Focussing solenoid, application thereof and a process for manufacturing same
AssigneeThomson-CSF
InventorPierre Caillat
Life of this patent
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Abstract
The present invention provides a focussing solenoid for focussing an electron beam in a picture taking tube. This focussing solenoid comprises a sleeve which has a helical etching in which are housed the turns of a first layer of wire. For all the other layers of wire wound in a helix about the sleeve, the slope of the turns of the helix with respect to the sleeve is substantially the same and the turns of one layer are guided by the turns of the preceding layer. Connections connect the layers together so that all the layers have the same winding direction about said sleeve.
Claims20
In a focussing solenoid formed by an insulated wire wound in the form of a helix around an insulating cylindrical sleeve, the turns of the helix being jointing and the solenoid comprising several superimposed wire layers having the same winding direction around the sleeve, said sleeve having a helical etching in which the turns of the first layer are housed, and the slope of the turns of the helix with respect to said sleeve of each of the wire layers wound in a helix around the sleeve is substantially the same, connecting means being provided between the wire layers to obtain a substantially uniform magnetic field parallel to the sleeve axis.
In a focussing solenoid formed by an insulated wire wound in the form of a helix around an insulating cylindrical sleeve, the turns of the helix being jointing and the solenoid comprising several superimposed wire layers having the same winding direction around the sleeve, said sleeve having a helical etching in which the turns of the first layer are housed, said solenoid comprising:
- several sleeves having a helical etching in which are housed the turns of a layer of wire,
- each sleeve having the same helical etching as that of the preceding one, but in the opposite direction,
- the slope of the turns of the helix with respect to the sleeve for all the wire layers wound in a helix about the same sleeve, being substantially the same,
- the wire being cut after each layer, and
- connections connecting the ends of one layer to the ends, situated on the same side of the sleeves, of two other layers formed around another sleeve.
In a focussing solenoid formed by an insulated wire wound in the form of a helix around an insulating cylindrical sleeve, the turns of the helix being jointing and the solenoid comprising several superimposed wire layers having the same winding direction around the sleeve, said sleeve has a helical etching in which the turns of the first layer are housed,
- the first layer, whose turns are housed in the helical etching of said sleeve, is followed by other layers wound in a helix around said sleeve, the slope of the turns of the helix of all these layers with respect to the sleeve being substantially the same,
- this first series of layers is followed by other series of layers and, for each series, the slope of the helix with respect to said sleeve is substantially the same and is opposite that of the turns of the layers of the preceding series,
- the layers of the other series are bonded together,
- the wire is cut after each layer,
- connections connect the ends of one layer to the ends, situated on the same side of the sleeve, of two other layers forming part of another series.
Dependencies are inferred from the claim text.