Abstract: A plurality of eccentric rotors are rotatably fitted between a fixed base and an output shaft on which an object to be vibrationproofed is mounted, the output shaft being supported movably in 3 to 6 Degree-of-Freedom, magnet spring mechanisms are provided on fitted wall surfaces between the fixed base and the eccentric rotor, a composite vibrationproof adjusting spring is provided between the fixed base and the output shaft, the magnet spring mechanism responding to a fine displacement of the output shaft, and in a case where the output shaft is greatly displaced, the output shaft is braked so as to be restored to a predetermined position by the composite vibrationproof adjusting spring mechanism. The magnet spring mechanism produces a large braking force since a rotational angle is large and a rotational-angle speed is high due to eccentricity of eccentric rotors.

Abstract: The present invention provides an improved electric drum brake (10). The electric drum brake (10) utilizes vibration absorbing mount (27) for positioning an electro-magnet (24) on the tang (22) of an actuating lever (21). The vibration absorbing mount (27) prevents metal-to-metal contact between the tang (22) and the electromagnet (24) and eliminates or greatly reduces road vibrations.

Abstract: An electromagnetic brake is disclosed which comprises a brake wheel, a friction surface touching the brake wheel during braking and attached to an anchor plate moved by brake springs and an electromagnet which disengages the friction surface from contact with the brake wheel when a current is supplied to the magnet. To compensate for the wear of the friction surface, the brake has at least one retainer mounted on a bolt or shaft lying parallel to the axial direction of the brake. The retainer moves with the anchor plate towards the brake wheel and is provided with a directional element which limits the motion of the anchor plate away from the brake wheel. The brake is also provided with a wedge ring rotated by a spring which serves to move the electromagnet towards the brake wheel.

Abstract: An electrical actuation system for a drive utilizing one or more disc stacks having annular discs alternately connected with two or more drive components. A disc stack is directly selectively clamped by an armature of an armature assembly being magnetically attracted to an electromagnetic coil of an electromagnetic coil assembly upon energization of an excitation current in the electromagnetic coil. The armature has a zero air gap with respect to the electromagnetic coil when the disc stack is clamped. A plurality of armature springs are carried with the armature assembly and are compressed when the armature assembly biases against the disc stack, thereby accommodating wear of the discs. Clamping of the disc stack results in the two drive components connected therewith being interconnected. Upon the excitation current being switched off, the disc stack is no longer clamped and the two drive components are now unconnected.

Abstract: A relatively simple electromechanical cruise control for a vehicle includes a hydrostatic drive linkage having a flat portion connecting two links and extending adjacent an electromagnet fixed to the frame of the vehicle. Actuation of the control under preselected operating conditions activates the electromagnet to hold the flat portion stationary and thereby maintain a given hydrostatic control position. Interlock circuitry deactivates the magnet if the operator touches the brake, leaves his seat or turns off either the cruise switch or ignition switch.

Abstract: An electromagnetic disc brake for an elevator lifting apparatus comprises a disc spline-coupled with a rotational shaft. Braking body and an armature disposed to clamp the disc; braking springs press the armature against the disc, and an iron core is provided which includes inner and outer magnetic poles each facing the armature and concentrically formed with respect to the rotational shaft. An electromagnetic coil generates magnetic flux to pass through the inner and outer magnetic poles as magnetic paths. In addition, at least one of the pole face of the outer magnetic pole and the facing portion of the armature where it faces the pole face is provided with an arrangement for increasing a magnetic gap, and the braking springs are disposed in portions of the outer magnetic pole. Further, the braking body is supported through a sound absorbing member or one side of the armature facing the disc is formed of a sound absorbing member.

Abstract: An eddy current type retarder for a vehicle comprises a hollow rotor mounted on an engine-rotated shaft, a first stator mounted on a frame of the vehicle such that it faces an inner wall of the rotor, a first group of permanent magnets mounted on the first stator at intervals in the circumferential direction of the first stator with poles of the magnets being reversed alternately in the circumferential direction of the first stator, a second stator adapted to be movable relative to the first stator and provided near the first stator such that the second stator faces the inner wall of the rotor, a second group of permanent magnets mounted on the second stator at the same intervals as the first group of permanent magnets in the circumferential direction of the second stator with poles of the magnets being reversed alternately like the first group of magnets, a magnetic-passage-forming-ring provided between the rotor and the first and second stators, the ring having ferromagnetic elements which extend over the f

Abstract: A vehicle braking system including a brake structure defining an annular surface; an annular magnet support disposed adjacent to the annular surface; a plurality of circumferentially spaced apart pairs of circumferentially spaced apart permanent magnets mounted on the magnet support and circumferentially spaced apart thereon, each pair arranged with like polarities facing the annular surface and the polarities of the pairs of permanent magnets facing the annular surface alternating circumferentially; an annular pole piece support assembly; and a plurality of ferromagnetic pole pieces mounted on the pole piece support assembly and circumferentially spaced apart in positions between the annular surface and the permanent magnets, each pole piece disposed adjacent to a pair of the permanent magnets and having a circumferential length substantially greater than the circumferential length of either of the adjacent pair of permanent magnets.

Abstract: A magnetic brake provides braking or locking capability and is remotely controlled by electric power. The magnetic brake comprises a rotatable shaft and a brake disc mounted on the shaft. A non-rotating core housing assembly located around the shaft includes a permanent magnet and a bipolar solenoid. A magnetic armature adjacent to the core housing assembly is capable of movement toward the core housing assembly and toward and into engagement with a brake disc to prevent rotation of the shaft. A spring urges the armature away from the core housing assembly and into engagement with the brake disc. The brake does not use any electric power to maintain the brake in the set mode with the rotating shaft fully locked, or in the released mode with the rotating shaft fully released. The permanent magnet is of sufficient strength to hold the armature against urging of the spring until an opposite polarity is supplied by the solenoid.

Abstract: A displacement armature motor is formed such that the deformation element allows a larger axial shifting and displacement path of the displacement armature while requiring a lower construction precision. The deformation element includes two frames (17, 17a). The frame (17a) is connected via two of its corner attachment positions (17b) to an attachment plate (19). The attachment plate (19) is connected to an extension (31) of the displacement armature. The frame (17) is connected with two of its attachment positions to the carrier arms (15a) of the support ring (15). The two frames (17, 17a) are connected to each other with their respective remaining corner attachment positions (17c) via a transfer element (18).

Abstract: A torque and air gap adjustment mechanism is provided for a spring engaged electromagnetic brake or clutch, and consists of a plurality of hubs threaded to one another and to the brake casing for axial movement with respect thereto and with respect to each other. A plurality of detents are disposed within the hub positioned in cylindrical holes with springs forcing them away from each other and out of the holes. These detents are retained in the holes at one end by a hub provided for the torque adjustment and at the other end by the brake plate. In both the hub and the brake plate there are indentations to retain the detents. These indentations have differing angles as do the engaging surfaces of the detents to permit torque adjustment independent of air gap adjustment upon rotation of the torque adjusting hub.

Abstract: An electro-mechanical brake unit includes a drive sleeve (8), which may be subjected to a torque, for example from a coil spring (6), and a ball screw (15, 25) for transforming the torque into an axial force for brake application. Between the drive sleeve and the ball screw there is a control arrangement, comprising an outer locking spring (16), a control sleeve (17), and an inner locking spring (18), a control motor (20) being connected to the control sleeve for rotation thereof in either direction. The control sleeve is connected to the locking springs for control of their locking and unlocking functions.

Abstract: An eddy-current brake comprising a rotor or rotors made of a ferromagnetic material and electromagnets, in which the rotor is so disposed that it crosses the magnetic flux and a braking force is produced by the eddy current generated in the rotor. The rotor is provided with a metallic layer formed from a non-magnetic material having a greater electroconductivity than the rotor, and the coil of each electromagnet is enclosed by a magnetic pole case made of a ferromagnetic material, so that the device is capable of developing a large braking torque and suited for use as an auxiliary brake for vehicles.

Abstract: A fluid apparatus includes a pneumatic cylinder having a main body, a piston, and a hollow rod. A ball screw shaft engaged with a ball nut fixed to the piston is rotatably and axially unmovably mounted in the cylinder and extends in the hollow rod. A magnetic brake for braking the ball screw shaft is fixed to an end portion of the main body of the cylinder. The number of revolutions of the ball screw shaft is detected and outputted in a signal form by a rotary encoder. A primary solenoid controlled valve reciprocates the piston by connecting a pressure source either to a first or second port of the cyliner, and secondary solenoid controlled valves connect a pressure source either to a first braking pressure port or to a second braking pressure port.

Abstract: An assembly is provided formed by an electromagnetic vehicle retarder and its electric supply means, where the retarder has a rotor (2) mounted on the output shaft of the gearbox of the vehicle and a stator (13) cantilevered on the casing of this gearbox. The armature (5) of the retarder forms part of the stator and is cooled by water and its inductor (4), which forms part of the rotor, is fed electrically by an alternator whose rotor (13) and stator (14) are secured respectively to the rotor (2) and the stator (3) of the retarder.

Abstract: The shoe has a flat surface which can slide with reduced friction on a guide surface, means for introduction and distribution of compressed air to generate a supporting air cushion between the said surfaces, and a plurality of permanent magnets generating a force of attraction between the shoe and the guide surface in such a way as to cause the shoe itself to stop immediately when the supply of compressed air is interrupted.

Abstract: The electrically operated disc brakes (10, 210) may include a high efficiency screw and nut mechanism (60) and/or a one-way clutch mechanism (230). The high efficiency screw and nut mechanism (60) includes a screw (86) with a screw thread (89) that has a predetermined pitch, and at least one nut (77, 97) disposed about the screw (86) and having an interior opening (78, 98) with a nut thread (79, 99) therein. The pitch of the nut thread (79, 99) is equal to the pitch of the screw thread (89), and the pitch diameter of the nut thread (79, 99) is greater than the pitch diameter of the screw thread (89). The screw (86) is driven by the electric motor (40) of the disc brake (10, 210). The one-way clutch mechanism (230) includes a sun gear drive member (252) which has oppositely disposed radial drive slots (257) through which extends a drive pin (243) that extends transversely through the drive shaft (241) of the electric motor (240).

Abstract: This invention is a device for automatically adjusting the gap between a brake lining and a brake disk or drum. The gap can therefore be within the specified range for optimum braking performance, even when the brake linings become worn through extensive use.

Abstract: An industrial robot brake apparatus for braking a mechanism that drives a support shaft supporting an arm in a freely extendable manner is capable of forming a clearance between a fixed brake member, which is for stopping rotation of a screw rod that extends and retracts the support shaft, thereby positioning the working plane of the arm, and a movable brake, thereby facilitating replacement of a belt and inspection of the brake mechanism, such as a brake shoe.

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 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: An electromagnetic brake having brake shoes which are mounted immobile in circumferential direction with respect to a shaft, but are movable in radial direction. The brake shoes interact with a concentric ring-shaped brake stator having a toroid coil and a magnetizable ring housing that force the brake shoes in a radial direction opposite that of a radial force produced by a spring connected to the brake shoes, centrifical force, or a permanent magnet.

Abstract: A motor-driven power steering system for front and rear road wheels which is capable of preventing uncontrolled steering resulting from abnormal movement of the rear road wheels in case of a failure in various sensors and/or an electric motor or breakage in the wiring, and enabling vehicle to continuously travel in a safe manner by means of front wheel steering alone after occurrence of such troubles.

Abstract: An armature assembly in an electromagnetically actuated braking mechanism and including a circular armature plate having a central opening defined by a circumaxial series of radially inwardly extending armature teeth. The inner ends of the armature teeth cooperate to define a coaxial crest circle. A plastic hub, molded in place on the armature plate, substantially encapsulates the armature teeth and has a coaxial central opening defined by a circumaxial series of spline teeth which define a root circle having a diameter greater than the diameter of the crest circle. Equiangularly spaced fan blades integrally connected to the central portion of the hub project radially outwardly therefrom adjacent one face of the armature plate.

Abstract: A seat belt retractor comprises a spool which is rotatable in seat belt winding and unwinding directions. An inertia member is rotatable with the spool at spool accelerations below a predetermined level and rotatable relative to the spool at spool accelerations above the predetermined level. The spool is blocked against from rotation in the unwinding direction in response to relative rotation of the inertia member and the spool. The inertia member is restrained from rotation to effect rotation relative to the spool by an electromagnet having opposite poles extending adjacent the inertia member. The electromagnet is energized to create a magnetic field extending through the poles to cause the poles to be attracted against the inertia member to restrain rotation of the inertia member.

Abstract: The magnet body (11, 12, 13, 17) is composed of the winding (13) with U-shaped arrangement of separate parts, wherein specially the side leg portions (11, 12) are radially held together by a plastic shell (14) that also insulates the winding (13) and which grips into the spaces of the arrangement of side leg portions (11, 12) with projections (15), which are axially penetrated by spacer sleeves (8) or bolts (9) and eventually also individual pressure springs (18). The expenses of molding and fine processing for the conventional magnet are spared or greatly reduced and the assembly is also simplified in different respects.

Abstract: A method of forming non-magnetic barriers in the coupling disc (e.g., the armature or rotor) of an electromagnetic coupling such as a clutch or brake. The method is carried out by moving the disc relative to a laser beam which cuts a slot through the disc. In one embodiment, the slot is filled throughout its entire length by non-magnetic material, the filling being effected by continuously advancing a non-magnetic wire toward the laser beam to cause the wire to be melted by the beam and to flow into the newly formed slot. In another embodiment, the wire is advanced intermittently to form short non-magnetic bridges beween relatively long slots.

Abstract: An angular non return device is provided associated with a turnstile (1) having an axis X and capable of acting at will in one or the other direction. This device comprises a drum of revolution (2) integral with the turnstile and coaxial therewith, a fixed vee (3) whose bisecting plane contains the axis X, a roller (4) interposed between the vee and the drum and mounted on a lever (5) so that it may be moved between a first end position in which it is locked by jamming between the drum and a face (3.sub.1) of the vee and a second end position in which it is locked by jamming between the drum and the other face (3.sub.2) of the vee, and electromagnetic elements (6 to 10) for urging the roller at will towards one or other of its two end positions. Portions (14, 15) of the drum are recessed so as to prevent locking of the turnstile in certain angular positions.

Abstract: An electromechanical friction clutch and brake unit is disclosed for actuating and stopping a rotating element for example, an actuating shaft of the needle of a sewing machine. The clutch and brake unit has inside it a plurality of friction elements which are mutually engageable in substantial contact, with the interposition of oil of suitable viscosity, and the friction elements are made at least partly of on oil-impregnated, sintered, metallic material, so as to form reservoirs capable of supplying the oil by means of capillarity.

Abstract: Apparatus for electrically controlling the application and release of aircraft brakes. In one embodiment, the invention includes a slurry clutch controlling a reciprocating member which is operatively connected to the pressure plate. In another embodiment of the invention, a torque motor is adapted to have an armature which comprises a ball screw, the ball screw being in engagement with a longitudinal drive rod interconnected with the pressure plate. Rotation of the armature causes the drive rod to move the pressure plate into forceful engagement with the brake disk stack or to retract the same. In yet another embodiment of the invention, a plurality of torque motors are interconnected with a bull gear which is operative for driving the pressure plate.

Abstract: Apparatus for electrically controlling the application and release of aircraft brakes. In one embodiment, the invention includes a slurry clutch controlling a reciprocating member which is operatively connected to the pressure plate. In another embodiment of the invention, a torque motor is adapted to have an armature which comprises a ball screw, the ball screw being in engagement with a longitudinal drive ring communicating with the pressure plate. Rotation of the armature causes the drive ring to move the pressure plate into forceful engagement with the brake disk stack or to retract the same. In yet another embodiment of the invention, a plurality of torque motors are interconnected with a bull gear which is operative for driving the pressure plate.

Abstract: A motor positioner unit for sewing machines including an electromagnetically operated brake-clutch unit comprises a fixed structure of non-ferromagnetic material and clutch and brake windings (28, 35) mounted within an annular cavity (30, 36) of a ferromagnetic insert (31, 37) carried by the fixed structure.

Abstract: An anti creep braking system for a vehicle. A force transmission member is drivingly coupled to a part of the brake pedal and transmits braking force to a braking force generation system. A braked member is selectively braked by a braking device, and is driven by the brake pedal with a one direction force transmission device being interposed on the path of transmission of force between the brake pedal and the braked member. The sense of force transmission of the one direction force transmission device is such that, when the movement of the braked member with respect to the vehicle is prevented by the braking device, the brake pedal may be further depressed to increase vehicle braking action without transmitting substantial force to the braked member, but may not be moved backwards to reduce vehicle braking action.

Abstract: An electronic ratchet for allowing the application of mechanical resistance to an output shaft in one direction while ratcheting in the opposite direction, which comprises, in combination:(a) an electromagnetically controlled friction brake coupled to an output shaft;(b) provision for controlling the application of DC voltage across the electromagnet, regardless of the direction of rotation;(c) a switch for selectively applying such voltage to obtain resistance to clockwise, counter clockwise, or both directions of rotation;(d) an incremental shaft encoder coupled to the output shaft for determining the direction of shaft rotation;(e) a decoder for decoding the direction of shaft rotation; and(f) an armature through which the output shaft is inserted, the shaft and armature being held as a single rotating unit by opposing keys on the output shaft and the keyways being characterized by a degree of free play equal to the sensitivity of the shaft encoder, whereby the direction of shaft revolution can be determin

Abstract: A brake assembly includes a non-magnetic brake housing fixedly mounted to a motor shaft and a magnetic brake disc axially movable along the shaft in mechanically interlocked relationship with the brake housing between a braking position where it is attracted by an electromagnet against a fixed friction surface and a non-braking position into which it is biased by a pair of compression springs.

Abstract: Drum-type brakes and band-type clutches which are activated by expansion or compression, or both, of one or more concentric magnetic members, with conducting windings carrying electric currents. Circular annular mating members carrying one or more conducting windings expand or contract in diameter, due to magnetic forces caused by currents in the winding or windings, and operate as a brake or a clutch.

Abstract: Apparatus for electrically controlling the application and release of aircraft brakes. In one embodiment, the invention includes a slurry clutch controlling a reciprocating member which is operatively connected to the pressure plate. In another embodiment of the invention, a torque motor is adapted to have an armature which comprises a ball screw, the ball screw being in engagement with a longitudinal drive rod interconnected with the pressure plate. Rotation of the armature causes the drive rod to move the pressure plate into forceful engagement with the brake disk stack or to retract the same. In yet another embodiment of the invention, a plurality of torque motors are interconnected with a bull gear which is operative for driving the pressure plate.

Abstract: An electromagnetic brake wherein a first component is non-rotatably secured to a shaft or another rotary member and a second component of the brake is non-rotatably secured to a stationary part with freedom of movement in the axial direction of the first component. The second component contains a solenoid which is energizable to attract a friction generating liner of the second component against a disk of the first component and to thus arrest the first component. The width of the air gap between the first and second components can be adjusted by screws which extend radially of the first component or in parallelism with the axis of the first component and mesh with the stationary part. The conical or rounded tips of the screws can shift the second component toward the first component to reduce the width of the air gap. A polygonal array of leaf springs couples the second component to the stationary part and tends to move the second component axially of and away from the first component.

Abstract: A positive acting magnetic clutch and brake assembly characterized by including a movable, magnetic member provided with two sets of detents arranged respectively on its opposing outer surfaces. The member is alternately shiftable into either a brake position, in engagement with a braking post mounted to engage one of the sets of detents, or to a drive position in which a reciprocally mounted mechanical dog is engaged with the other set of detents in a non-slip driving coupling between the magnetic member and a clutch assembly. A reciprocal mounting arrangement for the dog enables the magnetic member to be moved into driving contact with the clutch assembly before the dog becomes positively engaged with any of the detents on the magnetic member.

Abstract: In an electromagnetic brake, disc shaped ferromagnetic armatures provide the braking effort and are included in stacks of brake discs flanking an annular electromagnet assembly formed by separate inner and outer annuli of ferromagnetic annuli, and an annular rigid coil unit concentrically between the annuli. The outer annulus is gapped so that a radial extension of the coil unit can pass through it, and fingers on one of the armature discs or upon a unit to which the brake is applied restrain the armatures, the coil unit, and any other stationary brake discs in the assembly against rotation. The armature discs may form either the innermost or the outermost discs in their respective stacks according to whether the brake is to be on or off when deenergized.

Abstract: An electromagnetically actuated drum type brake embodying an improved support for the actuating magnet. The magnet is supported by a lever and when energized effects pivotal movement of the lever to actuate the brake. The support between the lever and magnet permits some floating movement of the magnet so as to accommodate for surface irregularities and relative movement between the magnet and the lever as is necessary to effect brake actuation. The support, however, restricts the degree of relative movement between the magnet and lever to acceptable values while transmitting the actuating force from the magnet to the lever. The support comprises an integral tab formed at the outer end of the lever which extends into an aperture in the magnet with sufficient clearance to permit limited movement in several directions. Rotary movement is, however, not restricted by this connection.

Abstract: The electromagnet of an electrically controlled brake is prevented from rotating on its mounting pin by a bracket which also captivates the magnet against axial removal from the pin while leaving the magnet free to pivot and float axially on the pin. The bracket is made of a strip of resiliently yieldable material and includes a leg paralleling the pin and secured at one end of the magnet. The other end portion of the leg extends through a hole in the brake operating arm and is integral with a tang which engages the arm to captivate the magnet against axial removal from the pin.

Abstract: The preferred embodiment of the invention disclosed herein includes a motor operatively connected to drive a rotatable drum assembly including cutting means rotatable through a cutting station where brush and similar debris is cut into small chips. Adjacent the cutting station is a feed station from which the brush may be hand-fed to the cutting station and at the feed station is actuating means operative to actuate emergency shutoff means and emergency brake means, the former being operative to shut off the motor and the latter being operative to stop the rotation of the drum assembly. Preferably, the emergency brake means includes a band member including a brake lining located about the periphery of a portion of the drum assembly and having spaced apart end portions. One end portion of the band member is fixed to a frame and the other end portion is spring biased away from the drum assembly so that the brake lining is normally not engaged with the adjacent periphery of the drum assembly.