Brake magnet for watt-hour meters

In a brake manget for watt-hour meters with brake magnet systems of anisotropical, sintered or plastic bonded permanent magnet material of low permeability of nearly one and high coercive field strength, e.g. barium-ferrite, arranged on both sides of the meter braking disc on an essentially U-shaped carrier body of non-magnetic material, spaced by an air gap, each brake magnet system being comprised of two right-angled permanent magnet bodies magnetized in counter direction, parallel to the plane of the meter braking disc, and provided on both pole faces with elements of good magnetic conductivity, producing alternating polarity at their poles, whereby the flux via the said elements of good conductivity close with the opposite pole of counter polarity through the air gap and meter braking disc therein, the improvement which comprises:

• the systems being provided with temperature compensation elements of a material with temperature related permeability, wherein said temperature compensation elements are arranged only on the portions of the magnet system surfaces which are substantially spaced from the air gap.