Abstract: A device for displaying the loose coupling between magnetic fields is provided, comprising a first disk having a plurality of magnetic elements attached to the first disk so that the magnetic field of the magnets extend radially from an outer edge of the first disk, a second disk having a plurality of magnetic elements attached to the second disk so that the magnetic field of the magnets extend radially from an outer edge of the second disk so that the magnets on the disks are loosely coupled to each other, the strength of the loose coupling depending on the orientation of the magnets with respect to each other, and a rotatable control member having a magnetic element attached to an end of the control member, the control member magnet being rotated to a first position such that a predetermined pole of the control member magnet is located adjacent to the magnets on the first disk causing a magnetic coupling of the magnet on the control member to the magnets on the first disk so that loose coupling and the chao

Abstract: An adjustable coupler has a group of magnet rotors separated by air gaps from a group of conductor rotors. The air gaps are adjusted by axial movement of one of the groups relative to the other to vary the slip of the coupler and achieve a constant load speed at various load torques.

Abstract: A magnetically induced coupling and drive apparatus (10) useful, for instance, for conveying webs utilizes magnetically coupled first and second rotatable elements (20,32)and means for rotating one of the rotatable elements (20, 32) which causes the simultaneous synchronous rotation of the other rotatable element. Both first and second rotatable elements (20, 32) include a magnetic core (22, 34), a bonding layer (28, 36) at least partially surrounding the magnetic core (22, 34), and a wear and abrasion resistant layer (26, 32) surrounding the bonding layer (28, 36). The means for rotating (60) rotating one of the rotatable elements (20, 32) includes a ferromagnetic stator member (62) integrally associated with one of said first and second rotatable elements (28, 36).

Abstract: A drive for rotating equipment that does not require internal or external mechanical seals and obviates the necessity to have internal shaft and bearings, eliminating internal lubrication problems and can be used with different types of prime movers is provided. A driven rotor, connected to the prime mover, with mounted horizontal stop rings, vertical stop rings, permanent magnet for floating rotor position, and permanent rotor drive magnet is driven by a driver rotor mounted with strain gauge and permanent magnet, electromagnet for driven rotor position and drive, strain gauges signal transmission rings, and electromagnet current transmission rings. The driver rotor, by using the signal generated by the strain gauges, varies current to the electromagnets controlling magnetic field forces to float the driven rotor. When the unit is shutdown the driven rotor rests on the vertical stop rings uncoupled.

Abstract: A vehicle transmission system comprising a gear box having an outlet shaft which drives a universal joint associated with an eddy current electrical retarder having an annular inductor stator cantilevered-out from the case of the gear box together with a rotor constituting a magnetic core and which includes two wheels on either side of the stator. The wheels are fixed to two ends of an intermediate tube surrounding the universal joint, one of its ends also being fixed to a slab that is secured to the outlet from the gear box.

Abstract: Systems employing passive magnetic bearing elements having minimal power losses are provided. Improved stabilizing elements are shown, employing periodic magnet arrays and inductively loaded circuits, but with improved characteristics compared to the elements disclosed in U.S. Patent No. 5,495,221 entitled "Dynamically Stable Magnetic Suspension/Bearing System." The improvements relate to increasing the magnitude of the force derivative, while at the same time reducing the power dissipated during the normal operation of the bearing system, to provide a passive bearing system that has virtually no losses under equilibrium conditions, that is, when the supported system is not subject to any accelerations except those of gravity.

Abstract: A self holding type connecting device comprising an armature which is disposed movably in an axial direction, a magnetic path member having a cross section formed along a closed loop and having an axial space wherein axial movement of the armature is permitted, a permanent magnet secured to the magnetic path member and forming two kinds of magnetic flux which pass through the armature and the magnetic path member, an electric magnetic coil which forms magnetic flux for moving the armature in an axial direction against the two kinds of magnetic flux, and switch for switching direction of the magnetic flux from the electric magnetic coil. In the device, decrease of connecting force due to abrasion of pads does not occur and power consumption can be remarkably reduced.

Abstract: In a rodless cylinder device, an inside moving unit is slidably inserted in a cylinder and an outside moving unit is slidably inserted on the cylinder, the inside and outside moving units being magnetically coupled. The inside moving unit has inner sliding guide rings on the two opposite ends with an inside magnet device disposed therebetween. A sealing ring or packing is provided between the inside magnet device and one of the inner sliding guide rings in such a manner that a grease retaining space is formed between the packing and the inner sliding guide ring. While the outside moving unit is moved together with the inside moving unit under the magnetic coupling force between the two moving units, the packing is lubricated by grease supplied from the grease retaining space, whereby the lubricating performance of the rodless cylinder is improved.

Abstract: The vehicle transmission system comprises a gear box having a case with a closure plate screwed thereto and an outlet shaft passing through the closure plate and associated with a fork of a universal joint, in association with an electrical eddy current retarder including a stationary inductor and a rotary core, which inductor is cantilevered out from the case by means of a framework. The framework is fixed to the case by screws that also serve to fix the closure plate thereto, and the rotor has a support member which is fixed to the rear face of the fork of the universal joint. The structure and the disposition of the gear box and of the fork of the universal joint are thus independent of whether or not the electrical retarder is present.

Abstract: An adjustable coupler has a group of magnet rotors separated by air gaps from a group of conductor rotors. The air gaps are adjusted by axial movement of one of the groups relative to the other to vary the slip of the coupler and achieve a constant load speed at various load torques.

Abstract: An apparatus for electromagnetically and rotationally vibrating a rotary body that is supported by bearings. The apparatus comprises a ring-shaped magnet bipolarly magnetized and mounted coaxially on a shaft of the rotary body, a ring-shaped stator having a coil and adapted to generate a rotating magnetic field by controlling an electric current supplied to the coil, and a frequency variable vibration power source adapted to supply alternating electric power to the coil in the stator. The distance between a location of a magnetic pole in the stator and an axis of the shaft is different than the distance between a location of a magnetic pole in the magnet and the axis of the shaft. The magnet and the stator are disposed so as to be adjacent to each other. Thus a rotational exciting force is applied to the rotary body by an interaction of the rotating magnet field generated by the stator with the magnet.

Abstract: An eddy current drive has an electromagnet and an armature. Either one of the electromagnet or the armature is coupled to a motor shaft so as to rotate therewith, while the other is coupled to a load portion. The motor can rotate at a continuous speed, while the speed of the load portion can vary by varying the energization of the electromagnet, so as to vary the coupling between the electromagnet and the armature. The rotation of the motor shaft generates electrical current that is used to energize the electromagnet. The amount of the electrical current that is provided to the electromagnet can be varied to vary the output speed of the load portion. The electrical current can be generated by a member that rotates in unison with the electromagnet. A rotary coupler provides a speed control signal to vary the amount of current that is provided to the electromagnet. The rotary coupler can also provide power from the rotating generator to a stationary controller.

Abstract: An electric drive for small vehicles, especially wheelchairs, includes a d.c. motor, which is arranged as a wheelhub motor in the running wheel of the small vehicle. Efficiency and manufacturing costs are improved, while ensuring simple assembly, wherein the possibility of automatically locking the running wheels is provided, along with a short and lightweight design. The d.c. motor is an external rotor motor, whose external rotor forms the wheelhub or the wheel rim of the running wheel. The stator of the d.c. motor is stationarily connected to the small vehicle via a brake housing (3). A central spring pressure brake is provided which can be released electromagnetically and manually and brakes the external rotor of the d.c. motor in the case of a power failure.

Abstract: A rotor is formed by a rotary frame 3 composed of a nonmagnetic material, a field magnet 5, a yoke 4 and an auxiliary yoke 7. A disk 12 is mounted on the rotary frame 3. An opening 4b is formed in the yoke 4 to thereby cause attractive magnetic flux from the field magnet 5 to effectively act on a clamping yoke 13 of the disk, so that the disk 12 can be firmly clamped. The yoke 4 covers the circumferential part of the field magnet 5 on its disk 12 side to thereby cut off magnetic flux leakage toward the disk 12, so that its adverse effect on the recording surface of the disk 12 can be avoided. The auxiliary yoke 7 so arranged that a stator coil 6 is interposed between the auxiliary yoke 7 and the field magnet 5 is secured to the rotary frame 3 to thereby increase effective rotating magnetic flux so that output torque is increased.

Abstract: A self-adjusting magnetic bearing automatically adjusts the parameters of an axially unstable magnetic bearing such that its force balance is maintained near the point of metastable equilibrium. Complete stabilization can be obtained with the application of weak restoring forces either from a mechanical bearing (running at near-zero load, thus with reduced wear) or from the action of residual eddy currents in a snubber bearing. In one embodiment, a torque is generated by the approach of a slotted pole to a conducting plate. The torque actuates an assembly which varies the position of a magnetic shunt to change the force exerted by the bearing. Another embodiment achieves axial stabilization by sensing vertical displacements in a suspended bearing element, and using this information in an electrical servo system.

Abstract: An electromagnetic brake system includes a motor having a rotor with a rotatable disk fixed to the rotor and an electromagnetic brake disposed about the disk to selectively prevent rotation of the rotor. The electromagnetic brake is carried on a resilient element so that it is suspended relative to the disk and isolated from the remainder of the system reducing the propagation of structural and airborne noise generated by actuation of the electromagnetic brake.

Abstract: A composite barrier can and method of making same for use with industrial magnetic drive pumps. The barrier can is used to prevent leakage between the inner magnet assembly attached to the pump and the outer magnet assembly attached to the pump drive or motor. The barrier can is a non-metallic, composite barrier can composed of fiber and resin and includes a pole piece. The nonmetallic material and high strength configuration of the composite barrier can permits pump operation at high speeds and pressures with negligible eddy current generation. Using the composite barrier can results in minimizing heat developed in the coupling area and minimizing horsepower required from the motor. A resistance temperature detector is operatively positioned on the exterior of or within the fiber layer of the can such that the sensing portion of the detector is located proximate the closed end of the can. A method of manufacturing the barrier can is also disclosed.

Abstract: An electromagnetic torque coupling, particularly for connecting a torquing tool to a motor, for applying a predetermined torque to the tool; the joint presenting a pair of axial rotors fitted idly, coaxially in tandem, and mechanically disconnected from each other inside a casing, and respectively connected to the motor and the tool; the two rotors presenting respective opposite disk-shaped ends defined by respective opposite front faces facing each other and separated by a predetermined axial clearance, and surrounded radially on the outside by an electromagnet fitted to the casing, so that the disk-shaped ends are immersed in a predetermined magnetic field, the flux lines of which are linked via an air gap defined by the predetermined axial clearance; the front faces each presenting a respective ring of radial face teeth; the teeth in each ring presenting ridges defined by respective coplanar, flat face surfaces defined by annular wedges; and the axial clearance being defined between the surfaces of the tee

Abstract: Bearing systems, such as magnetic bearings, are widely used today in a variety of applications. All bearing systems are, however, subject to failure. Therefore, backup bearing systems are often utilized in conjunction with a main bearing system in order to provide backup to the main bearings if they should fail. The backup bearing system for the re-centering of magnetic bearings includes a first conical member disposed about an axis and having at least one bearing disposed substantially therein; a second conical member spaced from the first conical member and disposed about the axis, the second conical member having at least one bearing disposed substantially therein; and an actuator assembly spaced from the second conical member and bearing in a first or operative position.

Abstract: A completely novel rotary apparatus is provided which can rotate a composite rotor at a high speed by utilizing the magnetic force, the composite rotor being comprised of a plurality of ring-shaped rotors arranged concentrically with each other.

Abstract: A T-S converter is composed of a first rotor which has a first control coil, a second rotor and a stator which has a second control coil. The second rotor has a first magnetic field member (such as laminated sheets of ferromagnetic material) which supplies the first control coil with magnetic field and a second magnetic field member (such as laminated sheets of ferromagnetic material) which supplies the second control coil with magnetic field. The first and second control coils are energized to drive the second rotor to rotate at a set speed with a set torque according to vehicle running condition. The first and the second control coil are also energized to generate battery charging current when the vehicle speed is decreased and the second rotor is driven by the vehicle wheels.

Abstract: To make the turning "on" and "off" of a clutch in an electro-magnetic clutch smoother, the electro-magnetic clutch has a first rotating member rotatable in response to the driving force applied to the input axis, and a second rotating member arranged opposite to the first rotating member and freely rotatable about the rotation axis of the first rotating member and coupled to the output axis. A movable member is coupled to one end of a return spring and is disposed between the first rotating member and the second rotating member for movement along the rotation axis of the first rotating member. An electric coil generates a force to drive the movable member along the rotation axis of the first rotating member. Cylindrical auxiliary slide members are arranged approximately at equal intervals on the movable member and are disposed between the movable member and the second rotating member.

Abstract: An adjustable coupler has a rotary magnet rotor with magnet modules gaps from electroconductive elements on an electroconductive rotor. The magnet modules each have two side-by-side permanent magnets with their respective poles reversed and have a neutral plane between the magnets. The magnet modules can be turned for torque adjustment between a maximum torque position in which the neutral planes intersect at the rotary axis of the coupler, and a minimum torque position at which the magnet modules are turned 90 degrees from the maximum torque position.

Abstract: A disk shaped passive magnetic damper incorporating a damper vane having spaced apart vertical and horizontal portions forming a castellated shape. Permanent magnets are positioned between the vertical portions of the damper vane for providing magnetic fields that interact with the vertical and horizontal portions of the damper vane. A keeper portion extends from one end of each magnet to a position over one adjacent horizontal vane member.

Abstract: A concentric-double-shaft simultaneously rotating apparatus in which a part of the force for driving an inner shaft to rotate is obtained by a device other than a rotation controlled motor to thereby reduce the capacity of the rotation controlled motor to attain reduction in size of the apparatus, increase of stiffness, and so on. The concentric-double-shaft simultaneously rotating apparatus includes at least one permanent magnet which is attached onto an inner circumferential surface of an outer shaft, and a secondary conductor such as a copper pipe, or the like, is provided on an outer circumferential surface of the inner shaft to create an induced current flow.

Abstract: An oscillatory drive incorporating the invention includes a driven rotor that is mounted on a shaft and includes plural driven permanent magnets disposed thereon. A spring arrangement is coupled to the driven rotor and limits both clock-wise (CW) and counter-clockwise (CCW) rotation thereof. A first driving rotor includes first driving magnets, is mounted for rotation on the shaft and is positioned to a first side of the driven rotor. A second driving rotor includes second driving permanent magnets, is mounted for rotation on the shaft and is positioned to a second side of the driven rotor. The drive mechanism imparts a CW rotation to the first driving rotor and a CCW rotation to the second driving rotor. The first driving permanent magnets coupling to the driven permanent magnets causes a CW rotation of the driven rotor until the spring arrangement terminates the CW rotation and causes a reversal of rotation direction in the CCW direction.

Abstract: An electrically self-propelled pulsating multi-directional magnetic brush having an insert for use in toner deposition or removal devices associated with imaging machines of the electrostatic type (dry or liquid), the magnetic type, and the reprographic type. The insert further has skewed magnetic sections, made of permanent magnets or electro-magnets, therearound. The insert is used in conjunction with a permanent or electro-magnet and is contained within a rotatably mounted drum to provide an insulation for the drum and to further provide a driving force to uniformly rotate and multi-directionally pulsate developer mixture material around the drum.

Abstract: A magnetic coupling includes a cylindrical housing, a spindle, an adjusting plate, two pairs of permanent magnet discs, two hysteresis material discs, and a screw member. The spindle is rotatably supported at its axial position by the housing. The adjusting plate is rotatably supported by the spindle to partition an interior of the housing into two sections in a direction of the spindle. The two pairs of permanent magnets are provided in the two corresponding sections to respectively oppose each other. One of each pair of permanent magnet discs is fixed in the housing and the other thereof is fixed to the adjusting plate. Each permanent magnet disc has magnetic poles with polarities that alternate in a circumferential direction. The hysteresis material discs are fixed to the spindle and arranged between the corresponding pairs of permanent magnet discs at a predetermined gap. The screw member fixes the adjusting plate to the housing.

Abstract: A power transfer assembly has a magnet rotor with permanent magnets co-acting with a pair of electroconductive rings on a conductor rotor. The rotary axes of the two rotors are in laterally spaced parallel relation with one of the rotors being greater in diameter than the other.

Abstract: A multi-rotor A.C. electric drive device comprises a stator capable of producing a rotating or an alternating magnetic field and at least two rotors capable of producing an electromagenetic torque at asynchronous speed. The rotors are respectively called the main rotor and the auxiliary rotors. In low speed operating mode of said device, the electromagnetic torque of the auxiliary rotor is amplified through a transmission portion and drives an output element together with the main rotor; after the auxiliary rotor is accelerated to the synchronous speed, an automatic unloading device releases the auxiliary rotor from the driving engagement with the output element. Examples illustrating several types of electromagnetic portion, transmission portion and the automatic unloading device are given.

Abstract: A variable electric brake assembly applies braking force to the wheel of a materials handling vehicle through a rotor shaft. A brake rotor rotates on the rotor shaft and is located within the brake assembly. When the vehicle is in a parked position, both an inner coil and an outer coil are de-energized. With the inner coil de-energized, an inner armature is not attracted to the inner coil, and the inner armature is forced against the brake rotor by springs to prevent the rotation of the brake rotor. When the vehicle is moving in a free running position, the outer coil remains de-energized while the inner coil is energized. With the inner coil energized, the inner armature is attracted to the inner coil and overcomes the force of the springs, thereby allowing the brake rotor to freely rotate. When the vehicle undergoes dynamic braking, both the outer coil and the inner coil are energized.

Abstract: The present invention relates to a system for driving two mechanical members in rotation about an axis by magnetic coupling of the attractive type, the system comprises respective magnetic elements secured to each of said mechanical members, the two magnetic elements being concentric, one of them being made up of two identical magnetic rings of minimum radius R.sub.3 and of maximum radius R.sub.4, and the other one of them being made up of a magnetic ring having a minimum radius R.sub.1 and a maximum radius R.sub.2, with its midplane perpendicular to the axis of rotation being offset by a distance d from the midplanes of each of said two identical rings. Each ring possesses magnetization in a direction contained in a plane that is perpendicular to the axis of rotation. Each ring also possesses N magnetic poles uniformly distributed around said axis of rotation. The ratio 2d/.vertline.(R.sub.3 +R.sub.4)-(R.sub.1 +R.sub.2).vertline. lies in the range 0.2 to 0.8.

Abstract: A magnetic coupling device has an electroconductive rotor presenting a band of electroconductive material and has a magnet rotor with permanent magnets which are slide-mounted to move radially outward responsive to centrifugal force in opposition to a spring bias. When the magnet rotor is stationary the magnets are radially inward of the orbit of the electroconductive band, and when the magnets have moved outwardly when the magnet rotor is rotating, the magnets are spaced by an air gap from the electroconductive band so that eddy currents are induced in the band resulting in coupling of the rotors. The electroconductive rotor preferably has two such bands positioned on opposite sides of the magnet rotor. The rotors may have sheaves mounted thereon.

Abstract: A universal motor (18) for a power tool (10) has a stator assembly (22) and an armature (24). The stator assembly includes a plurality of interconnected field windings (28-34) to which current is supplied to run the motor. The armature has a commutator (36) including brushes (40a, 40b) for circulating current through the armature. To quickly and safely brake the motor, without excessively damaging the brushes, a switch (16) is interposed between an AC power source for the motor and the armature. In one embodiment, the switch shorts the armature during braking. In this embodiment, the switch includes sets (56, 58, 60) of electrical contacts by which the inner field windings (28, 30) are connected in series with the outer filed windings (32, 34); and the field windings are series connected with the armature.

Abstract: In the electric motor/generator arrangement described in the specification, a hollow cylindrical generator rotor is mounted on an input shaft connected to an internal combustion engine and a hollow cylindrical electric motor rotor is connected to an output shaft. Both rotors have circumferential rings of permanent magnets of alternately opposite polarity, and the rings are disposed in axially-spaced relation. A stator has at least one switchable short-circuit winding arranged so as to be displaceable by a displacement device over a wide range adjacent to the permanent magnets of the rotors. Magnetic field sensors disposed between the permanent magnets in each ring detect the polarity of adjacent permanent magnets in the other ring, and the short-circuit winding is closed or opened as a function of the sensor signals.

Abstract: A magnetic coupler has a magnetic disc containing permanent magnets located between two electroconductive plates and separated therefrom by air gaps. The magnetic disc and electroconductive plates are mounted on coaxial or parallel-spaced input and output shafts so that rotation of the input shaft causes rotation of the output shaft by way of magnetic friction between the permanent magnets and the electroconductive plates.

Abstract: A magnetic drive arrangement comprising a plurality of magnetically cooperating parts which are moveable relative to one another, one of the parts being connected to a drive shaft and one of the parts being stationary, the fields produced by the permanent magnets being modulated by soft-magnetic flux-carrying parts which include at least one toothed iron yoke, wherein structures are provided on both sides of the iron yoke to generate magnetic fields by means of permanent magnets at the sides facing the iron yoke, with the magnetic fields alternatively exhibiting north poles and south poles along the circumference.

Abstract: The invention relates to a retaining means for magnets of magnetic clutch for pump drives and has an outer rotor receiving magnets on its inner side and an inner rotor receiving magnets on its outer side, the magnets being disposed evenly around the periphery of the rotors, while disposed coaxially of both sides of the magnets are thin annular disks having a number of straps which partially engage over the magnets on the side remote from the rotor, at least one strap engaging over one magnet in each case.

Abstract: An apparatus for connecting a wire to a contact element by deformation of clamping members by means of pressure members of a crimping tool arranged in a press has a single-phase ac motor (82) as its drive motor, which has an additional independent braking winding (96) which can be supplied with a braking voltage. That provides for accurate positioning which is reliable in a continuous mode of operation, while affording a compact structural size.

Abstract: A torque/force transfer apparatus which includes an annular ring having tein permanent first magnets side by side about the interior of the ring. The first magnets are arranged so as to alternate in polar orientation to present an inside circumference of alternating north and south magnetic poles. A cylindrical central member has therein permanent second magnets side by side about the exterior of the central member. The second magnets are arranged so as to alternate in polar orientation to present an outside circumference of alternating north and south magnetic poles. A strut assembly is pivotally attached to a center of a side of the central member and has arms extending radially outwardly from the central member center and is provided with planetary members rotatably connected each to one of the arms.

Abstract: A magnetic gear configuration utilizing non-metallic magnetic material about a circumference of a rotatable member is disclosed. A plurality of magnetic units may be spaced around the circumference of the rotatable member. Each magnetic unit may extend along a direction substantially parallel to the central axis of the rotatable member and each magnetic unit may be inversely aligned to its adjacent magnetic unit. The magnetic units may be equidistantly spaced from one another and each magnetic unit contains a north and south pole. Gear train configurations may be constructed by utilizing gears having similarly spaced magnetic units where inversely aligned magnetic units attract one another to facilitate gear rotation.

Abstract: A mechanical power transmission assembly which uses an electro-magnetic system with internal electrical feedback to obtain the desired torque speed characteristics at the load shaft is presented. The assembly comprises of two coaxial magnetic rotating parts having an air gap between them with one part capable of rotating over the other at different speeds. One of the rotors is connected to the driving engine and the other rotor to the load shaft. The magnetic parts house electrical windings which are connected to each other through means such as commutators or slip rings and brushes allowing direct or alternating currents, as desired, to circulate in the windings and with means for controlling the currents in them. The assembly system is capable of being used for a variety of purposes besides mechanical power transmission, such as for staffing the engine and supplying electrical power.

Abstract: A compact assembly of two magnetic couplers for coupling two coaxial angular shaft movements through a vacuum barrier. Each coupler includes two concentric rings of radially oriented magnets, arranged to provide magnetic coupling in a radial direction between corresponding magnets in the rings. A relatively large number of magnets in each ring ensures stiff coupling between rings, but unwanted circumferential coupling between adjacent magnets in each ring is minimized by the presence of a flux ring associated with each ring of magnets. The flux rings provide a return path for radial magnetic flux lines between the rings. Cross-coupling between the couplers is minimized by the presence of a magnetic shield on each ring of magnets. The shields permit the couplers to be located in close proximity on their common axis of rotation. For corrosion resistance, each ring of magnets on the vacuum side of the barrier is housed in a stainless steel enclosure.

Abstract: A mechanism for transferring torque from a motor to a gear train through a magnetic hysteresis slip clutch has a feature for disconnecting the motor from the gear train. A cup element of the clutch is carried on a shaft and can be shifted along the shaft's axis. The cup element has a magnetic member on its outer surface and an interior hysteresis layer. An electromagnet can magnetically apply force to the magnetic member to axially shift the cup element, and by so doing can shift a drive gear carried on the cup element into and out of mesh with a first gear of the gear train. In a preferred embodiment, the cup element shifts the drive gear into mesh with the gear train's first gear when the electromagnet is energized and magnetically applies force to the magnetic member, and allows magnetic force applied to the hysteresis layer by a permanent magnet element of the clutch to shift the drive gear into its unmeshed position when the electromagnet is deenergized and does not apply force to the magnetic member.

Abstract: A magnetic feedthrough manipulator adapted to be sealed to a chamber for inserting a manipulator shaft capable of rotational and longitudinal movement. The shaft is axially coupled to a ferromagnetic armature having an even number of longitudinal surface splines freely movable within a nonmagnetic tubular housing and which is controlled by alternately polarized magnets in a frame that slides and rotates on the outer surface of the housing. Two or more manipulator shafts may be controlled independently by a like number of armatures in the same housing.

Abstract: A method for transferring power employs moving a magnetic field past a nonmagnetic electrical conductor surface. In one instance, a magnet is mounted on a rotational axis, with the periphery of the magnet in close proximity to the object. The object may also be on a rotational axis. Rotating of the magnet causes rotation of the object. In another instance, an aluminized layer is placed on a conveyor belt. The rotating magnet is positioned closed to the conveyor belt layer to cause the conveyor belt to move.

Abstract: A hysteresis coupling comprising a magnetic cylinder (1) made of a permanent-magnetic material and a thrust ring (4) made of a hysteresis material. The thrust ring (4) is fixedly connected to a thrust ring holder (5) and separated from the magnetic cylinder (1) by an air gap (3). The hysteresis coupling transmits the torque from a drive (7) to a pinion (9) which is part of the thrust ring holder (5). The thrust ring (4) is surrounded on its outside by non-magnetic material of high density in order to increase the moment of inertia (5) for noise reduction.

Abstract: The rotor of a shaded-pole motor carries a braking ring with a radially projecting stop lug adapted to coact with a pivoted pawl to brake the rotor to a stop when the motor is de-energized. The pawl carries a pole piece which, upon energization of the motor, is magnetically attracted toward the stator thereof to cause the pawl to pivot to a released position clear of the stop lug. The braking mechanism requires relatively few components, and those components may be used universally either with a motor with a clockwise rotatable rotor or a motor in which the rotor rotates in a counterclockwise direction.

Abstract: A universal motor comprises an armature 13, brushes 15, 17 and stator or run windings 19, 21. To provide a permanent magnet actuated dynamic brake circuit 22, permanent magnets 23, 25 are located, respectively, in opposed stator poles 27, 29. In the run mode, power is supplied to stator windings 19, 21 from a rectified ac power supply 33, 35. In the brake mode, brake circuit 22 is actuated by short circuiting armature 13. Due to back EMF, the current flows through armature 13 in a direction opposite to that produced by the rectified ac input in the run mode to provide dynamic braking. To precisely and durably mount magnets 23, 25 in stator poles 25, 27; straps 69, 71 extend around and completely entrap magnets 23, 25 in slots 65, 67.

Abstract: On one side of a valve shaft, there are provided an accelerator drum connected to an accelerator pedal by an accelerator wire, a return spring for urging the accelerator drum in a valve closing direction, and an accelerator sensor for detecting rotation of the accelerator drum and transmitting a detected signal to a host system. On the other side of the valve shaft, there are provided a large-diameter gear and an opening sensor. An armature of a solenoid clutch is attached to the gear and held on a motor shaft via a slide bearing. Thus, the motor, the solenoid clutch and the throttle valve are arranged into a U-shaped form for interconnection through four gears.