A magnetic stirrer for stirring a fluid in a vessel where a stirring rotor in form of a permanent bar magnet is easily movable for rotation by means of an externally applied rotating magnet field. Said field is set up by four magnet coils arranged in a parallel relationship to form a square configuration and fed by respective phase-shifted a.c. currents, the common center axis of the coils being aligned with the rotor in the overlying vessel. A plate of mu-metal is arranged in said center axis a...

A wet magnetic separator has a rotor formed on its periphery with a through annulus which is defined by two concentrically arranged non-magnetic walls and is divided into passages by radially-extending laminated spacer bars of a magnetic material. The rotor is surrounded by pole pieces which are energized in pairs to provide successive magnetic poles of opposite polarity around the rotor. The arrangement of the rotor and the magnetic poles is such that a magnetic field of maximum intensity is in...

A magnetic roller comprising a diamagnetic cylinder rotatable about magnets extending axially inside the cylinder is made to inhibit escape of magnetically attractable powder particles from the surface of the cylinder by providing the magnets, or a cylindrical magnet composed of several of them, with means which form in the magnetic field near each end of the cylinder a spirally extending bandlike field range which deviates in field strength from that existing in other regions of the cylinder su...

The present invention refers to a magnetic core comprising flat magnetic plates superimposed and joined in order to constitute the toroidal form of the core, creating an internal space for the winding and a lateral air gap groove. There being assembled in the open space of the core or air gap, annulling it, an open hoop made of magnetic material having suitable dimensions, whose outer edge penetrates into the interior space of the winding in order thus to create a new internal air gap because th...

A magnetic wedge is made by preparing a composition of a thermosetting resin system and magnetizable particles, placing the composition in a mold, vibrating the mold at least until air bubbles are no longer evolved from the composition, curing the composition, and fabricating the lower portion of the cured composition into the shape desired for the wedge. The vibration removes air and compacts the particles which results in a wedge having overall superior physical and magnetic properties.

A rail-type conveyor unit is disclosed for handling metal sheets or similar articles which is characterized by an elongate frame having sprocket assemblies at opposite ends on which are supported a pair of parallel, roller-type, endless chains, and having a series of electromagnets mounted in longitudinally spaced relation thereon which are operative for holding the sheets against padded cross members connecting the chains as the latter traverse a path along the bottom of the conveyor, the cross...

A magnetic roller comprising a diamagnetic cylinder rotatable about magnetic poles which extend axially inside the cylinder and are each formed by similar poles of magnets lying axially beside each other is made to generate a substantially homogeneous magnetic field over its full working width, thus enabling the magnets to be made of strongly ferromagnetic, anisotropic material, by the provision, over and along one or more of the magnetic poles between the magnetic pole and the diamagnetic cylin...

The improved magnetic transmission having an armature mounted to rotate about an axis of rotation. Each of a plurality of permanent magnets carried by the armature are magnetically oriented with each adjacent magnet having opposite magnetic polarities. Each of a plurality of drive motor permanent magnets is rotatably mounted at a fixed radial position with respect to the armature axis of rotation and is disposed in magnetic proximity with respect to the permanent magnets carried by the armature....

A switch which can be activated by a magnetic force and which includes a housing having at least two spaced apart electrical terminals thereon. Internal of the housing is contained a coil spring supported at one end thereof, and axially holding an elongated, magnetically responsive, conductive member in cantilevered fashion within the housing. The elongated member and spring can move from an aligned position to a deflected position responsive to the magnetic force. A first contact interconnects ...

A magnetic field is established in a predetermined zone. A quantity of fluid, from which native magnetizable particles are to be separated, is passed through the predetermined zone; and, at the same time, a magnetizable material is passed through the predetermined zone in the same direction as the fluid, so that native magnetizable particles are attracted to the magnetizable material.