Alcatel N.v.

Hans P Meyer

Helmut Becker

Bernhard F Nitschke

Wieland A Bartel

In a magnetic field sensor comprising at least one magnetic-field-dependent resistor disposed in the vicinity of an outer side of a housing that is open on at least one side and further comprising a permanent magnet that is adjacent to said magnetic-field-dependent resistor, the magnetic-field-dependent resistor(s) (6), arranged on a support (4), are in a contacting relationship with the inside of a detector side wall (2) of the housing (1), and the thickness (x) of said detector side wall (2) is, at least in the area of the active surface of the magnetic-field-dependent resistors (6), smaller than that of the other housing walls (17, 18, 19) and/or the housing base (20). A rugged, high-resolution magnetic field sensor is thus obtained.

Magnetic field sensor with magnetic field-dependent resistor

A magnetic field detector has a sensor arrangement which is disposed in a housing and includes a plurality of stripe-magnetic-field-dependent resistors arranged on the underside of a dielectric support. A permanent magnet is oriented perpendicularly to the upper side of the support and to the magnetic-field-dependent resistors. In one embodiment, the sensor arrangement is located approximately in the center of the housing and a plurality of electrical contact means are attached on both sides of the permanent magnet and adjacent thereto within the housing. In another embodiment, the sensor arrangement is located laterally from the center of the housing and the electrical contact means are attached within the housing and adjacent to only one side of the magnet. The electrical contact means have internal terminals which are connected by small wire conductors to the magnetic-field-dependent resistors, and external terminals are formed into solder contacts or plug contacts which are adapted to engage a mating connector.

Mounting arrangement for magnetic field detector

A relay housing comprising a cover plate which is inserted in a step-shaped recess of a housing rim. The rim portion of the plate has a reduced thickness so that there is formed a rim channel between the plate and the housing rim. The channel is in communication with fill-in cavities in the cover plate through which the channel is filled with a self-hardening or curable material. The fill-in cavities are formed as flat recesses adjoining the rim channel with wide openings, not connected among each other, that are at least twice as large as the width of the rim channel. The bottom of the channel slopes downwardly from said openings. This arrangement permits a quick sealing by use of only small amounts of sealing compound.

Growing community of inventors

Nuremberg, Germany

Hans P Meyer