Abstract: A fluid-handling apparatus having a magnetic drive comprises a rotatable driver member and a driven member provided with blades for imparting motion to a fluid and mounted on a stationary shaft forming a one-piece unit with a thin diaphragm positioned between said two members which comprise a plurality of permanent magnets. Each magnet has a central aperture dimensioned so that the attracting force is substantially equal throughout the body of the magnet.

Abstract: Apermanent magnet coupling including high strength rare earth-cobalt permanent magnets retained under uniform compression during rotation.

Abstract: A magnetic coupling for a stirrer drive in a high pressure autoclave in which the magnet shaft is in the form of a sleeve-like bush fixed on the end of the stirrer shaft. A portion of the magnet shaft serves as a carrier of segmented permanent magnets on the outside. An inner coupling part, including the magnet shaft, is covered by a hood and the outer coupling part comprises a bell equipped with permanent magnets on the inside. The bell covers the hood.

Abstract: An electromagnetically driven pump in which a stationary metallic shaft carries the pump impeller. The shaft is rigidly secured to a metallic separating wall having an outer flange secured to the coupling housing. The impeller is driven by a magnetic coupling and the separating wall extends between the elements of said coupling to prevent fluid communication therebetween.

Abstract: A permanent magnet coupling having opposed magnetic coupling members, and including process fluid bearings and dual flow paths for process fluid providing temperature control.

Abstract: An improved hermetic clutch for driving a shaft and adapted for securement to a non-rotating supporting structure includes first and second elongate annular members, the second being concentrically disposed within the first with the shaft coupled to one of the members for rotation therewith. Means are provided for electromagnetically coupling the members for imparting rotation to the one member upon mechanical rotation of the other. The assembly also includes a "can"-shaped hermetic seal disposed between the two members and fixedly secured at its open end to the supporting structure, and means mechanically coupled to the stationary support and the seal for preloading the seal in axial tension to enhance the structural integrity thereof. Means are also provided for supporting each of the members for rotation relative to the seal, and for maintaining concentricity therebetween.

Abstract: A magnetic drive for coupling mechanical power to the interior of a high pressure vessel is disclosed. The drive includes an output or driven portion including a non-magnetic housing hermetically sealed to a wall of the vessel and containing an output shaft which extends into the vessel. The shaft is mounted for rotation in bearings contained within a cylindrical extension of the housing projecting into the vessel interior. The opposite end of the shaft carries a plurality of permanent magnet segments coaxial therewith and is located within a high pressure gas barrier of the housing external of the vessel. Input power is provided by an input shaft connected to a power source, the input shaft carrying a housing which is coaxial to the gas barrier and has permanent magnets therein which will interact with the output shaft magnets upon rotation of the input shaft to cause rotation of the output shaft.

Abstract: Described is a magnetically coupled pump and an impeller assembly therefor. In a magnetically coupled pump wherein the hub portion of a rotary impeller is inserted within the bore of a hollow cylindrical driven magnet to be rotated by a surrounding annular driving magnet, the hub portion of the impeller is provided with a deformable projection. A tapered wedge is inserted into the bore to deform the projection and to attach the driven magnet to the hub. The tapered wedge is formed of graphite which also performs the function of a bushing upon which the impeller is rotated.

Abstract: The drive uses a recessed wall or partition between the pole-rings of the two rotors to substantially diminish the occurrence and strength of eddy currents. The recesses may be in the form of grooves, depressions or axial bores which reduce the mass of the wall. The wall is further reinforced by non-magnetic electrically non-conductive or insulated elements of high tensile strength to compensate for the reduction in strength caused by the grooves, depressions or bores.

Abstract: Disclosed is a permanent magnet pump in which the pump impeller and the interior rotor of a permanent magnet driving means receives drive torque transmitted in synchronism by an exterior rotor. The exterior rotor is positioned, axially in one form and radially in another form, opposite the interior rotor with an air gap defined between them. Thin, plate-like permanent magnets carried by the rotors face each other across the air gap. The pump impeller shaft and the interior rotor are housed and supported in a common space which is sealed from the exterior by a partition of non-magnetizable material extending through the air gap.

Abstract: A weighing device for the automatic regulation of a crystal-growing operation includes an upright shaft on which a crucible for a crystal melt is supported. The shaft is journalled for rotation and has limited freedom of movement in downward direction under the weight of the crucible and the melt therein. Weight-responsive signal-generating devices are engaged by the shaft or components associated therewith, so that pressure is exerted upon these devices to different degrees, in dependence upon the weight of the melt in the crucible. These devices produce signals as a function of the weight acting upon them, and these signals in turn control the crystal-growing operation. The shaft is rotatable by a drive arrangement which does not require physical contact with the shaft to rotate the same.

Abstract: An improved Vuilleumier cycle refrigerator is disclosed. To reduce fluid contamination and inactive refrigerant volume, the hot and cold fluid displacers of the refrigerator are driven by a magnetic drive mechanism. The magnetic drive mechanism has a first and second assembly. The first assembly is contained in the fluid chamber together with the hot and cold displacers; the second assembly including the drive motor is mounted exteriorly of the fluid chamber. The first and second assemblies of the drive mechanism include adjacent magnets separated by the wall of the fluid chamber. Thus, the first and second assemblies are coupled together by their magnetic field for rotation to drive the hot and cold displacers and the fluid chamber provides an hermetic seal to contain the working fluid thereby removing the motor with its air space and contaminants from the fluid chamber.

Abstract: An electromagnetically driven pump having a rotor unit comprising a motor armature integral with a pump impeller and supporting bearing means mounting the rotor unit for rotation and limiting axial movement of the rotor unit in one axial direction and additional means for limiting movement of the rotor unit in an opposite axial direction.

Abstract: A rotary motion transformer particularly adapted to provide continuous rotary motion to a driven member in response to an intermittently rotated driving member is provided. The driven member and the driving member are oppositely poled magnetic permeable members disposed proximate to each other to provide a flux field therebetween. The driven rotary member is disposed in a viscous damping reservoir, the viscous damping reservoir effecting smooth and continuous rotation of the driven member.

Abstract: Cylindrical impeller-coupling magnets of the ceramic type in magnetically-coupled centrifugal pumps according to the disclosure are encircled by guard banding to aid in retaining the cylindrical configuration in cases of cracking and fissuring in the magnet body occasioned by exposure to superheated liquids in the impeller chamber. Supplements to the subject: the banding may be characterized as (1) non-metallic or metallic and non-magnetic; (2) multiple narrow bands or a single wide banding embracing the cylindrical aspect of the magnet in its entirety; (3) the cylindrical aspect of a cup-shaped metallic jacket with a bottom portion additionally shielding one axial end of the magnet; (4) the cylindrical aspect of a totally-enclosing encasement; (5) of thin cross section to lie upon the cylindrical surface (6) of moderately thick ring-like stock seating in recessing grooves in the cylindrical surface; (7) in all forms constrained against projection more than slightly into the magnetic air gap.

Abstract: In a magnetic transmission device a torque magnetic ring having an even number of axially aligned bars of highly magnetic material is rotatable mounted relative to at least one of two magnetic pole rings for transmitting torque between the pole rings.

Abstract: A magnetically-coupled centrifugal type of pump characterized in that the pump housing comprises two members which can be made by molding, for example in plastic, and one of the body members has formed as integral parts thereof two reversely opening magnet wells, one for the inner driven coupling magnet and the other for the outer driving magnet; and the shaft mounting the impeller is footed on either member as an integral part of such member. Supplements to the subject: (1) the shaft may be separable and if so, has a sealing ring seated in a groove in the wall on which it is mounted or in the juxtaposed foot of the spindle; and (2) if the shaft is formed integrally, it may include a long metallic internal warp-preventing member.