H - Electricity – 01 – F
Patent
H - Electricity
01
F
336/23
H01F 27/38 (2006.01) F42C 17/04 (2006.01) G06K 7/08 (2006.01) H01F 27/30 (2006.01) H01F 27/40 (2006.01) H01F 38/14 (2006.01)
Patent
CA 1077584
ABSTRACT OF THE DISCLOSURE: An arrangement for transmitting information by magnetic induction comprises at least two windings, each of toric shape and of different diameters. A first one of the windings is capable of producing an alternating magnetic field and a second one of picking up this field. The first winding is adapted to be placed in a position surrounding the second winding and coplanar therewith. Each winding is disposed in a housing of non-magnetic non-conduc- tive material, the two windings being seperable from one another, wherein the arrangement includes a ring of non ferro-magnetic metal disposed substantially coaxially between the two windings when the first winding is in the position surrounding the second winding. The ring is embedded in one of the housings; it provides a short circuit loop and produces a secondary magnetic field which causes a deflection of the magnetic lines of the primary field toward the axis of the ring to produce a concentration of the magnetic field in the inner portion of the second winding, thereby reducing magnetic losses.
256551
Beuchat Roger
Mefina S.a.
LandOfFree
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