Abstract: A plurality of phase insulators are inserted in the cavities of the stator of a dynamo-electric machine by means of an insertion device which includes a plurality of guide blades displaced circumferentially around a central axis and an insertion member slidable between the series of guide blades and having a circumferential series of axial grooves in its outer surface in which the various blades are engaged. The insertion member is disposed initially in a rest position in which it allows a phase insulator to be positioned above the guide blades, after which it is moved to an operative position so as to cause the phase insulators to slide along the guide blades and to be inserted in the cavities of the stator.

Abstract: In a coil winder for forming the winding of a dynamo-electric machine, the change-over of the form on which coils of the winding are wound is effected automatically. A rotatable platform is located beneath the form and is movable in the direction of its axis of rotation between a position close to the form and a position spaced herefrom. The platform has an empty bearing zone for the form intended to be removed from the coil winder and a support zone occupied by the replacement form. When it is wished to replace the form, the rotatable platform is arranged in its close position with the empty zone beneath the form to be removed and the latter is deposited on it by the deactivation of the rapid-attachment connection which connect the form to the coil winder.

Abstract: In a device for inserting prewound coils in the cavities of a stator of a dynamo-electric machine, of the type comprising an annular series of coil guide blades for receiving the prewound coils to be inserted in the cavities of the stator, an annular series of key guide blades surrounding the series of coil guide blades, and a thrust member slidable axially into the series of coil guide blades to insert the coils in the stator cavities, there are also provided an outer auxiliary coil guide member having an annular body locatable around the key guide blades and having an inner surface spaced from the outer surface of the key guide blades so as to define a first annular passage for guiding the coils during the insertion operation, and an inner auxiliary coil guide member movable with the thrust member into the series of coil guide blades and having an outer surface spaced from the inner surface of the coil guide blades so as to define a second annular passage for guiding the coils during the insertion operation

Abstract: A device usable in the manufacture of stators for dynamo-electric machines for fixing end portions of the coils of a stator to a support member carried by the stator comprises means for disposing the end portions of the stator coils in directions parallel to a plane substantially perpendicular to the axis of a stator and facing an end surface of the stator so as to make the end portions project outwardly from the stator, means for moving the end portions in the plane substantiallyperpendicular to the axis of the stator until they are brought into a zone of the end surface of the stator in which the support member is disposed, and means for thrusting the end portions downwardly to fit them into corresponding grooves provided in the support member.

Abstract: A device for inserting pre-wound coils into electric motors, the device having an annular series of coil-guide bars for receiving pre-wound coils for insertion into the slots of the stator, an annular series of key-guide bars surrounding the coil-guide bars and terminating a short distance beyond the free ends of the coil-guide bars, so as to permit the stator to bear on the free ends of the key-guide bars and surround the coil-guide bars with the pole faces of the stator in engagement with the external faces of the coil-guide bars. The device also has a pusher member slidable through the series of coil-guide bars to insert the coils in the stator slots. Each coil-guide bar engages the stator only in correspondence with the respective pole face and correct angular positioning of the stator with respect to the two series of bars is effected by orienting means, such as terminal projections on the key-guide bars, engageable with the sides of the stator slots.

Abstract: Apparatus for forming stator coils constituted by multi-lobed turns, for dynamo-electric machines, comprises a first circumferential series of forming elements located at equal distances from a central axis and equiangularly spaced from each other, and a second circumferential series of forming elements equiangularly located about the said central axis and intercalated between the forming elements of the first series. The forming elements of the second series are moveable radially relative to the said central axis between an outer position which is spaced from the central axis by a distance greater than the distance between the central axis and the forming elements of the first series, and an inner position which is spaced from the central axis by a distance less than the distance between the central axis and the elements of the first series.

Abstract: A method and a device for forming the rotor winding coils of a dynamoelectric machine and for anchoring the ends of the coils in slots provided in a commutator associated with the rotor. The method comprises the steps of winding a copper wire around pairs of rotor slots to form the various coils of the winding, inserting each coil end in a commutator slot, the starting end of each coil being inserted in the same slot as that in which the end of the previously wound coil is inserted, and bending the portion of copper wire that is adjacent the end of the coil and extends between the rotor and the commutator, towards the rotor shaft immediately before the insertion of each coil end in the corresponding commutator slot. The said step of insertion of each coil end in the corresponding commutator slot and the preceding step of bending the portion of copper wire adjacent the end of the coil towards the rotor shaft, are carried out during the winding of the wire in the rotor slots.

Abstract: A device of the known type comprising an annular series of coil-guide blades intended to receive pre-wound coils to be inserted into stator slots, an annular series of wedge-guide blades surrounding the series of coil-guide blades and terminating a short distance before the free ends of the coil-guide blades in such a way as to allow the stator to rest on the free ends of the wedge-guide blades by disposing it about the coil-guide blades and a thrust member which is slidable through the series of coil-guide blades for inserting the coils into the stator slots. The wedge-guide blades are axially displaceable in the direction opposite their free ends, against the action of resilient means. Due to this characteristic, when the stator is pressed on the free ends of the wedge-guide blades and fixed in position for the insertion of the coils, the said free ends of the wedge-guide blades are automatically disposed at a distance from the free ends of the coil guide blades corresponding to the length of the stator.

Abstract: A device for placing prewound coils into stator slots comprises an annular series of fingers housed in respective longitudinal grooves of the outer surface of a hollow cylindrical finger holder. The fingers project beyond one end of the holder for placement thereon of prewound coils. A stripper member axially movable through the stator is provided on its periphery with a series of longitudinal grooves in which the portion of each finger which projects beyond the holder is received. Some fingers, and preferably at least one or both fingers of each couple of adjacent fingers between which a prewound coil is interposed is slidably mounted both within said stripper member and within said holder.

Abstract: The invention relates to a method for the insertion of pre-wound coils into the slots of a stator of a rotary electric machine. The device comprises a cylindrical finger holder having on its periphery an annular series of longitudinal grooves, housing a series of fingers which extend beyond one end of the finger holder to receive the pre-wound coils. At the other end of the cylindrical finger holder opposite that from which the fingers extend is an end portion which is insertable into a stator and is provided with reference means for determining the correct angular orientation of the finger holder and the fingers with respect to the stator slots when the said other end portion of the finger holder is inserted into the interior of a stator.

Abstract: A device for placing prewound coils into stator slots comprises an annular series of fingers housed in respective longitudinal grooves of the outer surface of a hollow cylindrical finger holder. The fingers project beyond one end of the holder for placement thereon of prewound coils. A stripper member axially movable through the stator is provided on its periphery with a series of longitudinal grooves wherein the portion of each finger which projects beyond the holder is received. Some fingers, and preferably at least one finger of each couple of adjacent fingers between which a prewound coil is interposed is slidably mounted both within said stripper member and within said holder.

Abstract: The invention relates to a device and a method for the insertion of pre-wound coils into the slots of a stator of a rotary electric machine. The device comprises a cylindrical finger holder having on its periphery an annular series of longitudinal grooves, housing a series of fingers which extend beyond one end of the finger holder to receive the pre-wound coils. At the other end of the cylindrical finger holder opposite that from which the fingers extend is an end portion which is insertable into a stator and is provided with reference means for determining the correct angular orientation of the finger holder and the fingers with respect to the stator slots when the said other end portion of the finger holder is inserted into the interior of a stator.