Electron-beam tube as symbol-printing tube

Claim 2

An electron beam tube for continuous conversion of electrical data siGnals into characters, symbols or the like composed of scanning pattern points arranged in lines and to be reproduced on a fluorescent target, comprising: cathode means for providing a plurality of parallel electron beams; a controllable beam forming arrangement disposed adjacent said electron beams; an electronoptical acceleration lens disposed adjacent said controllable beam forming arrangement; a beam deflecting system disposed adjacent said electron-optical acceleration lens; a plurality of lenses disposed between said deflecting system and said target having focal lengths dimensioned to provide a reduced image upon said target, said plurality of lenses including a pair of cylindrical abberation correcting lenses disposed directly adjacent said target for effecting distortion correction; and a cylindrical metal housing having an open end directed toward said target and a large aperture directed toward said deflecting system, said pair of cylindrical lenses disposed within said housing and each consisting of a metal strip electrically isolated from the other.

Claim 3

An electron beam tube according to claim 1, wherein said metal housing is connected to a high potential of about 10 kV, and comprising means for applying approximately the same potential to said cathode and to said metal strips and changing the potentials so applied to provide dynamic focusing.

Claim 4

An electron beam tube for continuous conversion of electrical data signals into characters, symbols or the like composed of scanning pattern points arranged in lines and to be reproduced on a fluorescent target, comprising: cathode means for providing a plurality of parallel electron beams; a controllable beam forming arrangement disposed adjacent said controllable beam electron beams; an electron-optical acceleration lens disposed adjacent said controllable beam a beam deflecting system disposed adjacent said electron-optical acceleration lens; and a plurality of lenses disposed between said deflecting system and said target and having focal lengths dimensioned to provide a reduced image upon said target, said plurality of lenses including a pair of cylindrical abberation correcting lenses disposed directly adjacent said target for effecting distortion correction, said beam forming arrangement corresponding to an electron beam matrix and including electrodes arranged parallel to each other and each comprising flat metal sheets, each of said sheets including a plurality of holes therein to form the same aperture raster matrix, the aperture raster matrix consisting of up to 20 X 30 holes with the holes of each sheet being aligned with the holes of the other such sheets.

Claim 5

An electron beam tube for continuous conversion of electrical data signals into characters, symbols or the like composed of scanning pattern points arranged in lines and to be reproduced on a fluorescent target, comprising: cathode means for providing a plurality of parallel electron beams; a controllable beam forming arrangement disposed adjacent said controllable beam electron beams; an electron-optical acceleration lens disposed adjacent said controllable beam a beam deflecting system disposed adjacent said electron-optical acceleration lens; and a plurality of lenses disposed between said deflecting system and said target and having focal lengths dimensioned to provide a reduced image upon said target, said plurality of lenses including a pair of cylindrical abberation correcting lenses disposed directly adjacent said target for effecting distortion correction, said beam forming arrangement corresponding to an electron beam matrix and including electrodes arranged parallel to each other and each comprising flat metal sheets, each of said sheets including a plurality of holes therein to form the same aperture raster matrix, the aperture raster matrix consisting of up to 20 X 30 holes with the holes of each sheet being aligned with the holes of the other such sheets.

Claim 6

An electron beam for continuous conversion of electrical data signals into characters, symbols or the like composed of scanning pattern points arranged in lines and to be reproduced on a fluorescent target, comprising: cathode means for providing a plurality of parallel electron beams; a controllable beam forming arrangement disposed adjacent said electron beams; an electron-optical acceleration lens disposed adjacent said controllable beam forming arrangement; a beam deflecting system disposed adjacent said electron-optical acceleration lens; and a plurality of lenses disposed between said deflecting system and said target and having focal lengths dimensioned to provide a reduced image upon said target, said plurality of lenses including a pair of cylindrical abberation correcting lenses disposed directly adjacent said target for effecting distortion correction, said cathode means including a plurality of cathodes each operable to provide a separate electron beam and each including a respective line for receiving a respective scanning potential.

Claim 7

An electron beam for continuous conversion of electrical data signals into characters, symbols or the like composed of scanning pattern points arranged in lines and to be reproduced on a fluorescent target, comprising: cathode means for providing a plurality of parallel electron beams; a controllable beam forming arrangement disposed adjacent said electron beams; an electron-optical acceleration lens disposed adjacent said controllable beam forming arrangement; a beam deflecting system disposed adjacent said electron-optical acceleration lens; and a plurality of lenses disposed between said deflecting system and said target and having focal lengths dimensioned to provide a reduced image upon said target, said plurality of lenses including a pair of cylindrical abberation correcting lenses disposed directly adjacent said target for effecting distortion correction, said cathode means including a plurality of cathodes each operable to provide a separate electron beam and each including a respective line for receiving a respective scanning potential.