| 摘要 |
An electromagnetic deflection unit for a television display tube has two deflection coils disposed coaxially one within the other and each comprising two diametrically opposed coil units. Each deflection coil is wound against a surface of an associated hollow moulding, which in the case of the inner coil may be the envelope of the display tube. The respective surface of each moulding has a compound curvature which is concave in one direction and convex in a direction transverse thereto. Each coil unit of each deflection coil comprises a number of turns of wire which are laid around each other in a single layer or a plurality of superimposed layers on the respective surface of the respective moulding, the wire turns being held in position by contact adhesive applied to the wire and to the surface of the moulding.
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