first memory provides a basis for at least a portion of the input to the second memory during functional operation of two memories. Preferably, an output latch for receiving the output test data from the first memory is provided. Means are provided for loading the first memory with data which is utilized as a basis for providing at least a portion of the input to the second memory. An access path from the output port of the first memory to the input port of the second memory allows use of the data in the first memory to generate at least a portion of the input to the second memory. The first memory is first tested independently of the second memory. Thereafter, the first memory is loaded with preconditioned data that is used as a basis for inputs to the second memory during testing of the second memory.

Abstract: The present invention, provides a single BIST which can test various memories of different sizes, types and characteristics by using a state machine to select and generate all patterns required for testing all of the memories on the chip, and impressing all of the data, including expected data, and address information on all of the memories simultaneously. The BIST also generates unique (separate) control signals for the various memories and impresses these control signals on the various memories. The BIST selectively asserts the various control signals so as to apply (write) the data and to read and capture (load result) failure information only to/from those memories whose unique controls are asserted.

Abstract: A method is provided for reducing the radioactive material content of fluids withdrawn from subterranean reservoirs. The method involves deposition of sorbent solids within the reservoir matrix surrounding a production well to act as an in-situ filter for dissolved radionuclides present in reservoir pore waters. For this purpose, the sorbent solid is either a) precipitated within the reservoir matrix by the reaction of two or more carrier solutions or b) directly introduced into the reservoir as a solid component of a solid-liquid slurry using high-pressure injection techniques. Thereafter, fluids produced by the well contain significantly lower concentrations of radionuclides (e.g., principally radium and uranium ions), as radionuclides are removed from the inflowing reservoir fluids by means of ion exchange, adsorption, chelation, chemisorption, or coprecipitation with the in-situ filter medium.

Abstract: A drive mechanism for a boat having the motor located inboard. The mechanism disclosed includes a gearbox located outboard of the transom with an input shaft extending toward the inboard motor and an output shaft extending aft toward a propeller shaft. A univerasl joint coupling is provided to drive the propeller shaft while a gimbal ring is employed to universally mount a propeller shaft housing such that the propeller may be used for steerage as well as forward thrust. The gearbox is disclosed as including a first gear pair capable of being changed to provide different output ratios. A second drive link in the gearbox gives a selection of directions of rotation of the propeller shaft. In a first instance, a gear pair is employed. In a second instance, a chain drive is employed. Access is provided into the gearbox by a plate located between the gearbox and the transom. This plate provides a mounting for the drive links within the gearbox.

Abstract: Sunvisors provided with vanity mirrors usually have the mirror, with or without illumination, fixed to the upper surface of the visor when in the stowed position, and to avoid undesirable reflections a cover is sometimes provided. Also, various switches are provided to control energization of the lighting means when present. The invention simplifies this kind of visor by arranging that the mirror is carried by a hinge (7b) near the lower margins of the visor to open out therefrom downwardly from a stowed position facing into a recess (11) in the upper surface of the visor. The lower edge of the visor may be relieved as at (12) to maximize the hingeing angle of the mirror so as to achieve compactness while satisfying visor safety requirements. The wire frame (7) of the visor may be joggled inwards at (7a) and (8a) to provide hinge pins and electrical connections (7b) and (8b) for the visor.

Abstract: A hinge mechanism including a sleeve member having an inwardly facing bearing surface and a rod member dimensioned to fit in the sleeve member in engagement with the bearing surface. The sleeve member is resiliently flexible but substantially inextensible and has at least one recess formed in its bearing surface, the rod member being provided with a projection shaped to be engageable in the recess. The rod member is an interference fit in the sleeve member with the projection located in the recess and the rod member is rotatable in the sleeve member by causing only resilient deformation of the latter.

Abstract: A drive mechanism for a boat having the motor located inboard. The mechanism disclosed includes a gearbox located outboard of the transom with an input shaft extending toward the inboard motor and an output shaft extending aft toward a propeller shaft. A universal joint coupling is provided to drive the propeller shaft while a gimbal ring is employed to universally mount a propeller shaft housing such that the propeller may be used for steerage as well as forward thrust. The gearbox is disclosed as including a first gear pair capable of being changed to provide different output ratios. A second drive link in the gearbox gives a selection of directions of rotation of the propeller shaft. In a first instance, a gear pair is employed. In a second instance, a chain drive is employed. Access is provided into the gearbox by a plate located between the gearbox and the transom. This plate provides a mounting for the drive links within the gearbox.

Abstract: A mirror made of a synthetic plastics material in the shape of a shallow tray having a base which is metallized on its internal or external surface. The shallow tray has a rim integral with the periphery of the base. The shape of the cross-section of the rim enables the peripheral edge at the front of the mirror to be convexly rounded to a required radius greater than the thickness of the base. The shape of the cross-section of the rim also serves to hold the base from distortion and so maintains the optical properties of the mirror.

Abstract: A mirror assembly comprising a shallow dish-like housing containing at least one pair of elongate conductors together defining an electrically-conductive seating for at least one electric lamp to be mounted therebetween within the housing, the conductors extending with the interior of the housing to terminal connectors, whereby connection to an electrical supply externally of the housing can be effected, a frame or bezel detachably secured around the periphery of the housing and defining a first aperture closed by a mirror facing outwardly of the housing and at least one second aperture containing a lens through which light from the or each lamp, when energized, will be so directed as to illuminate a region in front of the mirror. The mirror is spaced from the base of the housing and the rear surface of the mirror.

Abstract: An input video signal is coupled to one input of a summing amplifier, to the input of a low-pass filter, and to one input of a movement detector. The output signal from the apparatus is delayed by one frame interval, and this delayed output signal is coupled to a second input of the summing amplifier and to a second input of the movement detector. The movement detector is of a type which generates a control signal to indicate movement in response to a plurality of frame-to-frame differences for adjacent picture elements. This control signal is utilized to selectively gate either the output from the summing amplifier or the output of the low-pass filter through to an output terminal.