Abstract: A dental implant system for providing a progressively tightening anti-rotational connection between a post and a socket. Engagement means on the post and/or socket provide for a small degree of relative rotation between the post and socket upon initial connection, then a progressively tightening connection upon further penetration of the post into the socket and then a final connection which substantially eliminates the relative rotation between the post and socket.

Abstract: A drive gear unit is provided for tilting vertically orientated slats of a vertical blind system. The unit includes a frame and a connection element for connecting the frame to a tubular support rail for a vertical blind system. The unit further includes a wand drive member having a shaft and a first spur gear wheel provided on the shaft so that the shaft for operative connection to a wand, the first spur gear having teeth which extend radially outwardly from a central hub. A rod locating member is associated with the frame and has a passage for locatingly receiving the vertical blind drive rod. A rod drive member has a rod connecting part adapted to be operatively joined to the vertical blind drive rod, and further has a second spur gear wheel joined to the rod connecting part. The second spur gear wheel has teeth which extend radially outwardly from a central hub. The first spur gear wheel and the second spur gear wheel are in operative mesh.

Abstract: A set of dental impression components that may be used for either pick-up type (open tray) or transfer type (closed tray) impression molding techniques. The components are used with an impression material to fabricate a model at a site in a jawbone where an implant has been osseointegrated. The impression components include an impression coping having an outer surface with its bottom end configured to reside below the gingiva surrounding the implant. A passage exists through the impression coping which accepts a first component for attaching the impression coping to the implant for use in a pick-up type impression application. The passage also accepts a second component for attaching the impression coping to the implant for use in a transfer type impression application.

Abstract: An implant for implantation into bone tissue having an exterior surface includes an elongated body and at least one thread. The elongated body has a distal end portion for being submerged in the bone tissue, a proximal end portion for being located near the exterior surface of the bone tissue, a central axis, and an outer surface. When viewed in cross-section, the elongated body has a non-circular cross-section. The non-circular cross-section includes a plurality of lobes and a plurality of dwells. Each of the plurality of dwells is disposed between adjacent ones of the plurality of lobes. The thread extends radially outward with respect to the central axis from the outer surface of the elongated body between the distal end portion and the proximal end portion. As the implant is screwed into the bone tissue, only the lobes on the elongated body engage the bone tissue. Because no contact exists between the dwells and the bone tissue, the amount of torque required to insert the implant is reduced.

Abstract: In an air filter assembly a non-metallic air filter media is clamped between a pair of opposed metal end flanges, one of which is mounted by a threaded mounting rod in alignment with an opening through a horizontal panel. A metal sleeve integral with one of the end flanges stiffens the assembly and prevents the filter media from collapsing. The air filter assembly is used with numerous similar air filter assemblies to filter inlet combustion air for large gas turbine engines.

Abstract: A two-piece abutment system is disclosed. The first part includes a tapering inner surface which is part of a bore extending entirely through the first part. The first part includes a socket for mating with a boss or post on a dental implant. The elongated second part includes a threaded stem for engaging a threaded bore with a dental implant and a post which extends above the first part. The second part extends through the bore of the first part and is screwed into the implant. As the second part is screwed into the implant, a tapering external surface on the post of the second part frictionally locks with the tapering inner surface of the first part.

Abstract: A process to decrease the strength of an electric field produced by a high voltage conductive path on a printed circuit board and printed circuit assembly using same includes the steps of coating the upper side (5) of the conductive path or track (1) with a thick layer of electrically conductive coating material (4); and reflowing so that the upper edges (8, 9) of the track (1) are also covered with a relatively thick layer of coating material. The track (1) is thus embedded in a mass of coating material having more or less a rounded-shaped cross-section and the sharp upper edges (8, 9) of this track, where a strong electrical field is generally produced, are smoothed. As a result, the strength of the electrical field around the track (1) is reduced. In a preferred embodiment, a second track (13) similar to the first track (1) is created symmetrically thereto on the opposite surface (14) of the printed circuit board (3).

Abstract: A post-and-socket connector of the anti-rotational kind having means near the base of one or both parts for filling selected portions of the space between them and thereby restricting or eliminating relative rotation of the two parts round a common axis.

Abstract: A gold abutment for receiving a cast metal substrate of an artificial tooth has a non-rotational (hexagonal) socket in its base. To prevent distorting the socket in the casting process the base is provided with an annular groove. Larger than usual base diameters can be used with no noticeable distortion of the socket.

Abstract: A dental transfer coping for taking a dental impression of a patient's case in which information about the rotational position of an installed implant around its axis is preserved has plural impression interlocking elements arrayed on its outer surface. These elements are rotationally indexed to the ant-rotation device of the implant, and are uniformly arrayed around the coping so that the coping can be removed from the impression and reinstalled in it in many rotational positions without losing the rotational information of the implant.

Abstract: Chlorothalonil compositions which are useful in formulating aqueous pesticidal sprays in which zinc oxide is present as a micronutrient; the compositions are particularly useful for application to potatoes.

Abstract: A method is disclosed for persistently storing in an object-oriented format various pieces of information required to display and search a report. The information is stored in a logical hierarchy including multiple "level break" objects at a first level. Similar level break objects may be provided at a second level of the hierarchy, and at a third level, etc. Level breaks represent divisions between parallel report entities, and the level breaks at a "first level" divide report entities which can not be further segregated into discrete groups. In general, the objects representing level breaks include general information about an entity such as the entity's name and location, or report totals associated with that entity. In the hierarchy, each level break object at the first level may reference one or more level break objects at the second level, and, in addition, may reference objects representing the visual regions (or "frames") in which report information pertaining to the first level entity is displayed.

Abstract: A portable laser surgery evacuator includes an aspirator contained in the same housing which is positionable in an operating room near a surgical site. Surgical plume is evacuated from the site by vacuum, filtered through moisture, purifying and particle filters, chemically deodorized, and exhausted in cleaned form into the operating room environment. Fluid containing liquid is aspirated by pumping to a collector bag hung on a hose of the evacuator. Gaseous plume components of the fluid are vented from the collector to the evacuator to be cleaned with the plume. The venting is provided by a hose joining the evacuator inlet hose at a Venturi like connection. The evacuator includes a symmetrical reversible charcoal filter having a moisture absorbing cellulose filter at each end. A disposable aspirator pump of the rotating impeller type mounts on a motor shaft extending through the housing and is restrained against rotation by fixed hooks against which the pump fittings are urged by the torque of the motor.

Abstract: A construction for a battery of coke ovens and to a method for repairing m in which a continuous vertical joint plane is provided in the walls of the piers separating the ovens of the batteries, which walls are constructed of courses and headers and stretchers, the plane extending along one of the lateral faces of the headers, with one of the two adjacent stretchers of the course immediately above and below the header being longer than the other stretchers in the wall and the other being shorter so that the joint between them is located in the same vertical plane as the said faces of the headers.

Abstract: The invention relates to cooling towers of the type currently in use for cooling water and/or condensing exhaust steam as for example in association with nuclear or fossil fuel type power plants. Typically towers are very large and very high. The invention embodies an original concept for utilization of such towers, for example hyperbolic towers, for the generation of energy from wind and also for improving the efficiency of the cooling tower. In the exemplary form of the invention a large wind driven rotor is provided to be carried by the tower and to rotate around its axis at the position of the narrowed throat of the tower. Pressure is generated by the rotor and discharged through nozzles arrayed on the inside of the walls of the tower to augment and enhance the draft within the tower.

Abstract: A number one cylinder ignition signal from an engine is utilized to initiate counting of low coil signals from the same engine, and coincidence of a count equal to the number of cylinders in the engine and a subsequent number one cylinder ignition signal causes generation of a valid one signal and shifting into a mode in which subsequent valid one signals are simply generated by the counting of low coil signals, whether or not coincident number one signals are present. Thus, pseudo number one signals are generated from low coil signals when in the run mode; the run mode will continue indefinitely unless the count overflows (as from a failure) or is re-initiated by external action.

Abstract: A tubular housing having a circular inner surface provided with a plurality of recesses for receiving pistons movable pivotally between a position fully retracted in said recesses and a position projecting radially inward from the housing. A rotor is supported centrally in the housing for axial rotation and has peripheral cavities equal in number to the number of pistons in the housing and capable of receiving the pistons at predetermined intervals of rotor rotation to perform with the pistons the functions of steam intake, steam expansion and exhaust. The housing has steam intake ports and exhaust outlet ports operable in conjunction with the rotor and pistons to perform the engine functions. The pistons are moved inwardly into the cavities during certain operations of the engine by levers operatively connected to the rotor.

Abstract: A tubular housing having a circular inner surface provided with a plurality of recesses receiving pistons movable pivotally between a position fully retracted in the recesses and a position projecting radially inwardly from the housing. A rotor is rotatably supported centrally in the housing and has peripheral cavities equal in number to the number of pistons in the housing and capable of receiving the pistons in portions of their pivotal movement to perform with the pistons functions of fuel intake, fuel compression, firing and exhaust. The housing has fuel intake ports, spark plugs and exhaust outlet ports operable in conjunction with the rotor and pistons to perform the engine functions. The pistons are moved inwardly into the cavities during certain operations of the engine by levers operably connected to the rotor. The engine has coolant and oil circulating structure to cool it and to lubricate it. In addition, seals are associated with the pistons and rotor to prevent the escape of power.