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 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 drive has a hub with first and second end portions and a shoulder located thereon. An armature and sheave assembly is located on bearings on the hub first end portion. The armature forms a cavity for receiving an electromagnet, which abuts against the shoulder. Slip rings are coupled to the electromagnet by way of a fan and a slip ring shaft. The slip rings, which are adjacent to the second end of the hub, can be of a small diameter to extend brush life. In addition, the same size slip rings can be used on different sizes of the drive. Two piece brush holders are provided for each brush. Each brush holder can be disassembled into its respective pieces for cleaning. The brush holders and slip rings can be protected from the environment by a cover. In another embodiment, a brushless drive has a coil mounted to bearings by way of a coil mount. The bearings are located on a hub. The coil mount is anchored to a fixed object.

Abstract: The invention concerns a bistable magnetic drive with an assembled armature 3, 4 consisting of a high-grade, disk-shaped permanent magnet 3 with two appropriately shaped pole pieces 4,4' and displaceable sideways off the coil 1 transversely to its axis inside an electromagnetic annular pole-piece Rp between two electromagnetic stop pole-pieces 5, 5'. The invention describes illustrative embodiments and applications of this drive as an excursion and oscillating magnet, further a circuit for DC operation. A capacitor circuit furthermore allows mono-stable operation. The advantages are a lightweight armature, high efficiency, bilateral operation, versatility and simplicity.

Abstract: The present invention relates to a rotary machine. Main technical problem is in that two rotating forces being different in the rotating direction are taken to the outside using one motor. Consequently, in the invention, a stator (3) is rotatably supported by a support body (2) and provided with an output shaft or an input shaft (34), and further static side and rotating side are electrically connected. The rotary machine according to the invention can be applied as the drive source of a load requiring the rotating force in different rotating direction, or can be applied as a generator by the power source of wide range and other wide use ranges.

Abstract: A force actuator arrangement comprises a force generating member performing an oscillating movement, preferably a rod (7) of magnetostrictive material, force transmitting means-in a disc brake arrangement a caliper (4,5)-, and a device (8,9) for transforming the oscillating movement to a unidirectional application movement of the force transmitting means. The oscillation frequency of the force generating member is higher than the natural frequency of the force transmitting means for enabling the movement transforming device to transmit the movement only during each oscillation stroke in the application direction.

Abstract: A starter motor with an intermediate gear wheel. The starter motor includes an interposition member interposed between the front end of a clutch cover fitted onto an overrunning clutch and the rear end of an intermediate gear wheel, a movable connecting member including a boss portion which is loosely fitted onto the outer circumference of an extended boss portion projecting backwardly from the rear end portion of the intermediate gear wheel, and a circular-arc-shaped fitting portion which is formed integrally with the rear end portion of the boss portion to extend upwardly and which is fitted to a lower half portion of a fitting groove formed at the rear end portion of the overrunning clutch so as to be movable in the axial direction of the clutch.

Abstract: For damping torsion vibrations in the drive line of a motor vehicle which contains a torsion vibration damper (5) between its internal combustion engine (1) and its gearbox (11), there is coupled to the output of the torsion vibration damper (5) an electric motor driven torque buffer (23) which compensates for any fluctuations in torque still present at the output of the torsion vibration damper (5) and occasioned by the firing sequence of the internal combustion engine (1). The torque buffer (23) is constructed after the fashion of a polyphase synchronous motor, the number of pairs of poles and possibly the rotary speed at which the magnetic fields rotates being so chosen that the angular cycle of the torque fluctuation exerted by the magnetic field on the rotor (31) of the torque buffer is equal to the angular cycle of the torque fluctuation originating from the firing sequence of the internal combustion engine (1). A control circuit (37) regulates the phasing of the magnetic field and its intensity.

Abstract: A unique electromagnetic brake which, when pulsed with a D.C. current, will latch and hold in either of two extreme positions; on position and off position. A continuous current is not necessary to maintain either position which eliminates power loss from a limited power supply and heat dissipation problems.

Abstract: The synchronous motor includes at its rotor a thin-walled cylindrical cup member. This cup member includes at its outer side a plurality of rings which are electrically insulated against each other. A plurality of rod shpaed permanent magnets are in turn arranged at the surface of the rings and extend parallel to the rotor axis. Preferably a braking unit is located at the inside between the inner side of the cup and the rotor shaft which unit act as a standstill brake.

Abstract: A low loss synchronous magnetic drive system for high pressure, high horsepower applications is disclosed. A carrier member driven by a drive motor carries spaced apart sets of drive magnets with the magnets of one set being of opposite polarity to the longitudinally aligned magnets of the other set. An output shaft carrying driven magnets oriented similarly to the drive magnets is also provided. A metallic hyperbaric barrier separates the drive and driven magnets. The barrier includes an outer cylinder having circumferentially spaced, radially directed, narrow slots extending therealong. Within the cylinder is a plurality of axially adjacent annular laminations insulated from each other. During operation the combination of the slotted cylinder, the laminations and the magnet arrangement keeps eddy currents generated in the barrier at a minimum, ensuring a high efficiency drive operable at speeds and pressures heretofore unattainable.

Abstract: An electromagnetic clutch includes a clutch rotor and an annular electromagnet. The clutch rotor has a rotor which sectional side view is a U-shaped configuration and a pulley mounted at an outer peripheral surface of the rotor. The annular electromagnet is disposed in an annular cavity of the rotor. An armature plate facing to a front end surface of the rotor is supported elastically by a stopper plate through a plurality of leaf springs. The stopper plate is fixed to an outer end of a drive shaft. First engaging elements are formed at an outer peripheral surface of the rotor. Second engaging elements are formed at an inner peripheral surface of the pulley. The first and second engaging elements are complementary and prevent the relative rotational motion of the pulley and the rotor when engaged. A stopper provided on the outer peripheral surface of the rotor prevents the relative axial movement of the pulley and the rotor.

Abstract: A coaxial type starter used to start an engine of a vehicle is disclosed. The starter includes a d.c. motor having an armature rotary shaft which incorporates an overrunning clutch and six or more magnetic poles which are defined by permanent magnets disposed circumferentially on the inner surface of a tubular yoke for forming a magnetic path. Provision of six or more magnetic poles on the inner surface of the yoke enables a reduction in the thickness of the yoke and the diametrical thickness of the armature core since the required thicknesses of the yoke and the armature core are inversely proportional to the number of field magnetic poles. Accordingly, it is possible to incorporate the overrunning clutch inside the armature rotary shaft without any increase in the overall diameter of the starter. Thus, it is possible to achieve a reduction in the overall size of the starter.

Abstract: A disk brake motor comprises an electric motor having a housing, an electromagnet, at least one friction surface and a brake wheel which is in contact with the friction surface during braking, the brake wheel including an impeller for drawing in and impelling air so that the air flows tangentially of a surface of the electromagnet into the brake wheel and past the friction surface onto a surface of the housing of the electric motor.

Abstract: An electromagnetic clutch of the type which includes a rotor secured around a rotation shaft, a drive member rotatably mounted around the rotation shaft, an armature mounted through a resilient member to the drive member with a gap to the rotor, a bearing mounted around the rotation shaft, a yoke mounted around the bearing for rotation about the rotation shaft, and the yoke locking mechanism for locking the yoke to a frame so as to prevent the yoke from accompanying the rotation shaft when the rotation shaft is rotated, the yoke having a coil wound therearound, and in which the rotor, the armature and the yoke are arranged to form a magnetic path so that the armature is electromagnetically attracted to the rotor for transmitting torque from the drive member to the rotation shaft when the coil is energized.

Abstract: An eddy current coupling for a dynamo-electric machine. A flux path between a rotating drive shaft and a rotatable driven shaft includes an inductor drum connected to the drive shaft and a pole assembly coupled to the driven shaft. A coil assembly partially surrounded by the pole assembly controls the degree of electromagnetic coupling. A series of interdigitated pole fingers are spaced between the inductor drum and the field coil assembly to facilitate air flow that dissipates heat caused by relative rotation between the inductor drum and the pole assembly. The coil assembly includes an annular coil support co-axial with the driven shaft to support an annular field coil in a gap defined by the pole assembly.

Abstract: A friction braking system located entirely inside an induction motor of an appliance quickly stops rotation of the rotor in the appliance motor, for example such as a food processor, whenever the A.C. electrical power is turned off. Thus, rotation of any tool being operated in the appliance is quickly stopped, whenever the electrical power is interrupted. The rotor in the induction motor is axially slidably mounted on the motor shaft and is keyed to the shaft for permitting axial shifting displacement of the rotor relative to the stator while preventing any angular displacement of the rotor relative to the shaft. Consequently, the rotor and shaft always turn and stop as a function unit. A friction brake lining is affixed within the motor housing offset from the axis of the motor shaft as far as practicable. A disc brake mounted onto the rotor has an annular friction braking surface positioned for engagement against the brake lining.

Abstract: An electromagnetic clutch is disclosed comprising a rotor and an armature plate with improved frictional surfaces. The armature plate is disposed to face the rotor with a predetermined axial gap. The rotor or the armature plate is provided with a contact surface which contains spiral concaves and projections with a predetermined pitch. This surface has a layer of metal plating with a hardness lower than that of the magnetic materials which make up the rotor and armature plate.

Abstract: A drive unit for adjusting window panes, sunroofs, and seats in a vehicle has a reversible electric motor behind which is inserted a worm gear with a worm shaft. To prevent an undesired or unauthorized adjustment of a motor vehicle part, a brake device is provided. The brake device has a mechanical, one-way brake element with which the worm shaft may be coupled by an axial displacement. In order to reduce the effect of the brake device on the worm shaft when the window pane is adjusted by the electric motor, the brake element is the rotatable part of a rotation limiting device and, in the axial direction, it is supported on a stop.

Abstract: A starting system for an internal combustion engine, comprising a stator; a cylindrical rotor which is arranged on an inner peripheral side of the stator with a predetermined gap therefrom; an overrunning clutch which includes a first cylindrical clutch body that is mounted on an inner peripheral surface of the rotor, and a second cylindrical clutch body that is clutch-coupled with the first clutch body; a rotary shaft which is penetratingly arranged on an inner peripheral portion of the second clutch body of the overrunning clutch, which is axially movable relative to the second clutch body and which rotates along with the second clutch body; a pinion which is disposed at one end of the rotary shaft and which is brought into meshing engagement with a ring gear of the engine being a first load device; a power transmission mechanism which is disposed at the other end of the rotary shaft and which transmits power to a second load device; and a shift lever which slides the rotary shaft in the axial direction the

Abstract: A hysteresis tensioning device 10 incorporates an improved apparatus for setting and maintaining an air gap 48 between a hysteresis ring 32 and a magnet 36. The hysteresis ring operates in a fully saturated magnetic force field, and is thus amenable for tension control in environments subject to wide temperature variations. To the extent that magnetic tape recording is involved, the apparatus incorporates the use of magnets which are structured for being fixed relative to magnetic tape heads associated therewith, whereby any associated flux leaks are of the direct current type only. In a preferred embodiment, the device includes a pulley assembly 12 rotatably mounted on a bearing 20 having an inner race 22 supported on an axially disposed pulley shaft 16. The assembly includes a hysteresis ring 32 bonded to one side of a pulley sheave 18, the ring being axially spaced with respect to a magnet 36, whereby an air gap 48 is defined therebetween.

Abstract: A device with an electromagnetic clutch includes a tubular member of steel which is secured to, and cantilevered by, a flange member secured to a housing of the device. A pulley having magnetic pole faces is rotatably mounted on the tubular member by one or more bearings. A drive shaft of the device extends out of the housing and through the tubular member, and supports a magnetic armature on the extended end. An electromagnet associating with the pulley is fixedly supported on the flange member to supply magnetic attraction force for attracting the armature plate to the pulley. In the arrangement, since the wall thickness of the tubular member is made thin, the outer diameter of the clutch can be reduced without degrading the transmission of rotational force. And a shaft seal assembly can be mounted on the drive shaft within the tubular member. Furthermore, the inner ring of the bearing is held between the flange member and a retaining ring fitted onto the tubular member, to be prevented from axial movement.

Abstract: An electric motor for a magnetic tape recorder comprises an electrically insulating disk-shaped stator with a plurality of flatwise coils, a rotary shaft rotatably extending through the stator, and a first disk-shaped rotor of soft iron with a multi-pole annular magnet and a second disk-shaped rotor of soft iron rotatably extending through the shaft on both sides of the stator. A pulley is fixed on the shaft below the first rotor to drive capstans, and a reel disc or a pinion is coaxially connected to the second rotor to drive a take-up reel for forward play. In a fast forward feed mode, the first and second rotors can be mechanically interlinked. Alternatively, an electromagnetic solenoid may be used to take out a torque from the first rotor by engaging an idle roller with a roller fixed to the rotary a shaft above the pinion or to apply a pressure to the second rotor to increase the friction between the second rotor and an adjacent shoulder on the shaft.

Abstract: Fail safe electromagnetic clutch (10) includes a driving member (12) and a driven member (16). Engagement structure (30) cushions engagement between the driving member (12) and driven member (16) when the clutch is engaged. The engagement structure (30) includes a pair of elements (36, 34) and a resilient wave washer (42) located therebetween. The waver washer (42) biases the element (36) into driving engagement with the driving member (12) and biases the element (34) into driving engagement with the driven member (16). When the clutch is disengaged, a magnetic coil (22) forces the element (34) away from the driven member (16), thereby collapsing the wave washer (42). When the clutch is to be re-engaged, the coil (22) is de-energized, thereby permitting the wave washer (42) to drive the element (34) back into driving engagement with the driven member (16).

Abstract: A magnetic drive assembly includes a housing having a pair of end flanges, an annular drive member containing a plurality of drive members and internally thereof a driven member containing a plurality of driven magnets. The drive and driven members are bearingly supported by the end flanges so that rotation of the drive member results, through magnetic interaction, on rotation of the driven member. A barrier separates the driven and drive members and extends between the end flanges to hermetically seal the driven member. The barrier is formed from a plurality of abutting axially adjacent annular laminations held in axial compression by the end flanges, the laminations being formed of a non-magnetic material. In one embodiment the laminations have a chevron shape in radial cross-section whereby adjacent laminations are nestable with each other.

Abstract: An electric motor with automatically acting brake, which possesses a brake element including an armature plate and displaceable on the rotor shaft against a helical spring, and released by the magnetic field of the rotor. The brake element axially guides a disc possessing guide grooves situated between it and the armature plate. The inclined planes of the disc are facing towards the rotor and extending around the rotor shaft in the form of annular segments are disposed axially symmetrically on this disc, which are pressed by a prestressed spring bearing against the brake element onto a starting pin inserted into the rotor shaft.

Abstract: A reel mechanism for use in a playing device comprises a DC motor having a rotor formed with an outer apron on which are displayed a plurality of substantially equally spaced symbols which are to be sequentially displayed in a visual field. The rotor rotates about the stator with the rotor having permanent magnetic poles which interact with the stator. The apron has a plurality of perforations or recesses associated with the individual symbols which are scanned by a plurality of photo-transistor scanning devices so as to generate for each symbol upon its passing of a particular position unique information scanning signals which identify each of the symbols.

Abstract: A magnetic clutch or drag brake for a rotary shaft which is particularly adapted for use as a web or sheet tensioning control is disclosed. The device includes a first clutch element providing a selectively variable torque which is independent of shaft rotation or slip speed and a second clutch having an independently selectively variable torque which is dependent upon slip speed. The two clutch elements are associated in one housing between input and output shafts such that their clutching or braking action is cumulatively applied to the output shaft to provide an infinitely variable output from zero to maximum shaft speeds. The first clutch element utilizes the principal or magnetic hysteresis of a driven disc of high hysteresis-loss material while the second clutch element utilizes the principle of magnetic eddy current variations caused by an adjustable flux gate which varies the magnetic coupling between a driven and fixed member.

Abstract: A magnetic particle apparatus having spaced relatively movable members with magnetic particles positioned therebetween and electromagnetic field producing mechanism to generate a magnetic field between the relatively movable members through the magnetic particles to establish coupling therebetween, the improvements to such apparatus being embodied in an improved cast iron construction for many parts of the subject apparatus, a more efficient safer apparatus, improved apparatus for circulating cooling air through and closely adjacent to the heat producing components to dissipate heat generated while providing support for the drive cylinder and maintaining the magnetic particles in their most advantageous positions, an improved magnetic gap construction which minimizes flux leakage and increases operating efficiency, including a saturable bridge which enables use of a bobbin of one-piece construction without shunting out flux, and the present construction includes structural members arranged to form a circuitou

Abstract: A fluid coupling, of the kind in which the filling of its working circuit is determined by a movable trimming scoop, is driven by an electric motor. The coupling output drives a high-inertia load such as a long, loaded conveyor belt. During start-up, filling control means for the coupling increases the coupling filling except when the transmitted torque, determined by sensing the motor current, exceeds a predetermined value. The movable scoop is then held stationary to hold the degree of filling of the coupling constant until the torque again drops below the predetermined value.

Abstract: An ultrasonic transducer specifically suited to high temperature sodium applications is described. A piezoelectric active element is joined to the transducer faceplate by coating the faceplate and juxtaposed active element face with wetting agents specifically compatible with the bonding procedure employed to achieve the joint. The opposite face of the active element is fitted with a backing member designed to assure continued electrical continuity during adverse operating conditions which can result in the fracturing of the active element. The fit is achieved employing a spring-loaded electrode operably arranged to electrically couple the internal transducer components, enclosed in a hermetically sealed housing, to accessory components normally employed in transducer applications.Two alternative backing members are taught for assuring electrical continuity. The first employs a resilient, discrete multipoint contact electrode in electrical communication with the active element face.