Abstract: A charging device and a charging system are provided. The charging device includes a charging portion and a plurality of magnetic attracting portions. The plurality of magnetic attracting portions are arranged symmetrically with respect to the charging portion. Each of the plurality of magnetic attracting portions includes an N pole and an S pole. At least one of the N poles and/or at least one of the S poles serves as an attracting function pole of the magnetic attracting portion, and a pair of attracting function poles symmetrical with respect to the charging portion are different in polarity.

Abstract: There is provided a tiled display including: a plurality of display devices; a plurality of first magnets in contact with a surface of each of the display devices; a wall portion configured to be attached to and detached from the display devices; and a plurality of second magnets disposed on a surface of the wall portion and in line with the first magnets. The second magnets are movable in a direction perpendicular to or intersecting the surface of the wall portion. Accordingly, it is possible to attach/release the plurality of display devices to/from the wall portion by forming an attractive force or a repulsive force between the first magnets and the second magnets.

Abstract: Provided is an artificial limb structure having a magnetic lock device. The artificial limb structure includes: an artificial limb coupled to a magnetic lock device; and a socket liner unit detachably coupled to the magnetic lock device, wherein the socket liner unit includes an attachment and detachment member attachable and detachable to/from the magnetic lock device by a magnetic force, and the magnetic lock device includes: permanent magnets; a magnetic flux control unit provided on the permanent magnets and transmitting the magnetic force generated by the permanent magnets to the attachment and detachment member or interrupting a transmission of the magnetic force; a magnetic force interrupting unit provided at the magnetic flux control unit and interrupting magnetic forces between permanent magnets arranged at opposite sides of the magnetic force interrupting unit; and a switch unit adjusting an arrangement of the permanent magnets with respect to the magnetic force interrupting unit.

Abstract: A vehicle antenna device includes: an antenna base; an antenna case which is overlaid on the antenna base; and an antenna element and an amplifier board which are disposed inside the antenna case. The antenna element has a capacitive element and a coil element, and a filter board is disposed between the capacitive element and the coil element.

Abstract: A coolant pump includes a pump frame, a driving wheel driven by an engine, a pump wheel driven by the driving wheel, and a clutch which couples the driving wheel with the pump wheel. The clutch comprises a friction surface arranged at the driving wheel, and a clutch disc which corresponds to the friction surface. The clutch disk is connected with and co-rotates with the pump wheel, and is axially shiftable between an engaged and a disengaged position. An axial pretension spring pretensions the clutch disc into the disengaged position. A permanent magnet forces the clutch disc into the engaged position. An electromagnet, when energized, generates a polarization which is opposite to a polarization of the permanent magnet to reduce a total magnetic attraction force of the permanent magnet with respect to the clutch disc and to thereby push the clutch disc into the disengaged position via the pretension spring.

Abstract: A magnetic base for coupling a drill press to a ferromagnetic workpiece includes a ferromagnetic body having spaced, substantially parallel first and second rails. Each of the first and second rails includes a flat bottom surface engageable with the ferromagnetic workpiece. A coil is positioned between the first and second rails for generating a holding force on the ferromagnetic workpiece. The coil defines a central axis that is parallel with the bottom surface of each of the first and second rails.

Abstract: A cutter holding device is provided for a cutting machine and includes: a mounting base and a holding member mounted in the mounting base. The mounting base includes a mounting section, iron cores mounted in the mounting section, and a winding wound around an outer circumference of the mounting section. The mounting section includes a mounting trough formed therein. The holding member is mounted in the mounting trough, wherein the iron cores and the winding collectively form first electromagnets, which upon application of electricity thereto, attract and fix the holding member in the mounting trough of the mounting base. The cutter holding device uses magnetic forces applied between the mounting base and the holding member for attraction and fixing so as to easily control fixing and removal of the holding member.

Abstract: The present invention relates to a coupling device (100) for connecting a residual limb liner (10) to a residual limb socket (20) of a limb prosthesis, characterized by: a magnet assembly (120) comprising a permanent magnet (122) sandwiched by a pair of iron bars (124) for creating a magnetic field; a housing (110) comprising a protrusion (112) for intensifying magnetic field and a cavity (114) for receiving the magnet assembly (120), wherein said housing (110) is embedded at a distal end of the residual limb socket (20); a controlling means (130) coupled to the housing (110) and the magnet assembly (120) for controlling the magnetic field by rotating the magnet assembly (120); and a mounting plate (140) coupled to the residual limb liner (10); wherein the mounting plate (140) is attracted to the protrusion (112) of the housing (110) when the permanent magnet (122) is vertically aligned, thereby attaching the residual limb liner (10) to the residual limb socket (20); and wherein the mounting plate (140) is re

Abstract: This document describes techniques using, and apparatuses including, switchable magnetic locks. These techniques and apparatuses can enable low or no power consumption and a seamless design for locking and unlocking of devices one to the other, such as computing devices and peripherals.

Abstract: The present invention provides a kind of permanent magnetic lifting device, which has: a housing, at the bottom of which is a clamping surface for clamping objects; fixed magnet(s), set in housing relatively fixed to housing; a turnable magnet, set in housing relatively turnable to fixed magnet. When turnable magnet is in the first position relative to fixed magnet, the magnetic force generated by fixed magnet and turnable magnet to clamping surface is zero magnetic force; when turnable magnet is in the third position relative to fixed magnet, the magnetic force generated by fixed magnet and turnable magnet to clamping surface is the maximum magnetic force. The permanent magnetic lifting device also has a positioning mechanism for second position to position the turnable magnet in the second position relative to fixed magnet, fixed magnet and turnable magnet generate trial clamping magnetic force to clamping surface for clamping objects on trial.

Abstract: A method for producing a switchable core element-based permanent magnet apparatus, used for holding and lifting a target, comprised of two or more carrier platters containing core elements. The core elements are magnetically matched soft steel pole conduits attached to the north and south magnetic poles of one or more permanent magnets, inset into carrier platters. The pole conduits contain and redirect the permanent magnets' magnetic field to the upper and lower faces of the carrier platters. By containing and redirecting the magnetic field within the pole conduits, like poles have a simultaneous level of attraction and repulsion. Aligning upper core elements “in-phase,” with the lower core elements, activates the apparatus by redirecting the magnetic fields of both pole conduits into the target. Anti-aligning upper core elements “out-of-phase,” with the lower core elements, deactivates the apparatus resulting in pole conduits containing opposing fields.

Abstract: Preferred embodiments of the present magnetic locking system can be used for releasably locking a first component to a second component. In one embodiment, the locking system includes a ferro-magnetic member associated with the first component, where the ferro-magnetic member is made of a ferro-magnetic material, and a housing attached to the second component and positioned adjacent to the ferro-magnetic member. Preferably, the housing includes first and second blocks that sandwich an intermediate block. Further, the first and second blocks are each preferably made of a ferro-magnetic material and the intermediate block is made of a non-ferro-magnetic material. Additionally, there is also an aperture formed within the housing, with a permanent magnet rotatably seated within the aperture.

Abstract: A method and device for a switchable core element-based permanent magnet apparatus, for holding and lifting a target, comprised of two or more carrier platters containing core elements. The core elements are magnetically matched soft steel pole conduits attached to the north and south magnetic poles of one or more permanent magnets, inset into carrier platters. The pole conduits contain and redirect the permanent magnets' magnetic field to the upper and lower faces of the carrier platters. By containing and redirecting the magnetic field within the pole conduits, like poles have a simultaneous level of attraction and repulsion. Aligning upper core elements “in-phase,” that is, north-north/south-south with the lower core elements, activates the apparatus by redirecting the combined magnetic fields of the pole conduits into the target.

Abstract: A fast anchoring magnetic holder including multiple attractive surfaces comprises a first magnet, a second magnet, a first insertion rod and a second insertion rod. The first magnet has a magnetic workstation surface. The second magnet has a magnetic anchor surface. The first and second magnets are stacked together. The first insertion rod and second insertion rod are respectively inserted into the first magnet and second magnet, and are turned to change distribution of the magnetic field of the first magnet and second magnet to alter the magnetic workstation surface and magnetic anchor surface from a non-magnetic state to a magnetic state to attract a working piece to a workstation.

Abstract: A rotary actuator with a magnetically produced tactile sense is provided, in particular for a motor vehicle. The rotary actuator includes two plane-parallel permanent magnets, with the first magnet being arranged in a fixed position in a housing of the rotary actuator, and in which case the second magnet can be rotated with respect to the first magnet by a handle of the rotary actuator.

Abstract: The magnetic attractive conjunction mechanism of rotating gripper in clamping device of the present invention relates to a clamping device with sector type prism rotating gripper clamping various shapes desirable targets, in which magnetic attractive conjunction mechanism is installed between rotary sector type prism rotating gripper and flush socket with sector type recessed cylindrical sliding surface of clip jaw for coupling to prevent from detachment.

Abstract: A magnetic device having a housing with a front wall. A first magnet assembly includes a north and south pole and a second magnet assembly also includes a north and south pole. The magnet assemblies are pivotally mounted in the housing and pivotal between a first position in which the north pole of the first magnet assembly and the south pole of the second magnet assembly face each other and are positioned adjacent the front wall of the housing, and a second position in which the north pole of the first magnet assembly and the south pole of the second magnet assembly face each other and are retracted from the front wall. An actuator pivots the magnet assemblies between their first and second positions while a spring urges the magnet assemblies toward the second position.

Abstract: A hinge assembly (20) including a first magnetic member (21) and a second magnetic member (22) is described. The polarities of opposing end surfaces of the first magnetic member and the second member are different. The second magnetic member is configured for rotating relative to the first magnetic member to generate a magnetic moment. In addition, an exemplary portable electronic device (100) equipped with the hinge assembly is also described.

Abstract: A magnetic clamp (10) for use in clamping metal formwork in precast concrete manufacture includes a housing (12). A magnet (14) is displaceably arranged within the housing (12). A displacement mechanism (18) is displaceably arranged on the housing (12) to displace the magnet (14) relative to the housing (12). A force amplification mechanism (24) is connected to the magnet (14) and at least a portion of the force amplification mechanism (24) is interposed between the displacement mechanism (18) and the magnet (14).

Abstract: Provided are magnetically actuated wafer chucks that permit a wafer to be clamped or undamped at any time during a process and at any rotational speed, as desired. Such wafer chucks may include constraining members that are movable between open and closed positions. In a closed position, a constraining member aligns the wafer after wafer handoff and/or clamps the wafer during rotation to prevent it from flying off the chuck. In an open position, the constraining member moves away from the wafer to allow liquid etchant to flow from the wafer edge without obstruction. The constraining members may be, for example, cams, attached to arms or links of the chuck. The cams or other constraining members move between open and closed positions by self-balancing forces including a first force, such as a spring force, that acts to move a cam in a first direction, and a non-contact actuate-able force, such as a magnetic force, that acts to move the cam in the opposite direction.

Abstract: A superconductivity utilizing support mechanism comprises a superconductive coil and a ferromagnetic body. One of the ferromagnetic body, so constituted as to slide in a direction of a center axis of the superconductive coil, and the superconductive coil, so constituted as to slide in a direction of the center axis thereof, is floated and supported relative to the other by axial magnetic attraction caused by a center plane of the superconductive coil and a center plane of the ferromagnetic body moving apart from each other.

Abstract: A magnetic fixing device for fixing a magnetic coil to a rotor of an autowinder includes a first clip element and a second element. The first clip element is disposed on the rotor of the autowinder, and the second clip element corresponds to the first clip element for cooperatively clipping the magnetic coil by magnetic force.

Abstract: A magnetic separator with permanent magnets includes a ferromagnetic member (2) for the circuit connection between at least two magnetic poles (3C) made up of ferrite magnets (12) in the bottom portion in contact with said ferromagnetic member (2) for the circuit connection, and of rare earth magnets (13) in the top portion that represents the entrance/exit surface (14) of the magnetic flux lines (15, 16). The ratio between the effective magnetic length of the ferrite magnets (12) and of the rare earth magnets (13) is preferably 2:1, and the preferred materials are strontium ferrite for the former and iron-boron-neodymium for the latter. In this way it is possible to combine the magnetic characteristics of the two types of permanent magnets so as to make them complementary and thus enhance the attractive effectiveness of the separator both for ferromagnetic materials with high or low shape factor, and for materials with high or low and sometimes very low permeability.

Abstract: A switch type ON/OFF structure for hoisting magnetic disks has a handle turnable towards one side to demagnetize and towards another side to generate a magnetic force to attract and move a work piece. The handle is hinged on one end surface of a hoisting magnetic disk which also has a first detent member and a second detent member. The first and second detent members can stop the turning of the handle. The handle further has an extensible latch member at one side spaced from the handle at a selected interval. The latch member has a distal end slidable over the second detent member and extendable downwards to allow the second detent member to be wedged in the interval and anchored. Thereby the hoisting magnetic disk can provide the magnetic attracting force and hoist and move the work piece safer.

Abstract: A permanent magnetic male and female levitation support has a first part with a cavity and a plurality of retainment mechanisms incorporated therein, and a plurality of first permanent magnets evenly distributed around the perimeter of the cavity and held in place by the retainment mechanisms, wherein the first permanent magnets produce a first rotationally invariant magnetic field around a first axis. A second part is rigidly connected to a base and produces a second rotationally invariant magnetic field around a second axis. When the first axis is aligned with the second axis, the first magnetic field and the second magnetic field simultaneously produce a repulsive force and a restorative force to levitate the first part relative to the second part.

Abstract: Method and device for self-regulated flux transfer from a source of magnetic energy into one or more ferromagnetic work pieces, wherein a plurality of magnets, each having at least one N-S pole pair defining a magnetization axis, are disposed in a medium having a first relative permeability, the magnets being arranged in an array in which gaps of predetermined distance are maintained between neighboring magnets in the array and in which the magnetization axes of the magnets are oriented such that immediately neighboring magnets face one another with opposite polarities, such arrangement representing a magnetic tank circuit in which internal flux paths through the medium exist between neighboring magnets and magnetic flux access portals are defined between oppositely polarized pole pieces of such neighboring magnets, and wherein at least one working circuit is created which has a reluctance that is lower than that of the magnetic tank circuit by bringing one or more of the magnetic flux access portals into clo

Abstract: A lifting magnet having a housing, a rotary magnet unit, and a stationary magnet unit. The lifting magnet also includes a pinion, a socket moving up and down, a slider rotating the pinion to set the magnetization and demagnetization states at top and bottom dead points, respectively, a locking part provided in one of the socket and the slider, a locking unit provided in the other, including a locker, and moving both the socket and the slider up and down while the locker is locked to the locking part, and a locking unit driver alternately driving the locking unit to make the locker released from and locked to the locking part at first and second moving operations, respectively. With this configuration, the lifting magnet can stably keep on and off states of an attractive magnetic force and conveniently performs lifting and carrying operations.

Abstract: A magnetic adsorption device comprises: a magnetic circuit block having a cavity extending in one direction and divided into a plurality of magnetic pole members at intervals in the circumferential direction of the cavity by a plurality of spacers; and a permanent magnet assembly having an N pole and an S pole and capable of rotating selectively at a first and a second positions spaced apart about an axis of the cavity so as to adsorb and release a magnetic substance. Adjoining spacers about the axis are distant by an angular space of less than 180° about the axis.

Abstract: A switchable magnetic device includes a first magnet and a second magnet, both of which are essentially cylindrical. Magnets are housed in a housing made from pole pieces. Pole pieces are ferromagnetic. Lower magnet is fixedly mounted in the housing while upper magnet can rotate within the housing. Upper magnet is formed with notches or grooves along its vertical side walls. These notches or grooves receive downwardly depending arms of bar. Bar is received inside a groove formed on boss. Boss is connected to a short bar that, in turn, is fixedly connected to a handle or lever. By this means, rotation of handle or lever causes rotation of second magnet. When the upper magnet is positioned such that its north pole substantially overlies the south pole of lower magnet and the south pole of upper magnet substantially overlies the north pole of lower magnet, the first and second magnets act as an internal active magnetic shunt and as a result the external magnetic field strength from the device is quite low.

Abstract: Magnetic module for the magnetic anchorage to a ferromagnetic surface of another magnetic, or ferromagnetic module, whose head includes: a first multipolar magnetic stator that in turn defines a multipolar magnetic anchoring surface, and a multipolar magnetic rotor or a second multipolar magnetic stator, coaxial to and facing the first multipolar magnetic stator and equipped with means for orienting the poles of the multipolar magnetic rotor or second multipolar magnetic stator, in series or in parallel with respect to the poles of the first multipolar magnetic stator in order to disable or enable the multipolar magnetic anchoring surface of the first magnetic stator.

Abstract: A magnetic lifting machine according to the present invention is to prevent an antioxidant film on the surface of neodymium magnets from exfoliation, by having the neodymium magnets not be in direct contact with a pair of polarity plates of the machine but via anti-exfoliation plates made of non-magnetic material. The anti-exfoliation plates are fitted to both sides of a rotor containing the neodymium magnets therein between the polarity plates, and each of the anti-exfoliation plates may include a plurality of holes for oil storage radially therethrough.

Abstract: A switchable magnetic device includes a first magnet (10) and a second magnet (11), both of which are essentially cylindrical. Magnets (10,11) are housed in a housing made from pole pieces (12,13). Pole pieces (12, 13) are ferromagnetic. Lower magnet (10) is fixedly mounted in the housing whilst upper magnet (11) can rotate within the housing. Upper magnet (11) is formed with notches or grooves (14, 15) along its vertical side walls. These notches or grooves (14, 15) receive downwardly depending arms (16, 17) of bar (18). Bar (18) is received inside a groove (19) formed on boss (20). Boss (20) is connected to a short bar (21) that, in turn, is fixedly connected to a handle or lever (22). By this means, rotation of handle or lever (22) causes rotation of second magnet (11).

Abstract: A magnetic gripping device having a magnetic assembly in turn having an outer magnetic core, and an inner magnetic core mounted inside the outer magnetic core so as to rotate, about a given axis of rotation, between a first operating position, in which the inner magnetic core prevents the outer magnetic core from attaching magnetically to the surface of a generic part of ferromagnetic material, and a second operating position, in which the inner magnetic core allows the outer magnetic core to attach magnetically to the surface of the part; the gripping device also having a torque-control actuating device, which, on command, rotates the inner magnetic core in such a manner as to set it selectively to the first or second operating position, while controlling the value of the twisting torque employed in doing so.

Abstract: A magnetic rotating apparatus is used for connecting a body portion and a rotating portion of a foldable product. The body portion has an assembling portion while the rotating portion has a pivot portion. The rotating portion is secured to the body portion by engaging the pivot portion with the assembling portion, so that the rotating portion is allowed to pivot on the body portion and be positioned at the first stable equilibrium or the second stable equilibrium. The magnetic rotating apparatus comprises a magnetic body component situated in the assembling portion and a magnetic pivot component situated in the pivot portion. The magnetic body component and the magnetic pivot component are disposed as mates. Also, the opposite surfaces of the magnetic pivot component and the magnetic body component have the same polarity. When the rotating portion and the body portion are maintained at the first stable equilibrium, the magnetic pivot component is positioned at one side adjacent to the magnetic body component.

Abstract: A magnetic lifting apparatus by using neodymium magnets, incorporating a plurality of polarity plates (10) disposed with a predetermined interval and having non-magnetic medium (11) in the longitudinal center; a plurality of interval members (20) disposed between the polarity plates (10); a top cover (30) covering the interval members (20) and the polarity plates (10), having a hook (31) on the upper side; a plurality of neodymium magnets (40) having S/N polarity in opposite and disposed between the polarity plates (10); a plurality of rotors (50) rotated with the neodymium magnets (40) being inserted therein; a switch handle (60) for switching polarity position of the rotor (50) and the neodymium magnets (40) engaged therewith to switchably generate magnetic attraction. The oxidation prevention means (70) includes a hollow space around the neodymium magnets (40) either vacuum or filled with an oxidation prevention liquid in order to prevent the neodymium magnets (40) from being in contact with oxygen.

Abstract: A manual magnetic anchoring device includes a monolithic ferromagnetic block, whereon a housing for stator magnets, a housing for a rotor core, a ferromagnetic crown for short circuiting of the magnetic flux during deactivation of the anchoring device, and at least a first and a second collector pole defining a working surface for anchoring a ferrous part are formed in one single piece.

Abstract: A mounting apparatus (100) suitable for retaining an antenna (112) includes a base (102) having magnetic sources (104) and (106) capable of providing varying magnetic forces. Magnet (104) retains the base against a metal surface (410), while an electronically controlled magnet (106) provides additional retention of the base (102) against the metal surface (410) when activated, thereby preventing movement of the base and antenna (112).

Abstract: An electromagnet having one or more coils wrapped around a plate-shaped core produces a uniaxial magnetic filed in the vicinity of a substrate surface for orienting a magnetic film deposited onto the substrate surface. Variations in the magnetic mass of the plate-shaped core or in the magnetic permeability of the core mass are made to reduce angular skew and to improve uniformity of the uniaxial magnetic field. The variations generally involve a reduction in magnetic mass or permeability near a center of the core with respect to a periphery of the core. Cavities of various sizes and shapes but having symmetry with a magnetic axis can be formed in the core for this purpose.

Abstract: A magnetic lifting apparatus includes a plurality of magnetic substances, a plurality of rotor seat members, magnetic rotors, and permanent magnets alternately aligned with the plurality of magnetic substances. The apparatus includes stopping members for stopping rotation of magnetic rotors in a one way direction whereby upon lifting the operating member, the magnetic lifting apparatus either has a magnetic activity or no magnetic activity so as to attach to or release from an object, respectively.

Abstract: A multi-cathode electron beam plasma etcher is disclosed. The multi-cathode electron beam plasma etcher is comprised of: a vacuum chamber; several cathodes which are installed in the upper end of the upper part of the chamber and generates an electron beam in order to generate plasma in a large area; an acceleration electrode and a deceleration electrode which, form an acceleration and a deceleration tube structure in order to withdraw much of the electron beam, are arranged sequentially from the front of the cathode, and form an electrostatic lens when the differential voltage is applied respectively; first vacuum evacuation device to made the upper part of the chamber vacuum; an etching gas injection device which is installed in the side wall around the upper end of the lower part of the chamber; second vacuum evacuation device which is installed in the lower part of the chamber; and a holder of the etched body which is installed in the lower part of the chamber.

Abstract: A magnetic base including a rotary magnetic element, two symmetrical magnetic plate assemblies covered around the rotary magnetic element, and two non-magnetic blocks connected between the magnetic plate assemblies at different elevations; in which, each magnetic plate assembly consists of a stack of iron plates, each iron plate having two notches at one side near two opposite ends, and a flange at each notch; each non non-magnetic block has two opposite projecting portions respectively fitted into the respective notches of the iron plates and engaged with the respective flanges.

Abstract: A magnetic lifting apparatus includes a plurality of magnetic substances, a plurality of pairs of first permanent magnets, a plurality of rotors having a pair of second permanent magnets, respectively, and an on/off switch handle connected to the rotors whereby upon rotating the on/off switch handle, the magnetic apparatus has a magnetic activity or not so as to attach to or release from the object.

Abstract: A magnetic grab has a pair of vertically elongated magnetic pole pieces each having an upper end and a lower end. The pole pieces diverge downward symmetrically with respect to a vertical symmetry plane with the upper ends substantially more closely spaced than the lower ends. A plurality of nonmagnetic elements fixed to the pole pieces secure same together and a generally cylindrical rotor engaged between the pole pieces and centered on and rotatable about a rotor axis extending horizontally parallel to and between the pole pieces is formed by a pair of soft-iron bodies one of which is substantially thicker in a direction transverse to the axis than the other. One or more permanent magnets are sandwiched between the bodies and polarized generally diametrically of the rotor axis.

Abstract: A magnetic chuck assembly comprises top and bottom plates separated by a layer of non-magnetizable material, each plate having magnetizable sections separated by strips of non-magnetic material. A rotor mounted between the top and bottom plates carries a plurality of permanent magnets substantially symmetrically disposed therein. The magnets in each half of the rotor are of the same polarity but those in one half are of opposite polarity to those in the other. When the rotor is turned to a position in which all the magnets of like polarity in one half thereof lie between the magnetizable sections of the plates on the same side of the non-magnetizable strips, the sections become magnetized and hold a magnetizable workpiece in place on the edges of the plate. Switching the rotor to a position in which equal numbers of magnets of opposite polarity lie between the magnetizable sections serves to de-energize the latter and release the workpiece.

Abstract: An eddy-current braking apparatus including a brake drum; an annular support disposed within the brake drum; a plurality of shafts mounted for rotation on the support and each disposed substantially parallel to the axis of the drum the shafts being spaced apart in an annular array on the support; and a permanent magnet fixed to each of the shafts directly adjacent to the brake drum and each having opposite polarity poles, disposed on opposite sides of the shaft. Also included is a drive mechanism for producing rotation of the shafts between braking positions wherein the magnets produce magnetic circuits including the brake drum and non-braking positions wherein the magnets produce magnetic circuits substantially excluding the brake drum.

Abstract: A magnetic grab has a pair of pole pieces each forming a downwardly directed pole and formed adjacent the respective poles with horizontally extending semicylindrical seats having approximately the same center of curvature and open concavely inward toward each other. One of the pieces has an upwardly directed upper surface to one side of the seats and the other piece has a lower surface directed downward at the upper surface and also to the one side of the seats. A rotor fitting in the seats is provided with a plurality of high-flux rotor magnets polarized about respective axes extending generally diametrically of the rotor axis. At least one low-flux permanent magnet having a vertical polarization axis between the upper and lower surfaces has its north pole engaging one of the surfaces and its south pole engaging the other surface.

Abstract: A downhole seismic exploration device comprises a seismic detector such as a geophone and a magnetic clamp, supported by O-rings in an open cradle carrier which can be secured to a cable linking several such devices into an array. The array is lowered into a cased borehole and the magnetic clamps are operated to clamp the devices temporarily to the casing. Seismic signals detected by the geophones are transmitted to the surface via the cable, the O-ring supports acting to reduce or eliminate transmission of vibrations from the borehole fluid and the cable via the carrier to the geophone. The array is then unclamped and moved to another location in the borehole and the operation repeated. The magnetic clamp comprises a rotatable permanent magnet with radial poles disposed between a pair of parallel pole piece plates protruding on each side of the device and separated by non-magnetic blocks on eahc side of the magnet.

Abstract: A magnetic rotary locking mechanism for locking a plate or sheet-like member by placing it in tension which may be adapted to provide a self-tensioning locking device for securing a printing plate to a printing cylinder in a rotary printing press. The base and rotatable bar each have formed therein a plurality of magnetic strips which generate a plurality of magnetic fields so that the bar magnetic fields are attracted to the base magnetic fields at a first angular position of the bar with respect to the base and are repelled by the base magnetic fields at a second angular position of the bar with respect to the base.

Abstract: A downhole seismic exploration device comprises a seismic detector such as a geophone and a magnetic clamp, supported by Q-rings in an open cradle carrier which can be secured to a cable linking several such devices into an array. The array is lowered into a cased borehole and the magnetic clamps are operated to clamp the devices temporarily to the casing. Seismic signals detected by the geophones are transmitted to the surface via the cable, the O-ring supports acting to reduce or eliminate transmission of vibrations from the borehole fluid and the cable via the carrier to the geophone. The array is then unclamped and moved to another location in the borehole and the operation repeated. The magnetic clamp comprises a rotatable permanent magnet with radial poles disposed between a pair of parallel pole piece plates protruding on each side of the device and separated by non-magnetic blocks on each side of the magnet.

Abstract: A switch drive for a rotary switch includes a driven shaft at its input and a switch drive shaft at its output. The input shaft supports a lever for transmitting the movement of the input shaft to a pinion fixedly connected to the lever. The pinion rolls along an internal toothing and supports an engaging member which is in slidable engagement with a switch arm connected to the switch drive shaft.

Abstract: Novel microorganisms can be used to convert n-eugenol to coniferylaldehyde.