Abstract: An electromagnetic adjusting device for automatic transmissions of motor vehicles has an electromagnet having a magnetic coil, a substantially cup-shaped housing which surrounds the magnetic coil and is composed of a ferromagnetic material, the housing having a housing bottom, a ferromagnetic central part which extends from the housing bottom and supports the magnetic coil, and a movable armature located before the central part and leaving a working air gap so as to form with the housing and the central part a magnetic circuit which has a magnetic resistance for a magnetic flux, and means for changing the magnetic resistance, the means for changing the magnetic resistance including an axial depression provided in the central part and an axially displaceable ferromagnetic filling member inserted in the depression and limiting with a bottom of the depression an auxiliary air gap.

Abstract: A transverse flux drive includes a first component and a second component which is rotatable with respect to the first component. A pair of transverse flux motor units are coupled between the first and second components. Each motor unit includes a plurality of U-shaped armature elements which are coupled to the first component and which enclose an circumferentially extending exciter winding. Each motor unit also includes a plurality of permanent magnet pole elements coupled to the second component. The pole elements of one motor are axially movable to attenuate the magnetic flux coupling between the elements of the motor.

Abstract: A dynamo-electric machine has a stator with a primary winding and a rotor with a field magnet and a shaft. the field magnet includes a first field magnet having diferent polarity magnetic poles sequentially arranged in a rotation direction and a second field magnet having diferent polarity magnetic poles sequentially arranged in a rotation direction. The machine further has a mechanism for shifting the first and the second field magnets in axial and rotation directions.

Abstract: The present invention provides an electric rotary machine including a rotor having a field magnet provided on a shaft, the field magnet comprising a first field magnet with magnetic poles of sequentially different polarities arranged in a rotational direction, a second field magnet with magnetic poles of sequentially different polarities arranged in a rotational direction wherein the second field magnet is rotatable on the shaft and displaced axially with respect to the first field magnet.

Abstract: A rotary electrical machine comprising a stator (10) and at least one rotor (12) having a plurality of permanent magnets (14). The rotor consists of a rotor disc, at the outer edge of which the permanent magnets are mounted. The rotor disc (12) is provided with airgap varying means (19) which are angled towards the stator (10) and mounted on the rotor hub (24) for rotation therewith. When the rotor is stationary, the airgap (30) between the magnets (14) and the stator (10) is at a minimum. In operation, as the speed of rotation of the rotor (12) increases, a centrifugal force is generated which acts to bend the airgap varying means (19) and, therefore, the rotor disc (12) back, away from the stator (10), thereby drawing the magnets (14) away from the stator and increasing the size of the airgap (30). The increase in size of the airgap results in a corresponding decrease in flux and therefore a decrease in the maximum output voltage for that rotor speed.

Abstract: A mangle magnetic structure is composed of a plurality of transversely magnetized parallel cylindrical rods forming a cylindrical shell defining an interior cavity filled with insulated wires in parallel to the mangle's principal axis. Two semicircular sections composed of the solid copper wires, within the interior cavity, are physically separated and insulated from each other by a barrier. The transversely magnetized parallel cylindrical rods are rotatable around each rod's individual axis, causing an interior magnetic field within interior cavity and the semicircular sections. The transversely magnetized parallel cylindrical rods are rotated so that the lines of force emanating from them produce an Alternating Current axial electromotive force to drive current through the semicircular sections and to an external load. In one embodiment, two sets of concentric transversely magnetized parallel cylindrical rods form the magnetic shell.

Abstract: For providing an electric rotating machine, with which can be maintained the rotational symmetry of the stator iron or steel sheets, as well as the symmetry of the magnetic circuit, without increasing of the weight of the stator, wherein an electric rotating machine comprising: a stator having a stator core 101 being formed by fixing a laminated body of stator iron or steel sheets, and stator coils 102; a rotor 103 having a rotation shaft of; a frame 105 for receiving the stator therein; and end brackets 106 and 107 having through bolt holes 34 and outer attachment bolt holes 31, wherein the stator is fixed to the end brackets 106 and 107 by through bolts 14, and the electric rotating machine is installable onto an outside by means of outer attachment bolts, and the stator iron or steel sheet 1 is in a shape being symmetric both sides and upside down with axes B1-B4 and comprises a main body portion 11 and 15 and corner portions 12 in which are formed through bolt holes 13, the through bolt holes 13 are provi

Abstract: An electronically commutated motor is described that has a stator, carrying at least two winding phases, multiple magnet poles and grooves and a rotor, in which a defined position between the rotor and the stator can be detected by way of a position sensing device. A rotation speed and power output of the motor can easily be influenced by the fact that the magnet poles have regions with air gaps of different heights from the rotor; and that onset times of a temporally successively occurring energization of the at least two winding phases can be varied in terms of the position between the rotor and the stator and/or the energization duration of the at least two winding phases.

Abstract: A permanent magnet alternator employing a mechanically regulated output. The alternator contains a rotor, or a flywheel which houses a plurality of permanent magnets. A rotating magnetic flux field is created by the rotation of the flywheel. A stator assembly, including a plurality of windings or coils is disposed concentrically with the rotor and adjacent to the rotating flux field. The coils produce an electrical output based on their exposure to the rotating flux field. A control assembly is disposed concentrically within the stator assembly. The stator assembly is rotatably coupled to the control assembly and becomes axially displaced relative to the magnetic flux field as a result of rotation relative to the control assembly.

Abstract: A brushless motor with axial air gaps is rotated at speeds higher than that of conventional motors by using magnets adjustable in the radial direction. The axial gap machine includes one or more stators, containing windings that conduct electrical currents, and one or more rotors, with sets of permanent magnets rotating on a shaft adjacent the stators. The magnets are supported by bearings in a magnet carrier on the rotor so that the magnets can move radially under the action of centrifugal force opposed by springs. The radial movement of the magnets reduces the number of lines of flux of the magnets that can interact with those created by the electrical currents flowing in the windings. Reducing the flux interaction allows an increase in the speed capability of the machine. Linear radial guides inside the magnet carrier restrict movement of the magnets in all directions other than the radial direction and stops limit outward and inward movement.

Abstract: A permanent magnet motor includes a rotor having a permanent magnet and a stator core having circumferential teeth the number of which is 2n where n is an integer equal to or larger than 2, the teeth including first teeth the number of which is n and second teeth the number of which is n, the first and second teeth being circumferentially regularly disposed alternately. Each first tooth has a head with an end face opposed to the rotor and formed generally into the shape of an arc about a center of rotation of the rotor so that an air gap defined between said end face and a surface of the rotor opposed to said end face is circumferentially uniform. Each second tooth has a head with an end face opposed to the rotor and shaped so as to be gradually departed farther away from an opposite surface of the rotor as the head extends from its circumferentially central portion toward both circumferential ends.

Abstract: A core configuration for use with an electromagnetic machine including first and second pluralities of laminations, each of the first and second pluralities having different properties and/or operating characteristics, the first and second pluralities interleaved together to form a core having desired core properties which are a combination of the properties of the first and second pluralities.

Abstract: The present invention resides in a radial air gap machine with a serrated air gap that can minimize external axial forces. This is accomplished by controlling the relationship between the air gap surfaces in the stator and rotor sections. To control the relationship between the stator sections and the rotor section in a vertical motor a bushing with external and internal thread of opposite hand with the internal thread having a steeper helix angle is twisted into a bearing mount and over a motor shaft. Thus, a vertical hollow shaft motor with magnetic balance thrust is adjusted.In axial air gap machines, the magnetic force produced in the air gaps can also be utilized to compensate for axial loads.

Abstract: An electric motor is provided with active hysteresis-based control of winding current. The motor has an efficient stator winding arrangement, as well as at least one adjustable air gap. Also provided is a stator, windings and air gap adjustment mechanism, as well as a method and system for controlling the torque produced by the motor using active hysteresis-based control of the motor's winding currents. The stator has its windings distributed among arc sections, the windings in each arc section being associated with only one phase of the motor. The hysteresis-based control of winding current is active in that a bandwidth or spread of the hysteresis band is adjusted depending on at least one of several selectively determined factors. The motor and its associated components are particularly well-suited for use in an electrically powered vehicle, as well as in hybrid vehicles using both electric power from a battery and electric power derived from a fuel-burning engine.

Abstract: A brushless D.C. motor assembly includes a balancing sheet made of material with magnetic conductivity, the balancing sheet having an axle hole joined together with a stator by an axle tube, a rotor rotatably received in the axle tube, the rotation thereof controlled by a controlling device, and the rotor having a annular permanent magnet with a diameter substantially the same as the diameter of the balancing sheet wherein the permanent magnet and the balancing sheet attract each other.

Abstract: A reluctance type rotating machine includes a stator having armature windings arranged on an inner periphery of the stator, a rotor having projection portion forming magnetic poles, and a plurality of permanent magnets arranged on both side faces of the projection portions. Owing to the provision of the permanent magnets, it is possible to restrain magnetic fluxes of the armature windings of the stator from leaking toward interpole portions between the magnetic poles. The power output of the machine can be improved by increased effective fluxes.

Abstract: A flux commutating electrical machine includes a stator and a rotor. The rotor selectively establishes closed magnetic circuits around sections of the armature coils. Excitation permanent magnets establish a magnetic flux closing on itself in a circumferential direction and excitation coils establish a localized variable magnetic flux in an opposite direction to that of the flux produced by the magnets. Each magnet is housed in a first rotor part defining a first pair of rotor poles, and the coils are disposed around a second rotor part ends of which define a second pair of poles. The rotor has between the adjacent first and second rotor parts third rotor parts forming with the first and second parts a circumferential magnetic conduction path.

Abstract: A cage carrying two axially adjustable conductors is mounted on one shaft and a rotor is mounted on a second coaxial shaft to occupy a position between the conductors. Permanent magnets on the rotor have poles spaced by air gaps from the conductors. The air gaps are adjusted by sliding the conductors toward and away from one another along slide members on the cage by use of adjustment units engaging the conductor rotors. Alternatively, the conductors can be mounted on the rotor, and the magnets can be adjustably mounted on the cage.

Abstract: A method and apparatus for field weakening in PM machines uses field weakening coils (35, 44, 45, 71, 72) to produce flux in one or more stators (34, 49, 63, 64), including a flux which counters flux normally produced in air gaps between the stator(s) (34, 49, 63, 64) and the rotor (20, 21, 41, 61) which carries the PM poles. Several modes of operation are introduced depending on the magnitude and polarity of current in the field weakening coils (35, 44, 45, 71, 72). The invention is particularly useful for, but not limited to, the electric vehicle drives and PM generators.

Abstract: A flux commutating electrical machine includes a stator and a rotor, the stator including at least one armature coil housed in at least one pair of notches and the rotor selectively establishing closed magnetic circuits around sections of the armature coil(s). At least one excitation permanent magnet establishes a magnetic flux in a circumferential direction of the rotor and at least one excitation coil establishes a localized variable magnetic flux in the same circumferential direction as the flux produced by the magnet(s). The magnet or each magnet is housed in a first rotor part defining a first pair of rotor poles, the coil is or the coils are housed in a second rotor part defining a second pair of rotor poles and the rotor parts are separated from each other by essentially magnetically non-conductive areas.

Abstract: A synchronous machine, in particular a generator for a motor vehicle, has an excitation system with a plurality of electrically excited individual poles in a rotor, preferably in form of claw poles which are excited by at least one common excitation coil, wherein for compensation of a magnetic stray flux, permanent magnets are inserted in free spaces between the axially oriented claw poles on the pole plates mounted on the axial ends of the rotors, and the permanent magnets are supported by a holder against centrifugal forces, so that the insertion of the permanent magnets is simplified and facilitated by a simple and inexpensive holder which reduces parts and mounting expenses.

Abstract: A double-sided, non-iron core, brushless, axial magnetic field permanent-magnet type DC motor includes a shaft, two electromagnet units parallelly mounted on the shaft, and a permanent magnet unit mounted on the shaft between the electromagnet units and having its direction of magnetization disposed in parallel to the shaft. The permanent magnet unit is allowed to rotate relatively around the electromagnet units by being forced by magnetic repulsion force from both sides. Electromagnetic areas at the electromagnet units are arranged in a staggered manner, enabling permanent steel magnets at the permanent magnet unit to be alternatively fully induced from its two opposite sides to provide a high torsion output. The electromagnetic areas of the two electromagnet units are caused to change the phase alternatively at a 90.degree. phase difference, so that vibration and dead section problems are eliminated during the operation of the DC motor.

Abstract: A synchronous motor stator coil assembly has a bobbin with a pair of annular spaced flanges, with one flange having an open receptacle shell formed integrally on the outer face and extending axially outwardly. The receptacle has an electrical terminal pin centrally located in a cylindrical surface in the receptacle. The pin has a projection extending through a slot in the bobbin flange. A coil of continuous electrical conductor is wound on the bobbin with one end of the coil conductor attached to the pin projection. An electrical wiper contact is disposed in a slot in the cylindrical wall in spaced parallel relationship to the central terminal pin. A projection on the wiper extends through a slot in the bobbin flange and is connected to the opposite end of the coil conductor. The central pin and wiper contact permit a widely used low voltage coaxial type harness connector to be plugged into the receptacle for supplying low voltage power to the motor.

Abstract: An electric pancake motor providing multi-directional output for use in a multi-functional apparatus in an automotive setting. The electric motor may rotate an actuator shaft about its axis to provide rotary output, as well as linearly translate the actuator shaft along its axis to provide axial output. Belleville washers, springs or other elastic members may be use to prevent axial translation of the actuator shaft during normal operations. In another aspect of the present invention, the electric motor may be driven by a single power source and selectively actuates at least two mechanically coupled thereto.

Abstract: A magnetic attraction driving engine utilizing a permanent magnet is provided with a permanent magnet, an electromagnet formed by winding a coil on a magnetic core with one end thereof stuck to one magnetic pole end of the permanent magnet, an excitation controller for exciting the electromagnet to change a state of magnetic fluxes in the vicinity of the magnetic pole end of the permanent magnet, a movable member having magnetic attractivity set in the vicinity of the magnetic pole end of the permanent magnet by being supported and guided so as to be capable of coming close to or separating away from the permanent magnet and a returning force applying member for causing by pressure the movable member to retreat against a magnetic attracting force and move back and forth by changing a magnetic attracting force of the permanent magnet.

Abstract: Mechanical means are provided to control the voltages induced in the windings of a generator/motor. In one embodiment, a lever is used to withdraw or insert the entire stator windings from the cavity where the rotating field exists. In another embodiment, voltage control and/or switching off of the output is achievable with a variable-coupling generator/motor. A stator is made up of two concentric layers of windings, with a larger number of turns on the inner layer of windings than the outer layer of windings. The windings are to be connected in series electrically, that is, their voltages add vectorially. The mechanical arrangement is such that one or both of the windings can be rotated with respect to the other winding about their common central axis. Another improved design for the stator assembly of electromechanical batteries provides knife switch contacts that are in electrical contact with the stator windings.

Abstract: Proportional control of the output of an alternator achieved mechanically to change the reluctance of the magnetic path between the stator and the rotor and thereby change the electrical output of the alternator.

Abstract: A single phase alternating current four pole/six pole capacitor run induction motor is provided having a stator assembly including three coil groups, each of the coil groups having four coil sets. Each of the winding sets can change the direction of current flow in its half of the coil sets by reconnecting the coil sets either in parallel or in series. For high speed operation, the coil sets of group one are connected parallel with one another, and in series with the similarly parallel connected coil sets of group two. This arrangement defines a four pole main winding for the motor. A pair of the coil sets of group three are connected in parallel with one another, and defines the four pole auxiliary winding for the motor. In six pole operation, the coil sets of group one 1 are connected in series to parallelly connected coil sets of group three to define the six pole auxiliary winding.

Abstract: A brushless motor having permanent magnets that can be used as a prime mover for automobiles, in place of internal combustion engines, since the motor can yield high torque during low-speed rotation, as in the case of conventional types of brushless motors and can be used at high torque and with excellent motor efficiency at rotations three times as high as that of conventional types.

Abstract: A permanent magnet electric generator has a raised output as compared with the output of a similar conventional permanent magnet generator in which the polar arcuate angle of the permanent magnets is equal to the polar arcuate angle of controlling magnetic poles. Electricity is generated in armature coils 16 by the rotation of permanent magnets 8 of a rotor 4. Controlling magnetic poles 9 formed of a magnetic material are interposed between the permanent magnets 8 of the rotor 4, and a field controlling coil 17 is provided on a stator 11. The value of the polar arcuate angle .theta. m of the permanent magnets 8 divided by the sum of the polar arcuate angle .theta. m of the permanent magnets 8 plus the polar arcuate angle .theta. p of the controlling magnetic poles 9 is set at 0.55 to 0.7.

Abstract: A motor vehicle alternator connected to an output shaft of an internal combustion engine mounted on a vehicle, comprising a rotor made of a permanent magnet for producing a magnetic field, an armature (stator) having a coil placed opposite to the permanent magnet rotor and a belt drive mechanism for connecting one of the permanent magnet and the armature to the output shaft of the engine to bring them into a relative rotation such that the armature relatively moves in the magnetic field produced by the permanent magnet. In the alternator, there is provided an axial displacement mechanism for displacing at least one of the permanent magnet rotor and the armature in an axial direction of the relative rotation, whereby a magnetic flux passing through the armature is changed.

Abstract: A thermo-sensitive actuator capable of operating without the need of providing a temperature detector as a separate member. The actuator includes a stator made of a magnetic material to form a yoke. A rotor is rotatably provided in an opening provided in the stator. The actuator further includes pole pieces for magnetically connecting the stator and the rotor. A magnetic source is provided in any of the magnetic paths formed by the constituent elements. A thermo-sensitive magnetic material, which shows a change in magnetic characteristics, e.g. permeability, saturated magnetic flux density, or residual magnetic flux density, according to temperature, is provided in a part of the magnetic paths.

Abstract: A flywheel system having permanent magnets 20 disposed on a flywheel 10 rotating about a shaft 12 is provided with a stator 28 having an outer diameter which is oriented concentrically and shaped conically within a similarly shaped inner diameter of the flywheel 10 (and the magnets 20) and the stator 28 is slidably and rotatably mounted to a shaft 30 thereby allowing a gap g.sub.1 between the stator 28 and the rotor/flywheel 10 to be adjustable. When energy is being provided to (spin-up) or extracted from (spin-down) the flywheel 10, the stator is automatically forced to the left (FIG. 1) due to torque on the stator 28, thereby causing the gap g.sub.1 to be small to provide strong electromagnetic interaction between the stator 28 and the flywheel 10. Conversely, when the flywheel 10 is freewheeling, the stator 28 is forced to the right by a spring 40 causing the gap g.sub.1 to increase to a distance large enough to minimize electro-magnetic drag on the flywheel 10.

Abstract: A combined linear-rotary stepping motor shares stator iron plates and mover iron cores for a linear motor portion and a rotary motor portion without lengthening the length in the shaft direction.The combined linear-rotary stepping motor includes a stator 1 having a stator iron core 10 provided with a plurality of salient poles 11, 12, 13, . . . composed of the salient poles having a plurality of first stator teeth 24 formed in inner peripheral surfaces thereof in the direction of a shaft 21 and the salient poles having a plurality of second stator teeth 25 formed in inner peripheral surfaces thereof in the circumferential direction and a mover 2 having mover iron cores 22a and 22b supported within the stator 1 movably in the shaft direction and rotatably and provided with a plurality of mover teeth 26 formed in outer peripheral surfaces thereof at an equal pitch in the shaft direction and the circumferential direction in opposing relation to the first and second stator teeth 24, 25.

Abstract: A compact energy storage system includes a high speed rotating flywheel and an integral motor/generator unit. The rotating components are contained within a vacuum enclosure to minimize windage losses. The flywheel rotor has a unique axial profile to both maximize the energy density of the flywheel and to maximize the volumetric efficiency of the entire system. The rotor is configured with hollowed-out regions at each axial end to accommodate magnetic bearing assemblies. The integral motor/generator is disposed on a tail shaft of the flywheel rotor, outboard of the magnetic bearing assembly. The motor/generator stator is mounted on a translation carriage for axial movement. During normal operation, the stator is in operative alignment with a rotor on the flywheel shaft. However, when neither motor nor generator operation is required, the stator is extended to an axial position where it is effectively decoupled from the rotor.

Abstract: An electromagnetic actuator (1) comprises two actuator sections which are translatable relative to one another along an actuator axis (1a) and which are rotatable about the actuator axis, a first actuator section (1) comprising a coil system and a second actuator section (3) comprising a permanent magnet system for cooperation with the coil system via an air gap. The coil system is arranged on a magnetically conductive yoke (5) and comprises a cylindrical translation coil (9) and a toroidal rotation coil (7), which are coaxial with the actuator axis. The permanent magnet system comprises an annular magnet (11), which is coaxial with the actuator axis, for cooperation with both the translation coil and the rotation coil. The magnet has a radial magnetisation (B) which is interrupted by an annular segment (13). The magnetically conductive yoke has a central core (5b) around which the translation coil is arranged and a shell (5a) on which the rotation coil is disposed.

Abstract: A direct drive servovalve wherein a limited angle force motor is interconnected with a spool valve to convert rotary motion of the drive motor rotor to linear motion of the spool for the control of fluid from a source thereof to a load. The permanent magnets utilized in the rotor of the drive motor are positioned in such a manner that a resultant magnetic force is generated so as to urge the rotor against a bearing which supports the rotor shaft so as to substantially eliminate any radially play or sloppiness in the motor rotor.

Abstract: An electric generator which can be powered using a minimal amount of mechanical power, and in particular, an electric generator having a weak electromagnet which acts as a stator core, thus enabling electric power generation to occur while only minimal amounts of mechanical power are utilized. The generator comprises two annular ferromagnetic silicon steel plates inserted between non-magnetic plates to thus define a stator core with a stacked silicon steel plate and non-magnetic plate arrangement. The internal diameter of the ferromagnetic silicon steel plates is preferably at least 5 millimeters larger than that of the non-magnetic plates. Consequently, a strong magnetic field cannot be formed around the stator core, and as a result, the generator's rotor can be rotated using minimal amounts of mechanical power.

Abstract: A dual permanent magnet generator (10) is provided with a differential gear arrangement (20) comprising two ring gears (21, 26), two planetary gears (30, 31) and a carrier (32) which is splined to an input shaft (12) in the generator (10) so as to rotate the carrier (32) at the same speed as the input shaft (12) while allowing the input shaft (12) to shift axially. One of the ring gears (21) has a threaded connection (18, 38) with the input shaft (12). Consequently, as either the ring gear (21) or the ring gear (26) is slowed down through the application of a resistive load on small generators (22, 23 and 27, 28) associated with the respective ring gears (21, 26), the threaded connection (18, 38) will cause the input shaft (12) to move axially in one of two directions and, via lefthand and righthand spline connections (15, 16) between the input shaft (12) and main rotors (13, 13'), cam the rotors (13, 13') to shift into and out of phase with respect to each other.

Abstract: An electric machine includes an armature which has a permanent-magnetic excitation part of the machine and a stator which has an induction part of the machine. The induction part includes a first and a second region, each region equipped with current conductors. The armature and the stator are movable relative to each other. The machine includes an electronic commutator which has electronic components. An adjustment to purposefully change a voltage induced in the induction part during operation of the machine, by adjustment of the relative phase of the voltages induced in the two regions of the induction part is achievable due to the first region of the induction part being physically adjustable relative to the second region of the induction part in the direction of relative movement of the armature and the stator. In addition, a sensor is provided in the second region for detecting the instantaneous relative position of the armature and the stator.

Abstract: A device for connecting a shutter blade to a electromagnetic camera shuttering system that utilizes an armature for producing a first magnetic field, and a stop to control the movement of a shutter blade. The device comprises: a shutter blade that moves across the aperture of the camera and bounces off a stop to control the amount of light that is allowed to enter the camera; and a moveable magnet that produces a second magnetic field, the second magnetic field is coupled to the first magnetic field and a portion of the magnet is sized and shaped to fit the magnet to an orifice in the blade, so that when a portion of the magnet is placed in the orifice the blade will be directly connected to the magnet, and the presence or absence of the first magnetic field will cause the magnet and the blade to move to different orientations.

Abstract: An axially magnetized linear force motor employs an exteriorly faced armature (4) having a first exterior face (14) and a second exterior face (16), wherein said first face (14) is acted upon by a first axial magnetic field established by a first annular, axially polarized, permanent magnet (22) and said second face (16) is acted upon by a second axial, magnetically opposing, magnetic field established by a second annular, axially polarized, permanent magnet (26). Actuation of a coil (32) affects the first and second fields oppositely causing an imbalance of net magnetic forces. The force imbalance causes the armature (4) to displace to a point where the net magnetic force equals a counter force established by a spring (10). Positionable ferromagnetic slugs (36, 37) alter the ratio of displacement of the armature (4) to the magnitude of a signal used to actuate the coil (32).

Abstract: A diaphragm electromagnetic drive device which comprises ring-shaped rotor and stator disposed coaxially about the optical axis of a taking lens and in which the rotor is rotated to thereby rotate diaphragm blades so as to vary successively a diaphragm diameter defined by the diaphragm blades. The mutually opposed surfaces of the rotor and stator are constructed respectively in the shape of a side surface of a truncated cone, so that the areas of the opposed surfaces can be increased without increasing the outside diameter and the length in the optical axis direction of the electromagnetic drive device.

Abstract: A step motor which, in addition to an exciter system for step-by-step movement, is provided with a further exciter system. As a result of the direct or indirect influence of the magnetic field generated by the secondary exciter system on the rotor which is supported so as to be able to move in an axial direction with respect to the stator, the rotor can be induced to move in a direction perpendicular to its step-by-step rotary motion, as well. Both exciter systems can be energized independently of one another, so that step-by-step rotary movement can be performed at any axial position of the rotor, and the rotor can be made to move in an axial direction during its rotary movement, as well as when it is at rest.

Abstract: An electric motor having a design rotational direction when electrically energized and an anti-rotation mechanism to prevent reverse rotation due to external loads when the motor is de-energized which reverse direction could otherwise continue when the motor is energized. The mechanism includes elements that are displaced from contact with one another when upon energization the rotor assumes a magnetic center relative to the stator and that interengage to prevent reverse rotation upon motor de-energization and displacement of the rotor from the magnetic center position.

Abstract: A combined linear-rotary direct drive step motor, having a rotary section and a linear section in a single housing, comprising a cylindrically shaped variable reluctance linear step motor; a modified hybrid permanent-magnet rotary step motor; and a common shaft shared by said linear step motor and said rotary step motor. The teeth of the rotary motor are circumferentially spaced around the stator pole faces and rotor; while in the linear portion of the motor, the teeth are longitudinally spaced along the face of the stator poles and rotor. Except for the teeth, the shape of the stator poles in the rotary and linear sections are identical. The laminated stators and rotors reduce eddy current losses at high stepping speeds. The stator coils of both motor sections are separate and can be energized independently allowing any combination of rotary or linear motion. According to alternate embodiments of the invention, the rotor is fabricated from stacked laminations, in a waffle board like configuration.

Abstract: An automatic washer is provided with a separate motor to drive the drain pump, the motor having a displaceable stator portion connected to the basket brake mechanism such that when the pump motor is energized the basket brake will be released. Such a construction obviates the need for a separate component such as a solenoid to deactivate the brake mechanism. The stator portion is displaceable perpendicularly to the rotor axis and can move either in a radial sliding manner or can be pivotally mounted so as to move through an arc relative to the rotor.

Abstract: A motor-driven fuel pump including a brushless motor; a motor housing for enclosing the brushless motor; and a pump section adapted to be driven by the brushless motor for sucking a fuel and pumping the same into the motor housing.

Abstract: A magnetic actuator for controlling the electrical induction in a pickup coil to a predetermined speed of rotation of a workpiece actuated shaft consisting of a series of magnets in a fixed circular relationship to a rotating shaft and a complimentary series of magnets positioned on the first series and magnetically retained thereon, a series pickup coil also circularly posiitoned relative to the rotating shaft but of a greater diameter than the ring formed by the magnets, and upon the rotation of the shaft workpiece, the magnets with continue to the attracted; as the rotation increases the centrifugal force of rotation increases and as the speed of rotation attains a given speed, the centrifugal force exceeds the magnetic attraction between the two series of magnets; at this speed the second series of magnets will move outwardly from the rotating shaft; the mgneticfield of the moved magnets become vertically aligned with the series pickup coil and wherein the magnetic-field induces an electrical potential in

Abstract: The stator of this flat magnetized-rotor motor comprises sets of pole pieces, arranged substantially radially, the sets being surrounded by corresponding electrical control coils. Separate yoke portions, having surface portions of axially symmetric design, are arranged in contact with the pole pieces of a corresponding set. The flat portions each consist of two sheet elements, forming between them an angle; the portions are inserted radially in the respective slots of a support portion of a stator element. With this arrangement it is possible to produce high-performance motors, at very low cost and whose dimensions in the radial direction are extremely small.