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A hinge plate includes a frame hinge plate part comprising a frame fastening part and a frame hinge part. A leaf/sash hinge plate part comprises a leaf/sash fastening part and a leaf/sash hinge part. A primary coil is disposed in the frame hinge part and a secondary coil is disposed in the leaf/sash

A hinge plate includes a frame hinge plate part comprising a frame fastening part and a frame hinge part. A leaf/sash hinge plate part comprises a leaf/sash fastening part and a leaf/sash hinge part. A primary coil is disposed in the frame hinge part and a secondary coil is disposed in the leaf/sash hinge part, each coil being configured to surround a hinge plate pin. The primary coil extends at least almost up to an end face of the frame hinge part facing the leaf/sash hinge part. The secondary coil extends at least almost up to an end face of the leaf/sash hinge part facing the frame hinge part. A hinge plate pin sleeve comprising a ferrite material is disposed between the hinge plate pin and the primary and secondary coils, and extends approximately over a length of the hinge plate pin surrounded by the primary and secondary coils.

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1. A hinge plate for connecting a leaf of a door or a sash of a window to a frame so as to be hinged about a hinge axis, the hinge plate comprising: a frame hinge plate part comprising a frame fastening part and a frame hinge part, the frame hinge plate part being configured to be fastened to the fr

1. A hinge plate for connecting a leaf of a door or a sash of a window to a frame so as to be hinged about a hinge axis, the hinge plate comprising: a frame hinge plate part comprising a frame fastening part and a frame hinge part, the frame hinge plate part being configured to be fastened to the frame;a leaf or sash hinge plate part comprising a leaf or sash fastening part and a leaf or sash hinge part, the leaf or sash hinge plate part being configured to be fastened to the leaf or to the sash;a primary coil disposed in the frame hinge part and a secondary coil disposed in the leaf or sash hinge part, the primary coil and the secondary coil each surrounding a hinge plate pin defining the hinge axis, the primary coil extending at least almost up to an end face of the frame hinge part facing the leaf or sash hinge part, and the secondary coil extending at least almost up to an end face of the leaf or sash hinge part facing the frame hinge part; anda hinge plate pin sleeve comprising a ferrite material, the hinge plate pin sleeve being disposed between the hinge plate pin and the primary coil and the secondary coil, the hinge plate pin sleeve extending approximately over an entire length of the hinge plate pin that is surrounded by the primary coil and the secondary coil. 2. The hinge plate as recited in claim 1, wherein the hinge plate pin sleeve comprises a ferrite sleeve. 3. The hinge plate as recited in claim 2, wherein the ferrite sleeve comprises a sintered material. 4. The hinge plate as recited in claim 1, wherein the hinge plate pin sleeve comprises an inner sliding layer forming an inner lateral surface of the hinge plate pin sleeve, the inner sliding layer the hinge plate pin sleeve lying against the hinge plate pin so as to be substantially free of play. 5. The hinge plate as recited in claim 4, wherein the inner sliding layer is formed by an inner hinge plate pin sliding sleeve comprising a plastics material with a sliding property. 6. The hinge plate as recited in claim 5, wherein the plastics material comprises particles of a ferromagnetic material. 7. The hinge plate as recited in claim 1, wherein the hinge plate pin sleeve comprises an outer sliding layer forming an outer lateral surface of the hinge plate pin sleeve. 8. The hinge plate as recited in claim 7, wherein the outer sliding layer is formed by an outer hinge plate pin sliding sleeve comprising a plastics material with a sliding property. 9. The hinge plate as recited in claim 8, wherein the plastics material comprises particles of a ferromagnetic material. 10. The hinge plate as recited in claim 8, wherein at least one of the primary coil and the secondary coil comprise a ferrite core having a sleeve shape. 11. The hinge plate as recited in claim 10, wherein the ferrite core comprises a sintered material. 12. The hinge plate as recited in claim 10, wherein the ferrite core comprises radially-protruding collars at each respective end of the ferrite core. 13. The hinge plate as recited in claim 12, further comprising a coil winding disposed between the radially-protruding collars of the ferrite core. 14. The hinge plate as recited in claim 10, wherein at least one of the primary coil and the secondary coil comprise an inner sliding coil sleeve forming an inner lateral surface of the ferrite core, an inside diameter of the inner sliding coil sleeve being adapted to an outside diameter of the outer hinge plate pin sliding sleeve so that the inner sliding coil sleeve and the outer hinge plate pin sliding sleeve interact at least substantially free of play. 15. The hinge plate as recited in claim 14, wherein the inner sliding coil sleeve comprises a plastics material. 16. The hinge plate as recited in claim 1, further comprising a hinge plate pin receptacle disposed in the frame hinge part or in the leaf or sash hinge part, and where at least one of the primary coil and the secondary coil comprise an outer coil sleeve forming an outer lateral surface of the respective primary coil and secondary coil, wherein an outside diameter of the outer coil sleeve is adapted to an inside diameter of the hinge plate pin receptacle so to prevent a relative movement between the primary coil and the secondary coil and the frame hinge part or the leaf or sash hinge part. 17. The hinge plate as recited in claim 16, wherein the outer coil sleeve comprises a plastics material. 18. The hinge plate as recited in claim 17, wherein the plastics material comprises particles of a ferromagnetic material having a sliding property. 19. The hinge plate as recited in claim 18, wherein at least one of the primary coil and the secondary coil has at least a singly wound coil winding comprising copper with a coil wire diameter of between 0.03 and 0.1 mm. 20. The hinge plate as recited in claim 19, wherein the coil wire diameter is between 0.05 and 0.07 mm. 21. The hinge plate as recited in claim 19, wherein at least one of the primary coil and the secondary coil has at least two wound coil windings.