Abstract: A molded rotor assembly (20) for a vehicle alternator and method for making the same are disclosed. The rotor assembly includes first and second pole pieces (24,26) aligned along a longitudinal axis (40), the pair of pole pieces (24,26) defining a region therebetween. A coil wire (46) is located in the region. The pole pieces (24,26) and a slip ring assembly (36) are mounted on a rotor shaft (38). The slip ring assembly (36) has a pair of slip rings (102,104) connected to a pair of terminals (96,98) which are attached to respective free ends of the coil wire (46) to form a pair of connections (126,128). A molded insert (22) is injection molded filling the region between the pole pieces (24,26) thereby encapsulating the connections (126,128) and the coil wire (96) and forming a smooth cylindrical periphery on the rotor assembly (20).

Abstract: A short-circuiting and brush-lifting device comprises a rotatable actuating ring having with brush-actuating rods levers cause the brushes of the motor to lift up via the rotating actuating after the slip rings have been short-circuited as a result of the axial displacement of a short-circuiting ring. To make the device wear-resistant and insensitive to contamination, the actuating ring supports three rollers, with which it abuts in the starting position on the spring-loaded short-circuiting ring. The actuating ring is guided exactly in parallel by three axial guide rods, which are disposed perpendicularly to the brush-actuating rods. The configuration of all articulated joints of these rods is adjusted so as to allow the points of maximum excursion of the deflection of the articulated joint of the axial guide rods and the brush-actuating rods are exhibited at staggered times.

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 rotor for an alternating current generator of a type that has two pole segments provided with interleaved pole teeth and a core disposed between the segments that carries a field coil. The shaft of the rotor carries a slip ring assembly having two metallic slip rings. A ball bearing is disposed between one of the pole segments and the slip ring assembly. A portion of the shaft that is located inside of the inner race of the ball bearing has a pair of slots and wires for connecting the field coil to the slip rings are located in the slots and inside the inner race of the bearing. The electrical connections between the ends of the field coil and the slip rings includes wires that are twisted together to form twisted wire portions. The twisted wire portions are locked or fixed to a fan that is formed of thermoplastic material by material of the fan that completely encircles portions of the twisted wire portions.

Abstract: A slip ring includes a rotor and a stator. Stator contacts are connected to a data acquisition unit. The rotor contacts are connected to an amplifier circuit mounted in a housing connected to and rotatable with a rotating member. A sensor mounted on the rotating member to which the rotor is also fixedly mounted generates an electrical output signal corresponding to a sensed operating parameter of the rotating member. The sensor output signal is amplified by the amplifier in the housing before being transmitted through the slip ring to the data acquisition unit. Vibration isolation is provided when required for the slip ring and the circuit board in the housing carrying the amplifier to dampen vibrations generated by the rotating member. Resilient pads are mounted on the circuit board and engage the housing attached to the rotor.

Abstract: A slip ring device comprises a cylindrical body of an insulating material, at least one ring of an electrically conductive material fitted on the outer periphery of the cylindrical body, at least one strip member of an electrically conductive material arranged on the outer periphery of the ring, a coupling member, situated between the strip member and the outer periphery of the ring, for electrically coupling the strip member and the outer periphery of the ring, at least one lead member of an electrically conductive material, having one end portion electrically connected to the ring and the other end portion led out of the inner periphery of the cylindrical body, and a brush unit of an electrically conductive material, situated in electrical contact with the strip member.

Abstract: A slip ring with which a pair of brushes make contact includes a conducting portion which extends along an outer periphery of the slip ring over an angle of preferably about 210 degrees, and a non-conducting portion which extends over an angle of about preferably 150 degrees. A conductor which forms the conducting portion has a ring-like shape and also forms the non-conducting portion. The portion of the conductor which corresponds to the non-conducting portion has a small radius such that it is buried in an insulating resin material, a window through which an insulating resin material is exposed, or a recess through which an insulating resin material is exposed. The ring-like conductor provides a balanced center of gravity to the slip ring. The conductor may also include two or more conducting portions and two or more non-conducting portions.

Abstract: A brush and slip ring apparatus for an alternating current generator. A brush assembly is secured to a rotor shaft of the generator to rotate therewith. The brush assembly includes two axially spaced brushes that are pivoted to a brush support that is secured to the shaft. When the shaft is rotated, the brushes move outwardly away from the shaft due to centrifugal force. The brushes respectively engage two axially spaced fixed slip rings that surround the brush assembly. The brushes are maintained engaged with the slip rings due to centrifugal forces developed by the pivotally mounted brushes. The brushes are connected to a field coil of the rotor of the generator.

Abstract: A high speed communication apparatus for a Computerized Axial Tomography (CAT) scanner utilizes large diameter slip rings to permit continuous rotation of a rotatable gantry. A communication signal is applied at a first point on one slip ring, and is terminated by a resistive termination point 180.degree. opposite the driving point. The communication signal may then be received at any point on the slip ring by a receive connection and a matching receive connection which are 180.degree. opposite one another. The drive and termination connections to the slip ring may be made by brushes, with the receive and matching receive connections being made by a physical connection to the slip ring. Alternately, the drive and terminate connections may be made by physical contact, with the receive and matching receive connections being made by brushes.

Abstract: A hair cutting device comprising a clipper head with powered cutting means. A vacuum pickup tube has a flat entry nozzle extending across the cutting means, tapering back to a circular tubular configuration. The pickup tube is connected to a disposal hose, which is connected to a source of vacuum and the pickup tube is free to rotate on the disposal hose so that the clipper head can be manipulated without twisting the hose. Electric power means include means to maintain electrical contact throughout rotary movements of the clipper head.

Abstract: A slip ring with which a pair of brushes make contact includes a conducting portion which extends along an outer periphery of the slip ring over an angle of preferably about 210 degrees, and a non-conducting portion which extends over an angle of about preferably 150 degrees. A conductor which forms the conducting portion has a ring-like shape and also forms the non-conducting portion. The portion of the conductor which corresponds to the non-conducting portion has a small radius such that it is buried in an insulating resin material, a window through which an insulating resin material is exposed, or a recess through which an insulating resin material is exposed. The ring-like conductor provides a balanced center of gravity to the slip ring. The conductor may also include two or more conducting portions and two or more non-conducting portions.

Abstract: A slip ring assembly having a rotatable chamber including a shaft rotatably mounted therein. A plurality of slip rings are provided within a ring section of the rotatable chamber and are mounted to the shaft for rotation therewith. The plurality of slip rings for a group of preselected pairs of slip rings. An electrical conductor is connected to each slip ring with each electrical conductor being twisted to at least one adjacent electrical conductor through a central core in the shaft to thereby cancel alternating current due to self-generated voltages. The slip ring assembly also includes a brush assembly having at least one brush support associated with each slip ring with each brush support having brushes extending therefrom in contact with its corresponding slip ring at at least two brush contacts. The brush contacts for each slip are orientated approximately 180 degrees apart.

Abstract: A direct - current electric machine includes a rotor rotatable about an axis of rotation and a stator formed with a plurality of locations angularly equispaced thereon and provided with a respective array of horseshoe magnets extending over 180.degree. about a respective helical coil wounded on a coil axis defined by a respective pair of arms mounted on the rotor and coinciding with a tangent to a circle centered in the axis of rotation.

Abstract: A method of manufacturing an annular base portion of an electrical slip ring assembly having a plurality of conductive rings formed in the outer circumferential surface thereof is described. The slip ring base is molded, and grooves are machined into the outer circumferential surface thereof. Conductive strips are cut into a series of lengths forming conductive rings to be placed about the outer circumference of the annular base member. The individual lengths of conductive material are anchored to the outer circumferential surface of the slip ring base and a rolling pressure is exerted on them about the circumference of the base to cause the rings to be press fit into the grooves previously formed on the base. When the complete circumference of the ring has been press fit into its respective groove, the other end of the conductive ring is then secured to the base.

Abstract: An electrical machine which has a rotor positioned within a housing. The rotor has a pair of spaced-apart engagement portions, which, preferably, are tapered. The engagement portions are engaged by collectors or brushes which are arranged in annular configuration around the engagement portions. Retainer support the collectors and serve as electrical conductors with respect to the collectors. Wick elements engage the tapered portions of the rotor adjacent the collectors and provide lubrication and coolant fluid to the collectors and to the surfaces of the engagement portions of the rotor. Actuator mechanisms continuously urge the retainer members and the collectors in an axial direction upon the engagement portions to automatically compensate for wearing action between the collectors and the engagement portions of the rotor. A stator encompasses the rotor to create a magnetic field which encompasses the rotor.

Abstract: A high speed communication apparatus for a computerized axial tomography (CAT) scanner utilizes large diameter slip rings to permit continuous rotation of a rotatable gantry. A communication signal is applied at a first point on one slip ring, and is terminated by a resistive termination at a point 180.degree. opposite the driving point. The communication signal may then be received at any point on the slip ring. The drive and termination connections to the slip ring may be made by brushes, with the receive connection being made by a physical connection to the slip ring. Alternately, the drive and terminate connection may be made by physical contact, with the receive connection being made by a brush.

Abstract: A slip ring arrangement for feeding electrical current to, or receiving electrical current from, coil windings which are mounted on a rotatable shaft for rotation therewith, the slip ring arrangement comprising a first slip ring of electrically conducting material which is substantially cylindrical and which is mounted on the rotatable shaft, adjacent one end of the rotatable shaft, for rotation therewith; and a second slip ring of electrically conducting material which is electrically isolated from the first slip ring, which is substantially flat, and which is mounted on the said one end of the rotatable shaft for rotation therewith. Suitable for use with alternators. Allows reduction in length of slip ring arrangement and rotatable shaft. The second slip ring reduces wear on its contacting brush.

Abstract: An epoxide resin moulding composition, comprising(a) a phenol or cresol novolak epoxide resin,(b) dicyandiamide as a hardener,(c) an accelerator suitable for hardening with dicyandiamide,(d) 20 to 70% by weight of calcium carbonate and(e) 10 to 60% by weight of glass fibres, the quantity of components (d) and (e) together not exceeding 80% by weight, relative to the total weight of the epoxide resin moulding composition,is suitable with advantage for the manufacture of commutators and slipring bodies.

Abstract: An automotive AC generator or alternator has a protective structure for fluid-tightly closing a brush unit and its associated components to thereby prevent water or oil from entering thereinto. The protective structure includes a brush holder for encasing brushes and a slip ring cover for covering slip rings. The brush holder and the cover are coupled to each other with axial recesses being engaged with associated projections. The thus coupled brush holder and slip ring cover are fixed while being pressed in the axial direction toward a rear frame of the alternator by a rear cover thereof with a seal member interposed between axial end faces of the brush holder and slip ring cover and the rear frame and with another seal member interposed between the other axial end faces of the brush holder and slip ring cover and the rear cover.

Abstract: A slip ring assembly having a slip ring holder made of a composite dielectric material reinforced by layers of fabric is molded with the slip rings positioned in the mold, or alternately, grooves are machined in the holder for receiving the slip rings. The holder has at least one flange for mounting the assembly on a rotating part such as a spinner bulkhead of an aircraft propeller assembly. Slip rings are adhered to the composite material of the holder as a result of molding, or use of an adhesive where the grooves are machined in the holder.The metallic wire connections fastened to the slip rings by welding also serve to hold the slip rings in the grooves of the holder. The wire connections may have pins for receiving mating receptacles. Openings in the ends of the metallic wire connections are suitable for crimping wire connectors to the deicers or deicer terminals.

Abstract: A wireless slip ring assembly includes inner and outer subassemblies mounted together for undergoing rotation relative to one another. The inner subassembly includes a sleeve composed of axially spaced annular slip rings and a printed circuitboard mounted within the sleeve having spaced longitudinal sides connected at longitudinal edges and spaced conductive paths defined on the longitudinal sides and extending to the edges. The conductive paths are spaced from interior sides of the slip rings except at the longitudinal edges of the circuitboard, where each conductive path is electrically and rigidly connected to one slip ring.

Abstract: A collector ring installation and lead terminating assembly comprising cooperating terminals (40,40'), poke-in terminals (60,60'), and collector ring leads (50,50') for forming an electrical connection between a collector ring assembly (30) and a rotor winding of a rotor (10).

Abstract: To protect the space within which the slip rings (20a, 20 b) of a vehicular-type alternator operate, against extraneous contamination, a plastic sleeve (29) with an axially extending gap (35) is snap-connected with the inner wall defining an opening (28b) of a connection plate (23) already present in the alternator; this retains the sleeve (29), preferably of plastic, within the alternator, the other axial end thereof being secured to an internally extending projection from the B-end shield (15), either formed by a plastic bushing (19) surrounding the B-bearing (18) or an internal flange (36) already present on the end shield (15).

Abstract: A method for making a slip ring assembly contemplates welding to one face of each of a plurality of varying diameter concentric conducting rings a plurality of electrically conducting studs, positioning a plurality of the rings within grooves inscribed in a first mold section in an accurately spaced concentric arrangement with respect to each other, surrounding the rings radially interiorly thereof with one or more pre-cut insulating plies, placing insulating material in the spaces between the concentrically spaced rings and radially outwardly thereof, positioning a plurality of pre-cut insulating plies axially of the rings and insulating material aligned to permit passage of the studs through pre-cut holes in the plies, closing a second mold section on the first mold section, and heating the assembly under pressure in the mold sections until the assembly is cured.

Abstract: A slip ring assembly for an alternator or like electrical apparatus is disclosed which is configured for efficient and accurate fabrication. The assembly includes a jig-like positioning member upon which first and second annular slip ring members, and respective first and second terminals, can be pre-assembled. These pre-assembled components are positionable within a molding assembly for formation of the body of the slip ring assembly.

Abstract: A slip ring assembly for an alternator or like electrical apparatus is disclosed which has been particularly configured for highly efficient formation by an injection molding process. The assembly includes a unitary body configured for mounting on the rotor shaft of the associated apparatus, with the assembly further including first and second axially spaced slip ring members positioned on the body. First and second terminals are provided which are respectively electrically joined to the first and second slip ring members, with the terminals extending axially of the body and outwardly of an end of the body which is adjacent to the first slip ring member. The configuration of the body of the assembly is such that it can be very efficiently injection molded, with the slip ring members and terminal elements thereafter positioned on the body for completing fabrication of the assembly.

Abstract: An electrical machine in which power is supplied to the rotor via brushes and sliprings having an improved brush-dust suction apparatus, including brush supports and ring-shaped collecting chambers which are penetrated by brush bolts. The suction openings of these collecting chambers circumscribe the slipring in a ring pattern. Each collecting chamber is connected by thick-walled glass cylinders to a common collecting chamber, which is connected to a negative pressure source, when the air and the brush dust entrained in the air is conveyed to an exterior chamber. The brush supports are fastened by insulators to the collecting chamber and are mutually reinforced by insulator bolts.

Abstract: An alternator rotor has a rotor shaft formed integrally on the center of a rotary magnetic pole assembly having a field coil wound thereon. The rotor shaft has an axial hole formed in one end surface thereof such as to extend axially inwardly and to receive a slip ring supporting shaft. The alternator rotor further has a slip ring assembly, including a couple of slip rings, conductor wires leading from the slip rings, respectively, and the slip ring supporting shaft, which are formed in one body by molding with an insulating material. The slip ring assembly is fixed to the rotor shaft, with the slip ring supporting shaft press-fitted in the axial hole of the rotor shaft.

Abstract: A rotor for an alternating current generator in which the rotor shaft carries a pair of pole members and a core member. A spool that is formed of electrical insulating material is carried by the core member and has ribs that fit within slots formed in the core member. The spool supports a field coil, the inner turns of which engage the ribs and portions of the core disposed between the ribs. The rotor shaft supports a cooling fan that is formed of electrical insulating material. The fan is connected to a plurality of posts that extend axially from the spool. The fan supports a pair of lead wires that connect the field coil to the slip rings of a slip ring assembly.

Abstract: A homopolar generator includes a stator producing a magnetic field and a rotor which rotates in the stator magnetic field to generate electrical discharge current. The current is available from a slip ring surface defined on the rotor, and a plurality of brush mechanisms are provided to collect and transfer the discharge current from the rotor slip ring. Each brush mechanism includes a brush pad for contacting the rotor slip ring. The brush pad is attached to one end of a laminated trailing arm brush strap. A brush actuator forces the brush pad into contact with the rotor slip ring against the yieldable brush lifting force of the brush strap. To compensate for the reaction between adjacent brush straps due to the magnetic fields set up by the discharge current being transferred by each, a conductor strap is electrically connected to the end of the brush strap opposite the attached brush.

Abstract: In a slip ring suitable for appliance to a steering system of a vehicle a plurality of contacts arranged axially have spacers among them and flexible contacts are in elastic contact with the respective plurality of contacts. Accordingly, the flexible contacts are relatively rotated to the plurality of contacts at a time of the rotation of a steering wheel of the vehicle while the plurality of contacts and the flexible contacts are kept in a conductive condition therebetween, so that many switches can be mounted on the steering wheel.

Abstract: A slip ring assembly comprises an insulating body having a pair of slip rings on its external surface, each slip ring having electrically connected thereto a respective connector element a part of which is disposed radially inwardly of the slip rings. The body has an internal bore which receives a shaft of a rotary electric machine in use, a side wall of the bore being provided with axially extending recesses which are disposed radially inwardly of the connector element parts respectively. The presence of these recesses, which may alternatively be of helical or annular configuration, ensures that the connector elements do not contact the aforementioned shaft in operation and thereby create a short-circuit. The slip ring assembly is produced by placing the rings and the connector elements in an annular mould cavity whose radially inner surface has projections thereon which correspond to the desired configuration of the recesses in the completed assembly.

Abstract: An a.c. generator for a car comprises a waterproof cylinder made of a plastic resin which covers the outer periphery of slip rings, a first flat plate to separate and insulate an external terminal from a bracket, and a second flat plate extending toward a rectifier with a predetermined gap between the second flat plate and the rectifier.

Abstract: An eddy current coupling (11) includes a housing (13, 15, 17), a rotor (29), an inductor drum means (25), coil means (41) for electro-magnetically coupling the rotor member and the inductor drum means and a slip ring assembly (45) for energizing the coil. The slip ring assembly includes a first support member (55) connected to the rotor member for rotation therewith, slip ring means (47, 49) for energizing the coil means supported by the first support member, a second support member (56) and brush means (51, 53) supported by the second support member. The first and second support members define a sealed chamber (80) in which the slip ring means and brush means are located. A passageway means (92) is provided from the sealed chamber for directing wear debris generated by the contact between the brush means and slip ring means from the sealed chamber. An impeller (98) is provided for impelling the debris through the passageway means and from the chamber.

Abstract: A ball contact slip ring assembly for conducting electrical signals between two relatively rotating structures, and which is particularly suited for use in gimbaled inertial guidance systems. The assembly includes a slip ring disposed on one structure and a brush associated with the ring on the other structure. The slip ring is provided with a groove which extends around the outer circumference thereof and the slip ring may be composed of a relatively soft noble metal. The brush comprises a pair of spring-biased, resilient arms spaced from one another, each arm having an electrically conductive ball secured thereto which is adapted to ride within the groove of the slip ring and accommodate diverse motion while maintaining a consistent electrical contact.

Abstract: A slip-ring arrangement for electrical machines,especially asynchronous machines, for the directional elimination of heat and for the removal of brush abrasion elements having several slip rings, located next to one another, the slip rings being provided with axial cooling-gas bores which are intersected by grooves or slots in each slip-ring surface. These cooling-gas bores are guided--separately for each slip ring--through axially extending insulating tubes to a suction fan, preferably a radial fan so that heat lost is eliminated directly at its point or origin.

Abstract: Insulation between a rotor shaft and slip rings for electrical connection to a rotary winding is provided by a layer coating the shaft that is sintered in place from fluidized bed material, providing a thin layer that is sufficiently tough for slip rings to be mounted on top so that the layer provides the insulation from the shaft. The slip rings may be quite thin, thus keeping the active surface of the slip ring to a very small diameter. Brass and bronze slip rings may be press-fitted onto the shaft while maintaining the insulation of the layer, but carbon slip rings, which are desirable for long life are best secured by means of an adhesive. The slip ring assembly is particularly useful for three-phase alternators of motor vehicles.

Abstract: A pair of brushes respectively slidably engage radially outer surfaces of first and second electrically conductive rings which are disposed co-axially and are rotatable about their common axis. The first ring surrounds an axial portion of the second ring and is electrically insulated therefrom by a thin layer of insulating material, while the second ring is mounted on a rotary shaft and is electrically insulated therefrom similarly by a thin layer of insulating material. The second ring may be axially stepped so that it has a smaller diameter portion which is surrounded by the first ring and a larger diameter portion which is engaged by the respective brush.

Abstract: A slip ring and brush assembly comprises a gold plated slip ring surface and a bundle of conductive fibers in the 2 to 3 mil size range. During use, gold transfers from the ring to the fibers, and the resulting gold-on-gold contact interface of ring and brush is extremely noise free and long wearing.

Abstract: A full rotational, substantially zero friction electrical conductor assembly conducts relatively high electrical currents between a pair of relatively rotatable members. Electrical conductor modules are axially stacked to provide multiple circuit capabilities wherein each module has a pair of electrical conductive rings affixed to the rotatable members defining an annular radial gap therebetween. A plurality of resilient filamentary conductor loops are disposed between these conductive rings, and the loops contact, roll on, and are captured by the conductive rings thereby providing electrical continuity between the relatively rotatable members. Loop separating spools are interspaced between and in rolling contact with the conductor loops to prevent the loops from touching one another and generating frictional losses. A circular raceway, carried by one of the rotatable members, keeps the spools in rolling alignment with the loops.

Abstract: A direct-current motor has a housing in which a stator and a rotor are mounted. A commutator is located in the housing but spaced from the stator and the rotor and subdivided from the same by a transverse housing wall. A magnetic coupling having two relatively rotatable elements is mounted in the housing extending through the transverse wall and the two elements define with one another an air gap in which a hood-like partition is located which is sealingly connected with the transverse wall so that the commutator is sealingly separated from the stator and rotor but is driven by one of the parts of the magnetic coupling which in turn is magnetically driven by the other part of the coupling that receives torque from the shaft of the motor.

Abstract: In order to prevent the exertion of high pressure during the installation of electrical slip rings on the armature shafts of electrical machinery, and to provide secure holding of the slip rings without exerting radial stresses, the slip ring retainer mechanism according to the invention provides pressure rings which are mounted on the armature shaft and which engage respective end faces of the electrical slip ring. In a preferred construction, the slip rings are loosely slipped over an intermediate metallic bushing on which the compressive rings are then press-fit so as to bear against the sides of the slip rings. The intermediate bushing has an outer insulating layer and the pressure rings may be provided with electrical connectors for coupling to the exciter windings on the armature. The end faces of the slip rings may be suitably shaped or grooved to make form-fitting engagement with similarly shaped mating surface features of the compression rings.

Abstract: A slip ring cooling device for electrical rotary machine comprises a plurality of closed chambers axially extending in the peripheral portion with intervals therebetween in the peripheral direction, and an annular passage at one side. The closed chambers each are defined by the surfaces of holes made in the slip ring so as to axially extend at the peripheral portion of the slip ring. The axially extended holes have open ends and closed ends. The annular passage is fluidly connected to each of said open ends so that said closed chambers communicate with said annular passage. A volatile liquid poured in said passage is distributed uniformly to each of said closed chambers by centrifugal force applied thereon upon the rotation of the slip ring. The distributed liquid is evaporated by the slip ring and brushes contacting the slip ring to form vapor. The vapor is transferred to the lower temperature portion by the pressure difference to be cooled and condensed, whereby the slip ring is cooled.

Abstract: A rotary electrical junction assembly includes a rotor and a stator separable into halves for installation and maintenance. Preferably, the rotor has brushes and the stator has split slip rings engaged by the brushes. The slip ring halves are interconnected with corresponding ring halves and are positioned on individual nonconductive backing members stacked together to form slip ring stacked halves mounted on the stator halves. The backing members are semicircular and each includes a circumferential insulator wall with opposite ends which overlap to provide concinuous insulation between adjacent slip rings. The brushes are mounted on brush racks having rollers to engage tracks on the stator. A split outer housing covers the rotor and stator and has recesses receiving the brush racks. The housing is clamped onto a rotary support member and the brush racks revolve about the stator upon rotation of the rotor support member, thereby providing continuous conductive contact between the brushes and slip rings.

Abstract: A homopolar machine designed to operate as a generator and motor in reversibly storing and transferring energy between the machine and a magnetic load coil for a thermo-nuclear reactor. The machine rotor comprises hollow thin-walled cylinders or sleeves which form the basis of the system by utilizing substantially all of the rotor mass as a conductor thus making it possible to transfer substantially all the rotor kinetic energy electrically to the load coil in a highly economical and efficient manner. The rotor is divided into multiple separate cylinders or sleeves of modular design, connected in series and arranged to rotate in opposite directions but maintain the supply of current in a single direction to the machine terminals. A stator concentrically disposed around the sleeves consists of a hollow cylinder having a number of excitation coils each located radially outward from the ends of adjacent sleeves.

Abstract: Disclosed is a current supply arrangement for an electric machine rotor winding, comprising a slip ring made of a high-strength steel, fitted onto the rotor shaft with an electrically insulating layer therebetween, and adapted to be engaged by contact brushes of current collecting bars of the contact brush device. The slip ring is provided with a cylindrical recess cut in the end face thereof and disposed coaxially with the inner opening of said ring. The recess serves to receive a distributing ring made of a material having a high electrical conductivity, and provided with a current conducting bar secured thereto and electrically connected to the rotor winding by means of current conducting screws and a number of current supplying bars. The distributing ring is adapted to make electrical contact with the slip ring through an additional electrically conductive layer made of a homogeneous material and having a resistivity lower than that of the slip ring material.

Abstract: A current supplying device comprises a slip ring mounted on a rotor shaft with an electrically insulating layer interposed therebetween, and contacting the brushes of the current collecting bus bars of the brush contact device of an electric machine. At least on one end of the slip ring a distribution ring is mounted to which a current supplying bus bar electrically connected with the rotor winding is secured and which contacts the slip ring through an additional electrically conductive layer formed of a material with a lower specific electric resistance than that of the material of the slip ring. Both the slip ring and the distribution ring are provided with through holes arranged around the circumference of these rings and having longitudinal axes parallel to longitudinal axes of these rings. Each one of the through holes of the slip ring corresponds to one of the through holes of the distribution ring and is coaxial therewith, so that they form an integral ventilating channel.

Abstract: A brush holder and slip ring assembly in which the housing of the brush holder and the rotor body of the slip ring assembly are both made of plastic. Conductive terminal strips have portions encapsulated by the plastic of the housing of the brush holder and are adapted to make contact with axially spaced brushes. Conductive terminal strips and slip rings are partially encapsulated by the plastic of the rotor of the slip ring assembly, the slip rings being disposed in contact with the brushes.

Abstract: An improved slip ring and brush assembly such as for carrying the return signal pulse to a glow discharge tube on a rotating disc sonar. The rotating disc is made of insulating material and has a cylindrical hub which is adapted to fit over a corresponding hub on a motor shaft. Annular slip rings made of conductive plastic are adapted to slip over the cylindrical hub and are indexed against relative rotation by means of cylindrical bulges or projections on opposite sides of the hub. These projections serve to carry the electrical connections, in the form of threaded screws and springs that are adapted to contact the slip rings, one set for one slip ring, and the other for the other slip ring. The slip rings are separated by thin insulating washers of larger diameter than the rings. The brushes are made of graphite fibers and have excellent flexibility, conductivity and long life.

Abstract: An apparatus for transferring electrical current between two electrical conductors which can be rotated relatively to each other via an auxiliary coaxial rotor arranged radially outside both conductors and provided with two grooves containing liquid metal the conductors having annular contact flanges being submerged into the two rings of liquid metal, respectively.