Transducer for vehicular service compensated for accelerator movements of the vehicle

Claim 1

An inductive transducer for converting into an electrical signal a mechanical displacement transmitted through a member (4a) responsive to the relative displacement of a body (4b) relative to the transducer while the transducer is subjected to acceleration forces tending to distort its conversion characteristic, said electrical signal depending in a predetermined manner upon said displacement, said transducer comprising a magnet winding on a core of ferromagnetic material having a plurality of legs extending away from the portion thereof on which said magnet winding is provided and a short-circuiting ring encircling at least one of said legs and linked to said member so that the inductance of said winding will vary with said displacement and comprising the improvement wherein: said magnet winding (1, 22, 34, 35) is so disposed on said core (3, 21, 30, 31) that the magnetic flux can extend in said core legs in two opposite directions on opposite sides of said magnet winding and is limited on one side of said magnet winding by the position of said short-circuiting ring (4, 23, 36) linked to said member (4a) and on the other side of said magnet winding by the position of a compensating short-circuiting ring (7, 24, 37), wherein also the displacement of said first-mentioned short-circuiting ring (4, 23, 36) and of said compensating short-circuiting ring (7, 24, 37) takes place in each case in opposition to a restoring force (10), and wherein the mass of said compensating ring is at least equal to that of said first-mentioned short-circuiting ring in order to balance out from the response of said transducer to said displacement the effect of said acceleration forces on at least said first-mentioned short-circuiting ring.