Abstract: The invention relates to a position and/or speed sensor including a mobile target (2) with at least one tooth, a first permanent magnet (5), at least one second permanent magnet (11), and a probe (4) sensitive to the direction and intensity of a magnetic induction, and placed along an axis OZ such that when there is no adjacent tooth, the magnetic induction created by the first magnet passes through the probe along a direction opposite to the direction of magnetization. Magnetic inductions created by the permanent magnets (5, 11) have approximately equal values but in opposite directions, and in the presence of an adjacent tooth, the absolute value of the variation of the magnetic induction detected by the probe (4) is greater than a trip threshold.

Abstract: The disclosure concerns an encoder for a position sensor, the encoder having a multipole magnetic ring provided on its circumference with alternating north poles and south poles for traveling past a measurement cell that delivers a periodic signal corresponding to variation in the intensity of the magnetic field delivered by the poles.

Abstract: The invention relates to a position and/or speed sensor comprising:

Abstract: An ignition unit for at least two sparkplugs of an internal combustion engine, the unit being in the form of a box having therein a reception cavity receiving an electronic printed circuit, a plurality of mutually separate housings extending side by side transversely relative to the reception cavity, a separating partition disposed between the reception cavity and the housings which defines a through opening between each of the housings and the reception cavity, and a plurality of ignition coils, each mounted in a corresponding one of the housings. Each ignition coil is fitted with a primary connector including 1) a fixing member for fixing the ignition coil to the box to enable the ignition coil to be mounted in a corresponding one of the housings, and 2) connection terminals between the ignition coil and the printed circuit.

Abstract: A sensor for detecting the angular position of a rotary drive shaft is disclosed which includes a stator, a rotor connected to the stator by a ball joint and including a moving target, and a drive shaft connected to the rotor. The moving target passes through a detection system and produces a signal as a function of its position. Variations in the sensor output signal due to misalignment of the rotor and the drive shaft are minimized by locating the moving target close to the axis of rotation of the ball joint.

Abstract: As a component belonging to a class of components having hysteresis cycles of similar characteristics, the component of the invention subjects group of probes, in the absence of field-disturbing members situated in relationship with the probes, to a determined induction field so that a "bias" induction difference (B.sub.O) appears between the two groups, which difference is not less than the value of the high switchover threshold (B.sub.H), or not greater than the value of the low switchover threshold (B.sub.B), or else lies between the switchover thresholds (B.sub.H and B.sub.B), thereby obtaining a signal in a determined logic state at the output from the hysteresis level comparator in spite of induction difference dispersions lying between the minimum value of the low threshold (B.sub.Bmin) and the maximum value of the high threshold (B.sub.Hmax). The invention is applicable to differential detection Hall effect sensors.

Abstract: An integrated ignition-transformer assembly for the cylinder of a heat engine having controlled ignition, the assembly being of the type comprising a tubular body (11) delimiting: an internal shoulder (12), mounting means (13) on one side of said shoulder for mounting on the stem of a spark plug (15), and a housing (14) on the other side of said shoulder containing an axially fixed transformer coil (24) which is encapsulated in a dielectric coating (25) and which includes a terminal (30) for making contact with the spark plug; said mounting means (13) being constituted by disconnectably fixing means for co-operating with a complementary thread provided on the base (17) of an adopted spark plug; and said terminal (30) being in contact with the terminal pin (35) of a spark plug and being surrounded by an internal sleeve (32) of dielectric material which extends said transformer coil (24) to said shoulder (12), and which is intended to receive, in sealed manner, the stem (16) of the spark plug on which the assem

Abstract: An electromagnetic pickup includes an insulating body that mounts a coil of wire surrounding a spool portion at one end of the body. A magnetic element is disposed within an axial passage through the body, including its spool portion. A sleeve-like molded plastic cover surrounds the spool portion and other portions of the body, and an encapsulation occupies the spaces within the cover that are not occupied by the body and elements mounted thereto. One end of the magnetic element extends to one end of the body and abuts the inner surface of the wall that encloses one end of the cover. The other end of the body is provided with a self-centering flange that engages the inner surface of the cover, and the other end of the cover is provided with the flange that is embedded in the encapsulation that also forms a seat external of the cover.

Abstract: The present invention relates to a bent terminal for electrical connection, which comprises an arm for crimping, an arm for connection and a joining portion defining an envelope of general toric form; this toric portion may be constituted by a semi-toric half-shell and by a complementary portion, affixed or connected thereto, cooperating with said half-shell to constitute the envelope. The invention is more particularly applicable to ignition wiring systems in internal combustion engines with controlled ignition.