Abstract: A stator includes projecting portions extending from an outer edge of a plurality of stator laminations. The projecting portions form a point. When the stator is inserted into a motor housing, the projecting portions scrape along an inner surface of the housing. The contact between the projecting portions and the housing achieves a bond between the stator and the housing.

Abstract: A motor stator comprises a first stator frame part, a second stator frame part including first and second pole portions separated by a stator bridge, and two magnetic arms. Each of two bobbins is wound with a coil and situated on a respective one of the arms. The first and second stator frame parts are coupled by the arms so as to leave an opening between the two bobbins and the first and second frame parts for insertion of a rotor.

Abstract: A magnetic actuator (10) suitable for the operation of electric circuit breakers which uses a laminated yoke structure (12) to increase permanent magnet flux holding forces. The actuator comprises a magnetic yoke (12) which forms both low and high reluctance flux paths with at least one permanent magnet (30) and an armature (40) axially reciprocable in a first direction within the yoke (12). The actuator is configured to provide a first low reluctance flux path and a first high reluctance flux path when the armature (40) is in a first position and a second low reluctance flux path and a second high reluctance flux path when the armature (40) is in a second position. A pair of electromagnetic coils (60, 61) are used to drive the armature (40) between the first and second positions.

Abstract: A rotor assembly for a synchronous reluctance machine has a plurality of steel punched star-shaped supports secured along a shaft at spaced locations for retaining a plurality of laminated rotor sections. The star-shaped supports have four equiangularly spaced arms having arcuate valleys disposed therebetween that define a plurality of channels for receiving the rotor sections. The rotor sections have a plurality of linearly-disposed apertures for receiving mounting members that extend radially from the valleys of the star-shaped supports. The portions of free ends of the mounting members that extend through the apertures, are stamped or formed to secure the rotor sections to the star-shaped supports. A rotor bar may be disposed within a concave cavity defined by the rotor sections to reduce audible noise produced as the rotor rotates at a high rate of speed.

Abstract: A method and apparatus for manufacturing a lamina stack having laminas with a plurality of outer perimeter configurations. Each of the outer perimeter configurations has at least one common choke surface. The common choke surfaces form, when the laminas are stacked, a choke contacting surface on the outer perimeter surface of the lamina stack which extends continuously in the axial direction from the top lamina to the bottom lamina. The invention provides a method for manufacturing interlocked lamina stacks using a selectively actuated punches in a die assembly to stamp laminas with a plurality of outer perimeter configurations and to stack the laminas in a choke barrel with an alignment surface which cooperates with the common choke surface and securely holds the stamped laminas in position while the stack is being formed. Rotation of the choke barrel compensates for strip thickness variations.

Abstract: Methods of manufacturing a magnetic device and a manufacturing tool employing the methods. One of the methods includes the steps of: (1) applying an adhesive between opposing end faces of first and second core-portions of a magnetic core of the magnetic device, (2) placing the first and second core-portions proximate a permanent magnet during a cure-time of the adhesive, the permanent magnet causing the first and second core-portions to be magnetically attracted to one another to fix the first core-portion relative to the second core-portion and (3) separating the permanent magnet from the first and second core-portions following expiration of the cure-time, the adhesive thereafter fixing the first core-portion relative to the second core-portion.

Abstract: A method for manufacturing laminated parts in which spacing of individual laminas is maintained during the manufacturing process. As the laminas are stamped from strip stock material, a staking lug is formed in each lamina. The staking lug comprises an attaching lug, having a corresponding attaching cavity on an opposite surface, and a separation lug. The mating attaching lugs and cavities keep the spaced stack in a single unit configuration while the separation lug ensures adequate spacing between individual laminas for annealing and/or insulation of the individual laminas. The staking lug is preferably formed in one stamping step in a punch press machine, and eliminates the need for rotation of the laminas or alternate stamping methodologies, simplifying the laminated part manufacturing process.

Abstract: A monolithic thick film inductor is made by printing alternating conductive layers and dielectric layers above one another, using the same dielectric printing screen and the same conductor printing screen for printing each of the dielectric layers and the conductive layers respectively. Each of the coil printing screen and the dielectric screen are indexed to n different positions in order to print each of the n layers. The resulting inductor includes a plurality of helical coil segments stacked above one another and electrically connected to one another to create the desired number of coil turns.

Abstract: In a non-oriented electromagnetic steel sheet including about 0.01 wt % or less of C, about 1.0 wt % or less of Si, Mn in a range of about 0.1 wt % to 1.5 wt %, Al in a range of about 0.2 wt % to 1.5 wt %; the steel sheet having a critical amount of about 2 to 80 ppm rare earth metal, and the quantities of Ti and Zr in the steel sheet being limited to about 15 ppm or less of Ti, and about 80 ppm or less of Zr. The sheet exhibits excellent magnetic characteristics, such as iron loss, even when punched and laminated sheets are stress relief annealed at a low temperature for a short period of time.

Abstract: An apparatus and method for manufacturing laminated parts from a plurality of laminas, in which the laminas for forming the laminated parts are blanked from strip stock material. The laminas and are then cut and stacked to form the laminated part. The apparatus includes a measuring device, such as a linear variable differential transducer, for measuring the thickness of successive sections of the strip stock at a first location of each section. The measuring device also measures the thickness of the strip stock sections at a second location of each section. A controller, such as a computer or a programmable logic controller, receives the thickness values at the first location and second location of the strip stock sections from the measuring device and computes a value of a difference therebetween. The controller also computes a running sum of the difference values for the strip stock sections and compares the difference values sum to a predetermined value.

Abstract: Two sets of a combination of an iron core formed of laminated strip-shaped electromagnetic steel plates and a coil are arranged in parallel, and these are abutted via core gap spacers against two iron cores formed of laminated trapezoidal electromagnetic steel plates, so that a square-shaped magnetic path is formed. Two outside iron cores of the four iron cores are coupled and fixed with metal fittings. With such an arrangement, the coil is divided into two, with increased surface areas of the coils and therefore an improved cooling characteristic. Further, since the electromagnetic steel plates used for the iron cores can be formed into simple shapes, electromagnetic steel plates of various sizes can be easily manufactured, so that iron cores of optimum dimensions can be provided, optionally depending on the type of the reactor.

Abstract: A tandem press system for the high speed manufacture of rotor cores and stator cores of electric motors. The tandem press system includes a rotor press and a stator press arranged in series for stamping out laminations from a web of stock material and pre-assembling them into rotor cores and stator cores, respectively. Structure is provided between the rotor and stator press to maintain control of the web and provide a substantial barrier to transmission of vibrations in the web to the stator press. The rotor and stator presses are capable of shifting from stamping one type of lamination to stamping another type of lamination without any interruption in the operation of the presses.

Abstract: A dynamoelectric machine constructed for speed and accuracy of manufacturing has a stator core constructed of 90.degree. symmetrical stator laminations and the windings have differing numbers of poles which overlap in slots of the stator core are wound of the core formed by the laminations in unique fashion. The rotor bars of the machine are skewed to optimize performance of the machine when in the form of a single phase induction motor. Magnet wire leads of the windings are connected directly to terminals on a plug and terminal assembly which is formed for positive location on an end frame of the machine without welding or other fastening to the end frame. The end frames of the machine and stator laminations forming the stator core are formed so as to increase the precision of the final position of the stator relative to the rotor assembly of the dynamoelectric machine. The end frames are constructed for grounding without the use of fasteners or wire.

Abstract: A method of splicing the platen component of a linear stepper motor to extent its range of travel for various applications is disclosed. In a linear stepper motor the so-called forcer or armature component moves linearly along the platen or stator in the manner of a track assuming discrete locations in response to the state of the electrical current in the field windings of the forcer. Conventional machining equipment limits the maximum length of the platen that can be produced for such a motor. Because various industrial applications demand an extended length of the platen component, the splicing method enables two or more platen components to be arranged in an end-to-end relation while maintaining positional accuracy, preventing air loss from the air bearings typically utilized with such a motor, and maintaining the magnetic flux path necessary for proper operation of the forcer component of the motor.

Abstract: A dual action indexing system and method for relatively rotating a lamina and a partial lamina stack in a progressive die assembly. The dual action indexing system includes a mechanical indexer such as a roller gear cam which provides a large indexed rotational movement to correct for thickness inconsistencies in the laminas and a relatively small and fast servo motor to provide a small indexed rotational movement to provide a desired skew angle. The rotational movements of the mechanical indexer and servo motor are combined by a phase adjuster. The combined rotational movement is used to rotate a choke barrel into which the laminas are punched to form a lamina stack. The operation of the servo motor is regulated by a controller and may thereby be conveniently and rapidly adjusted.

Abstract: A current sensor operable over a selected operating frequency range includes a flux concentrating core. The core is fabricated by forming a series of tape-wound laminations into a desired closed shape, securing the laminations together at a point and removing material at the point to create a gap.

Abstract: A rotor (10) includes a plurality of permanent magnets (14) disposed around a shaft (12) at generally equal intervals, and a plurality of laminated core members (16) disposed between the permanent magnets (14) so as to form magnetic poles. The laminated core members (16) are formed by stacking a plurality of core-laminations (26) made of magnetic materials and an integral core-lamination, and joining them to each other. The integral core-lamination includes a plurality of core-lamination sections each having a shape the same as that of the core-lamination (26), and connecting portions (46) for connecting adjacent core-lamination sections with each other.

Abstract: An apparatus and method for manufacturing laminated parts from a plurality of laminas, in which the laminas for forming the laminated parts are blanked from strip stock material. The laminas and are then cut and stacked to form the laminated part. The apparatus includes a measuring device, such as a linear variable differential transducer, for measuring the thickness of successive sections of the strip stock. A controller, such as a computer or a programmable logic controller, receives the thickness value of the strip stock sections from the measuring device. The desired stack height is inputted into the controller, as well as a protuberance or dimple height. A punching device, such as one or more front and rear slide operated punches, is also included which is activated by the controller to provide a protuberance at selected locations upon the strip stock sections.

Abstract: A method of assembling a three phase current transformer for printed circuit board installation. Three current transformers, each having a spin wound coil positioned about one leg of an unassembled continuous lamination core, are placed side-by-side in a transformer carrier such that two parallel core legs of the center transformer overlap the adjacent core legs of the two outside transformers and further such that printed circuit board terminal pins attached to the coils pass through stand-off sleeves formed from the transformer carrier. Rivets are placed through holes in the laminations of the overlapped core legs and in the transformer carrier thereby simultaneously riveting the three transformer cores and the transformer carrier together making a three phase transformer assembly.

Abstract: The present invention involves a method and apparatus for forming a centrally interlocked stack of laminations for rotors. A centrally located, circular indentation is formed in each lamination. The indentation provides corresponding projections and depressions in the laminas which may be interlocked by engaging adjacent depressions and projections. Using a progressive die assembly, laminas are blanked from stock sheet material and punched to form the projection/depression. The machine for manufacturing the laminations includes a blanking station including a punch for forming the projections/depressions, and a rotating and stacking station. The projection/depression forming station includes a counterforce which is applied when punching the projection/depression so that the stock material is relatively flat. The laminations are blanked, then rotated, and finally stacked together to form a lamination stack.

Abstract: A method and apparatus for manufacturing a lamina stack having laminas with a plurality of outer perimeter configurations. Each of the outer perimeter configurations has at least one common choke surface. The common choke surfaces form, when the laminas are stacked, a choke contacting surface on the outer perimeter surface of the lamina stack which extends continuously in the axial direction from the top lamina to the bottom lamina. The invention provides a method for manufacturing interlocked lamina stacks using a selectively actuated punches in a die assembly to stamp laminas with a plurality of outer perimeter configurations and to stack the laminas in a choke barrel with an alignment surface which cooperates with the common choke surface and securely holds the stamped laminas in position while the stack is being formed. Rotation of the choke barrel compensates for strip thickness variations.

Abstract: A motor stator delaminator separates individual electrical laminations from a stack thereof. A stack is transferred from an infeed conveyor at a loading station onto an elevator. The elevator raises the stack inside a tower to a holding station. At the holding station, support for the stack is transferred from the elevator to a holding mechanism. The elevator descends to the loading station. A breaker plate extends into the interior of the tower between the holding station and the loading station. The stack is released by the holding mechanism to fall by gravity onto the breaker plate. That action separates the individual laminations. A door opens a discharge opening in the tower, and an eject mechanism pushes the individual laminations through the discharge opening and out of the tower.

Abstract: An apparatus and method for manufacturing laminated parts from a plurality of laminas, in which the laminas for forming the laminated parts are blanked from strip stock material. The laminas and are then cut and stacked to form the laminated part. The apparatus includes a measuring device, such as a linear variable differential transducer, for measuring the thickness of successive sections of the strip stock at a first location of each section. The measuring device also measures the thickness of the strip stock sections at a second location of each section. A controller, such as a computer or a programmable logic controller, receives the thickness values at the first location and second location of the strip stock sections from the measuring device and computes a value of a difference therebetween. The controller also computes a running sum of the difference values for the strip stock sections and compares the difference values sum to a predetermined value.

Abstract: A body 12 of a chip-type transformer includes two magnetic plates 14, 30 and insulating sheets 16, 20, 24, and 28. Ring-shaped patterned electrodes 18, 22 and 26 are formed on the insulating sheets 16, 20 and 24. The ends 18a and 18b of the patterned electrode 18 and the ends 26a and 26b of the patterned electrode 26 are led out to the same side of the insulating sheets 16 and 24. The ends 22a and 22b of the patterned electrode 22 are led out to the opposite side of the insulating sheets. The magnetic plates 14, 30 and the insulating sheets 16, 20, 24 and 28 are laminated, and external electrodes connected to the patterned electrodes are formed. The ends 18b and 26a of the patterned electrodes are connected by the external electrodes.

Abstract: A laminated stack having a lamina layer comprised of a plurality of discrete lamina segments and which may also have laminas which define a plurality of outer perimeter configurations. The invention provides a method and apparatus for manufacturing such stacks. Lamina layers comprising a plurality of discrete lamina segments are automatically stacked by positioning the uppermost lamina in a choke barrel near the lower die bed surface and engaging the interlock tabs of the discrete lamina segments with the interlock slots of an uppermost lamina layer in the choke barrel prior to the complete separation of the discrete lamina segments from the remaining portion of the strip stock material. Each of the outer perimeter configurations has at least one common choke surface. The common choke surfaces form, when the laminas are stacked, a choke contacting surface on the outer perimeter surface of the lamina stack which extends continuously in the axial direction from the top lamina to the bottom lamina.

Abstract: Static magnet pole tips for a MRI system in which the static magnet pole tips are cut from a slug of spirally wound ferromagnetic material. The static magnet pole tips are cut from the spirally wound slug such that the static magnet pole tips have no or few semi-closed loops of ferromagnetic material. The static magnet pole tips can be used individually, or can be stacked for strength and symmetry.

Abstract: An electric motor is suitable for use in, for example, a home appliance, such as a refrigerator/freezer, to drive a fan blade. The electric motor includes a permanent magnet rotor and an excited two part laminated stator. The two parts of the stator are adapted to be connected together about the rotor with the axis of the rotor in the plane of the laminations. The rotor has two axially separated pole regions and the stator is configured to provide a separate rotor receiving pole pair for each rotor pole region. Each stator pole pair provides a rotor receiving space within which respective rotor pole regions are disposed, wherein the stator is made up of separate laminations of ferromagnetic material and adjacent laminations are displaced relative to each other in the plane of the laminations in directions perpendicular to the rotor axis such that the stator poles are each formed by a pair of semi-circular shaped poles to provide the rotor receiving spaces.

Abstract: An inner core for an ignition coil is inserted into a bobbin, around which a primary winding and a secondary winding are disposed. An outer core is inserted into a housing to form a magnetic circuit with the inner core. A magnet member, which is made of a permanent magnet material such as Sm.sub.1 Co.sub.5, is connected to the inner core. The bobbin, which is assembled with the inner core, the magnet member, the primary and secondary windings, is inserted into the housing, with the magnet member positioned between the inner core and the outer core, and then the inside of the housing is molded by a synthetic resin. Thereafter, the magnet member is magnetized to provide a predetermined magnetic force. The magnet member may be molded by Sm.sub.1 Co.sub.5 to form a plate having a thickness of 1.5 mm and more.

Abstract: A method of forming a multipole magnet wherein two backing sheets of paper or film material are screen or stencil printed with an ink containing magnetic particles and a carrier material to provide respective complementary patterned areas thereon, the patterned areas of ink are cured or dried, the respective ink patterns are magnetized using a magnetic field perpendicular to a plane of the backing sheets, and the sheets are combined into a laminate wherein the patterned areas are located between the two sheets.

Abstract: An inductor for inductively heating bearing surfaces of a crankshaft is machined from a block of copper to provide parallel, closely spaced and integrally joined inductor block portions having machined coolant passages therein. The machined inductor is rigidly supported between juxtaposed side plates having portions of the inner surfaces thereof machined to provide recesses which receive the inductor and in which the inductor is clampingly engaged between the plates. Positioning fingers are supported by the side plates to accurately position the active face of the inductor relative to a bearing surface to be heated, and tubular leads extend upwardly between the side plates for connecting the inductor across a source of power. An inlet conduit for coolant extends laterally between the side plates, and the tubular leads provide outlets for coolant flow from the inductor.

Abstract: A magnetically annealed amorphous metal motor stator is manufactured by magnetically annealing individually the stator yoke and stator teeth and then assembling the components to form a stator so that the field is radial in the teeth and varies or is circumferential in the yoke.

Abstract: Fast and economic process to prepare, without waste, E-I or U-I shaped transformer cores consisting of laminations (1, 2-9,10) that are directly stacked during blanking and are permanently jointed by punched zones (5,5'). Each free end of the E (1) or U (9) shaped laminations has a profile, snap-joint matching the profile (4,4') of the lamination in front of it (2,2) so as to permit their rigid fixing. The laminations are obtained from a steel strip (11) using a discontinuous feed cutting machine from one processing station to the next.

Abstract: Two parts of magnetic layers are placed so as to clamp a coil forming unit consisting of an alternated laminate of non-magnetic layers and electrode layers. The coil forming unit is surrounded by the magnetic body to form a closed magnetic circuit. When manufacturing the laminated transformer, a plurality of sets of U-shaped electrodes are deposited on non-magnetic green sheets. Then, the non-magnetic green sheets are laminated to form the coil forming unit consisting of the alternated laminate of the non-magnetic layers and the electrode layers. Magnetic green sheets are laminated thereto and clamp the non-magnetic green sheets therebetween to form a laminate. The laminate is pressed and additional magnetic body portions are formed in the center and on the side faces of the coil forming units. The laminate is pressed and cut into green elements. The green elements are sintered into monolithic bodies of the laminated transformer.

Abstract: A method and apparatus for manufacturing laminated rotor cores in which lamina thickness variations are compensated for without disturbing the relative alignment of lamina shaft holes throughout the rotor core. The rotor core includes several truing laminas which are rotated to compensate for the lamina thickness variations and which include a central opening larger than the lamina shaft holes. The enlarged central opening in the truing laminas prevents overlap between the central opening and the shaft holes after rotation in spite of a lack of concentricity of the lamina shaft holes and central openings with respect to the laminas.

Abstract: A controlled adjustable method for forming and stacking laminations that are used in an electro-magnetic device such as a motor or transformer is disclosed. The method steps provide the incremental forming of a predetermined number of laminations from magnetically conductive material with each lamination having at least one coil winding segment of predetermined incrementally varying width. Each coil winding segment is formed by the movement of variable electrically adjustable mechanical forming elements such as punching or stamping dies or laser devices relative to magnetically conductive material.

Abstract: A magnetic core obtained by laminating or winding a magnetic material ribbon and an electrical insulating material wherein the magnetic core has the relationship of 0.5 a.ltoreq.b<a in which the width of the magnetic material ribbon is "a", and the width of the electrical insulating material is "b".

Abstract: A tandem press system for the high speed manufacture of rotor cores and stator cores of electric motors. The tandem press system includes a rotor press and a stator press arranged in series for stamping out laminations from a web of stock material and pre-assembling them into rotor cores and stator cores, respectively. Structure is provided between the rotor and stator press to maintain control of the web and provide a substantial barrier to transmission of vibrations in the web to the stator press. The rotor and stator presses are capable of shifting from stamping one type of lamination to stamping another type of lamination without any interruption in the operation of the presses.

Abstract: An easy to assemble transformer for use in an electronics module of an electric vehicle. The transformer can be assembled from the "top down," thus alleviating the need to build the transformer as a subassembly unit. During manufacture of the transformer, windings are wound onto a thermally conductive coil form. Next upper and lower E-shaped core members are inserted into openings in the top and bottom of the form so that the side legs and the center legs of the E's touch and are in alignment. The thermally conductive coil form has a portion that touches a cold plate when the transformer is mounted on the cold plate. The transformer is further secured to the cold plate by a mounting bracket.

Abstract: A method for manufacturing a laminate comprising at least two sheets of magnetic material is disclosed. The laminate may be used to form a stacked transformer core. The method increases the productivity of the core-stacking process, decreases the core loss destruction factor, decreases total core loss, decreases acoustic noise generated by the electrical device employing the laminate, and does all of this in a manner which is commercially practical. The method comprises applying an adhesive, preferably a hot melt adhesive, in a pattern of thin beads onto one side of a first lamina or sheet of magnetic material, the pattern comprising a plurality of lines, the lines being substantially parallel to each other and substantially perpendicular to a direction of grain orientation or rolling direction of the lamina. A second lamina is then stacked onto the one side of the first lamina, and then a compressive force is applied to specified areas of the laminate.

Abstract: A method and apparatus for forming and stacking laminations that are used in an electro-magnetic device such as a motor or transformer is disclosed. The method steps and apparatus used provides the incremental forming of a predetermined number of laminations from magnetically conductive material with each lamination having at least one coil winding segment of predetermined incrementally varying width. Each coil winding segment is formed by the movement of forming elements such as punching or stamping dies or laser devices and the magnetically conductive material relative to one another.

Abstract: An iron core of a multi-phase linear motor which is not restricted by the shape of the motor is manufactured. A stator 1 and a mover 2 are disposed opposite to each other and are separated by an air gap. In manufacturing of the iron core of the multi-phase linear motor having a multiplicity of teeth 16 formed on surfaces of a plurality of salient poles P1, P2, . . . disposed in the stator 1 or the motor 2, the stator iron core 10 or mover iron cores 22a and 22b are formed by punching iron plates 30a, 30b, . . . forming the iron core by a punching mold 31 while selectively controlling actuation and withdrawal of movable punches 33 included in the punching mold 31 and disposed so as to be actuable and withdrawable toward and away from the salient poles so that the tips of the salient poles P1, P2, . . . form tooth tops 16a or tooth bottoms 16b of the teeth 16 at a predetermined period for each punching of the iron plates and by laminating the punched iron plates successively.

Abstract: A method for making an electric motor stator. An annular disk is cut so as to create a radially-outer ring portion having slots and a radially-inner ring portion having spokes engaged with the slots. This step is repeated on additional disks. Then, the radially-outer ring portions are stacked together to form the stator outer shell, and the radially-inner ring portions are stacked together to form a multi-pole assembly with the aligned spokes forming the poles. Coils are wound around plastic sleeves which are each brought to, and placed over, a corresponding pole member. Then, the multi-pole assembly is positioned within the stator outer shell with the pole members engaging the aligned slots. Finally, the joined-together radially-inner ends of the spokes are cut to create narrow slits.

Abstract: A distribution transformer has a wound magnetic core (50) of overall circular shape and rectangular cross-section with between two and four overall rectangular shape electric coils (20,30) extending through the core window. The coils (20,30) are pre-formed and assembled so that their parts (20A,30A) which meet form a circular section solid cylinder. A mandrel (40) is then located around this cylinder (20A,30A) and continuous non-amorphous steel strip is wound thereon to form an unannealed, uncut wound magnetic core of axial length in the range 250 mm to 1 m. In a modification, amorphous steel strip is first wound on to another mandrel, annealed, and then transferred from the other mandrel on to the mandrel around the coils.

Abstract: This method employs a rotatable mandrel having a circular outer peripheral portion comprising a section that is removably held in place within the peripheral portion and has an arcuate outer surface forming a part of said circular outer peripheral portion. As the mandrel is rotated, there is formed about the circular outer peripheral portion a toroidal core form that comprises laminations of amorphous steel strip having ends that meet in a joint region that extends angularly about a restricted zone of the toroidal core form. This forming step is so controlled that said restricted zone angularly aligns with the removable section of the mandrel. After the core-forming step, the removable section is removed from the mandrel thereby exposing an inner peripheral portion of the toroidal core form that angularly aligns with said restricted zone.

Abstract: An amorphous core/coil assembling apparatus which prevents or minimizes damage to an amorphous core of an amorphous material upon insertion of the amorphous core into a pair of coils and which is high in reliability and superior in operability. An amorphous core of an inverted U-shape is first fixed at a predetermined position, and then a coil receiving table on which a pair of coils are placed is guided to a position at which end portions of the legs of the U-shape of the amorphous core are positioned in the proximity of a pair of V-shaped openable and closeable guide caps, whereafter the guide caps are removed from the end portions of the legs of the amorphous core.

Abstract: In a method for the automatic forming of packs of trimmed metal sheets for armatures of electrical machinery or the like, the pack (P') is formed by the controlled drop of a sheet stack (P) housed in a tubular magazine (1) open at the bottom. The pack is dropped against an underlying collection bottom (2) which is brought to a predefined distance from the lower end of the magazine (1). A tightening clamp (3,4) at the lower end of the magazine (1) blocks the stack (P) against a further gravity drop after its descent against the collection bottom (2). A subsequent first lowering of the bottom (2) to separate the pack (P') from the overlying stack, by virtue of a detachment device (22, 122), is followed by a detachment from the lower sheet (L') of the stack (P) of a possible sheet (L) which is mistakenly and temporarily held against the lower sheet (L') of the stack (P) but belongs to the overlying pack (P').

Abstract: This method of making packets of amorphous metal strip adapted to be wrapped about the arbor of a transformer-core-making machine comprises providing first and second composite strips, each comprising many thin layers of amorphous metal strip stacked in superposed relationship. The composite strips have leading ends that are located in initial positions (i) axially spaced from each other at the start of a packet-making operation and (ii) at opposite ends of a stacking zone where the packets are built up during a packet-making operation. The composite strips are cut to detach first sections of strip from the first composite strip and to detach second sections of strip from the second composite strip; and the detached sections are axially advanced forwardly of the respective composite strips from which they are detached into said stacking zone. The second sections are stacked in alternating relationship upon the first sections in the stacking zone.

Abstract: A superconducting magnetic coil includes a plurality of sections positioned axially along the longitudinal axis of the coil, each section being formed of an anisotropic high temperature superconductor material wound about a longitudinal axis of the coil and having an associated critical current value that is dependent on the orientation of the magnetic field of the coil. The cross section of the superconductor, or the type of superconductor material, at sections along the axial and radial axes of the coil are changed to provide an increased critical current at those regions where the magnetic field is oriented more perpendicularly to the conductor plane, to thereby increase the critical current at these regions and to maintain an overall higher critical current of the coil.

Abstract: An improved magnetic sensor for use in measuring the position, velocity and/or direction of movement of an object having alternating zones of different magnetic conductivity in the direction of movement, comprises a permanent magnet member having a pole face facing the moving object and having an axis transverse to the direction of movement thereof. A pair of sensor elements are mounted on the permanent magnet pole face, one on each of the opposite sides of the magnet axis in the direction of movement of the object. A laminated flux bar having strips of ferromagnetic material of high permeability and strips of ceramic material having low permeability is mounted on the pair of sensor elements.

Abstract: Plane sheets which have the same shape as the magnetic circuit and are relatively movable along their contact surface are arranged in a stack. The stack is grasped and part of the circuit is bent out of alignment with the plane of the sheets to enable a coil to be placed on a portion of the circuit which is next to the air gap, whereafter said part is bent back into alignment with said sheets.