Abstract: A monophase transverse circuit has two rows of cylindrical air gaps which are provided with conductors between terminal pairs, the terminal pairs are rotated at a quarter turn in order, a coil in the form of a flat double U-shaped arch remains global having consequent terminals by defining meanders between terminals which are laterally introducing opposite to a meander and whose sheets are now progressively attacked on one row of cylindrical or flat air gaps, thereby balancing axial forces, axial and opposite currents between adjacent slots convert a preceding ring-shaped flux into radial fluxes in the terminals by acting upon the rotor terminals with the same pitch and polarized by induction.

Abstract: A monophase transverse circuit has two rows of cylindrical air gaps which are provided with conductors between terminal pairs of a machine of an EP 1 063 754 type. By anamorphic transformation according to figures, the terminal pairs are rotated at a quarter turn in order to come to FIG. 3d. A coil in the form of a flat double U-shaped arch remains global but having consequent terminals by defining meanders between terminals which are laterally introducible opposite to a meander and whose sheets are now progressively attacked on one row of cylindrical or flat air gaps, thereby balancing axial forces. Axial and opposite currents between adjacent slots convert a preceding ring-shaped flux into radial fluxes in the terminals by acting upon the rotor terminals with the same pitch and polarised by permanent magnets or/and winding or/and induction according to FR 2 852 166.

Abstract: A variable-reluctance rotating dynamoelectric machine is provided with, for each single-phase structure A, B, and C, two rows of airgaps 5-27, 6-28 having the same radius Re connected to each other by means of angular sectors, one of which surrounds stator conductors 8 in the shape of a torus. The sectors are arches 9, 22 each constituted by a stack of strips of sheet metal which are bent along axes X perpendicular to the axis of rotation Z. A pair of arches 9, 22 is formed by cutting a wound and bonded ring of thin magnetic sheet having oriented grains. Cutting by wire-type spark erosion results in the formation of several pairs of teeth per arch. A rotor winding in the shape of a torus or a rotor permanent magnet can complete the machine. The machine is applicable to reluctance motors for vehicle traction, which can also recharge a storage battery.

Abstract: A magnetic core (3) surrounded by a coil (1, 2) bears a first pole shoe (4) forming a large-surface air-gap with two zones (5a, 6a) of two armatures (5, 6) fixed to one another and disposed magnetically in parallel.The core (3) is continued beyond the coil and at this end bears a second pole shoe (9) which together with two other zones (5c, 6c) of the armatures forms a second large-surface air-gap disposed magnetically in series with the first.

Abstract: A three-state polarized electromagnet comprises a stationary system (1) surrounded by a coil (5) and a moving system (7). Each system consists of a permanent magnet (2; 14) fitted with pole pieces (3, 4; 12, 13). The ends of the pole pieces are bent-back towards each other in order to define four air-gaps (E1 to E4) for permitting displacement of the moving system (7) between two end positions. One end portion of a pole piece forms part of only one air-gap and the air-gap faces are joined to pole faces of permanent magnets having the same polarity in order to reduce to zero the fluxes within the air-gaps which are closed when no excitation is applied and in order to permit a return to a stable central position.

Abstract: The electromagnet comprises the yokes (31, 32a) which are moveable in relation to an armature (21a) and a winding (25) surrounding a part of the magnetic circuit, this armature (21a) comprised of a magnet (22a) fitted with two pole pieces (23a, 24a) projecting past both extremities of this magnet, at least one of the said pole pieces having its extremities bent at right angles in order to define the air gap inducing counter forces following a direction perpendicular to the axis of the permanent magnet (22a).A second armature (21b) identical to the first (21a) is located parallel to and facing the first. Two yokes (31; 32a, 32b) join the air gap zones of the two armatures located facing each other in such a way that the magnetic circuit constitutes a sequence of armature and yoke forming a rectangle. Two windings (25, 28) are located on opposite sides of the above-mentioned rectangle.Application primarily in the construction of electromagnets of low inertia, small volume and low leakage flux.

Abstract: A monostable polarized relay which has two permanent magnets and does not require any resilient restoring force is reduced to a minimum overall size while permitting a high current-carrying capacity of the relay contact. To this end, a flexible contact-strip is subdivided into two sinuous branches which extend in two different regions of the available space within the relay housing. The contact-carrying end of the strip is inserted in an actuating fork which is rigidly fixed to the moving armature and the other end of the strip is anchored to the base of the relay.

Abstract: The rotating or linear stepping motor comprises a permanent magnet equipped with pole pieces the ends of which define gaps.This motor comprises a second permanent magnet so that its primary has a magnet (6) equipped with pole pieces (4) and (7) and its secondary has a magnet (9) equipped with pole pieces (5) and (10). Each magnet (6), (9) is subjected to the field of a winding (2) which is perpendicular to the direction of its magnetization and directed towards one or the other of the ends of each pole piece so as to create a transfer of the flux of the magnets. In the case of a rotating motor, the winding (2) preferably has a toroidal shape with circular cross-section and the path of the flux around a circular section of winding also has an approximately circular shape so that each part of the winding (2) is surrounded by iron of minimum length. Each gap is flanked by two magnets and the residual holding torque is strengthened. This torque can be cancelled by a releasing pulse.

Abstract: The bistable electromagnet comprises a magnetic circuit partially surrounded by a winding constituted by a series of links (M1, M2, M3, M4, M5, M6) interconnected by air gaps, the links of a first type being movable relative to the other links of a second type, certain types of links comprising a permanent magnet (1, 3, 5, . . . ) provided on its pole surfaces with pole pieces (7, 8; 11, 12; 15, 16; . . . ) whose ends define two air gap zones with the neighboring links of the other type.

Abstract: At least one coil partly surrounds a magnetic circuit consisting of a fixed yoke and a movable armature, the armature being constituted by a permanent magnet having pole faces adapted to carry pole-pieces which project on each side of the axis of magnetization. The electromagnet comprises a second permanent magnet interposed within the fixed yoke with a polarity such that the armature is urged towards the end or so-called rest position when the coil is not energized.

Abstract: In a bistable electromagnetic relay composed of a U-shaped yoke provided with excitation coils, the arms of the yoke are inserted between the pole-pieces of a pivotally mounted H-shaped armature comprising a permanent magnet. A flexible strip attached to the armature carries two movable contacts which are applied against two stationary contacts in order to provide an electrical connection between the contacts. Only a very small proportion of the flexible strip performs a conducting function, there is no permanent connection between the strip and a fixed terminal, and a very short path is provided for current flow. The double-break action of the relay has the effect of reducing stray capacitance between open contacts.

Abstract: A magnetic flywheel for a manually-driven magneto megohmmeter with step variable voltage comprising a rotor formed by a ring of magnetic material carrying permanent magnets, and a stator, disposed inwardly of the rotor and formed by an assembly of magnetic circuits each having a C-shape with a coil wound around the central portion thereof and with two pole surfaces at the ends. In order to reduce the starting torque, the number of pairs of permanent magnets is one less than the number of magnetic circuits, and the angular distance between the pole surfaces of one magnetic circuit is equal to the angular distance between two adjacent permanent magnets. Also, the arc length of each pole surface of a magnetic circuit is substantially equal to half the angular distance between two adjacent permanent magnets.

Abstract: Electromagnetic relay comprising resilient U-shaped tongues having each a pair of arms resiliently engaging fixed contact studs for electrically interconnecting them, and a movable control member adapted to move one of the arms of each tongue away from the corresponding contact stud, for breaking the electric connection. This relay further comprises a second control member movable in a direction opposite to that of the first control member and adapted to co-operate with the first control member for clamping the U-shaped tongue and move the two arms thereof away from the relevant contact studs.

Abstract: A magnetic circuit comprising a fixed core, yokes having flat portions in parallel planes, and an armature comprising a permanent magnet provided with pole pieces having end portions projecting on either side of the magnet, a flat portion of a first one of said yokes penetrating into the space between two end portions of the pole pieces located on one side of the magnet axis, the air gap surfaces of said yokes and of said pole pieces extending normally to the magnet axis and, one the other side thereof, at least one projecting end portion of said pole pieces penetrating between two flat portions of second and third yokes carried by a same free end of the core. Such a magnetic circuit is suitable for monostable or bistable operation in relays, contactors or solenoid valves.