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| Number | Title | Issue Date |
| 4350923 | Electron gun with balanced lens lips to reduce astigmatism A 3-beam in-line electron gun comprises a pair of tub-shaped lens electrodes, each of which has three in-line apertures in its floor with tubular lips extending from the periphery of the apertures into the tubs. The lips of the lower voltage electrode are... | 09/21/1982 |
| 4345812 | Electron tube base with flow channels therein An electron tube base comprises a cup-like housing and a wafer flange extending radially outwardly from an open end of the housing. The base is mounted over the stem of an electron tube with the stem's exhaust tubulation disposed in the housing in a close... | 08/24/1982 |
| 4344015 | Screen contact means for a cathode ray tube A cathode ray tube comprises an envelope having a funnel portion with an electrical terminal extending through a wall surface thereof. A faceplate is sealed to the funnel portion and a screen contact assembly provides electrical contact between the electr... | 08/10/1982 |
| 4338543 | CRT With arc suppression means therein A CRT comprising an evacuated envelope having an electrically-insulating neck and a beaded electron-gun mount assembly housed in the neck. The beads of the assembly are closely spaced from the inner surface of the neck. An electrically-conducting band is ... | 07/06/1982 |
| 4335926 | Method for vaporizing getter material in a succession of cathode-ray tubes In a method for flashing the getter in a succession of cathode-ray tubes of different sizes and/or shapes, where the getter container is adjacent the inner surface of the tube envelope, the step of permanently fixing the getter container of each tube of t... | 06/22/1982 |
| 4327283 | Workpiece with machine-readable marking recessed therein and method of making same A workpiece having a machine-readable coded marking recessed into the surface thereof. The workpiece comprises a main body and a thin integral coating in the area of the marking. The marking comprises a plurality of related marks, such as a bar-code marki... | 04/27/1982 |
| 4323755 | Method of making a machine-readable marking in a workpiece A method for producing a machine-readable coded marking in the surface of a workpiece comprising vaporizing sequentially the surface portions of selected ones of a series of contiguous areas of unit widths of the surface.... | 04/06/1982 |
| 4316816 | Method for preparing copper-aluminum-gold-activated zinc-sulfide phosphors A method for preparing a phosphor including heating at its reaction temperature in a covered container a mixture of zinc sulfide, an activator quantity of copper as a compound thereof, an activator quantity of aluminum as a compound thereof, an activator ... | 02/23/1982 |
| 4316126 | Color television picture tube with color-selection structure and method of operation thereof CPT comprises a deflection-and-focus color-selection masking structure, a screen of parallel phosphor stripes, and means for producing three convergent in-line electron beams directed towards the target. When the CPT is operated, pairs of beamlets transmi... | 02/16/1982 |
| 4311944 | CRT With dipolar deflection and quadrupolar-focusing color-selection structure A CRT comprises a deflection-and-focus color-selection masking structure, a screen of parallel phosphor stripes, and means for producing three convergent in-line electron beams directed towards the target. The masking structure comprises a metal masking p... | 01/19/1982 |
| 4302725 | Method for testing panel-to-funnel sealing layer of a cathode-ray tube Method of testing a completed cathode-ray tube comprises applying a higher-than-operating voltage between the metal structure around the sidewall of the panel of the tube and the internal conductive coating on the funnel of the tube whereby the panel-to-f... | 11/24/1981 |
| 4302063 | Method for vaporizing getter material in a vacuum electron tube Method for vaporizing getter material from a container inside a vacuum electron tube comprises (a) sensing the location of the container from outside the tube, (b) generating signals indicating that location, (c) positioning an induction heating coil outs... | 11/24/1981 |
| 4288719 | CRT With means for suppressing arcing therein A CRT comprising an evacuated envelope having an electrically-insulating neck and a beaded electron-gun mount assembly in the neck. The beads of the assembly are closely spaced from the inner surface of the neck. At least a portion of the surfaces of the ... | 09/08/1981 |
| 4286164 | Method for determining the average width of luminescent stripes of a viewing screen In the novel method, the widths of the parallel luminescent stripes of a luminescent viewing screen are scanned by a beam of ultraviolet light whereby the stripes are excited to emit light along the path of scan. The emissions of the light in an identifyi... | 08/25/1981 |
| 4285990 | Method for coating a selected portion of the internal neck surface of a CRT A method for coating a selected portion of the internal surface of the neck of a CRT having a beaded electron-gun mount assembly housed therein. The method comprises providing in the neck at least one source of chromium metal spaced from and within line-o... | 08/25/1981 |
| 4284694 | Method for improving the adherence of a phosphor-photobinder layer to a glass support A layer of an aqueous solution containing polyvinyl alcohol and a zirconyl compound is applied to a clean glass surface and dried to produce a precoating thereon. A subsequently-applied phosphor-photobinder coating thereon is exposed to a light image and ... | 08/18/1981 |
| 4275347 | Precision cathode current regulator A precision cathode current regulator for controlling cathode current in a cathode-ray tube having a field effect transistor which is stabilized by an operational amplifier connected in a feedback mode. A second operational amplifier is electrically coupl... | 06/23/1981 |
| 4271247 | Color picture tube with screen having light absorbing areas A tube of the shadow mask type having a line screen and a slit aperture mask wherein the slits are arranged in columns and the slits in each column are separated by web portions of the mask is improved by the addition to the screen of light absorbing mate... | 06/02/1981 |
| 4257068 | System for periodically reversing the order of video data in a flat panel display device The analog video signal for a modular flat panel display device is digitized in an analog to digital converter. The digitized data are supplied to a left/right serial shift register. A left/right control signal causes the left/right shift register to peri... | 03/17/1981 |
| 4255504 | Method for producing CRT screen structure Additions of fluorescein or a fluorescein salt and a diol to a photosensitized polymeric material increase the photosensitivity thereof in a method for photodepositing a luminescent-screen structure for a cathode-ray tube.... | 03/10/1981 |
| 4254160 | Method for slurry coating a faceplate panel having a peripheral sidewall To coat the inner surface of the viewing window of a faceplate panel for a cathode-ray tube, of the type having a peripheral sidewall or flange around the window, dispense onto the surface a quantity of slurry in excess of what is required for the desired... | 03/03/1981 |
| 4243912 | Simplified resistive lens electron gun with compound linear voltage profile The electron gun includes a pair of electrodes between which a resistive lens structure comprising a stack of alternate apertured plates and resistive blocks is disposed. The stack comprises a first section which has two resistive blocks between each adja... | 01/06/1981 |
| 4243911 | Resistive lens electron gun with compound linear voltage profile The electron gun includes a pair of electrodes between which a resistive lens structure comprising a stack of alternate apertured plates and resistive blocks is disposed. A first portion of the resistive stack is electrically paralleled with another stack... | 01/06/1981 |
| 4234815 | Flat display tube having shielding member between beam guide and screen An evacuated envelope includes substantially parallel front and back walls with a cathodoluminescent screen on the front wall. Within the envelope, in spaced relation to the back wall and substantially parallel to the screen, it is an electron beam guide ... | 11/18/1980 |
| 4234814 | Electron gun with astigmatic flare-reducing beam forming region The gun, for use in a television picture tube, comprises a cathode, an apertured control grid, and an apertured screen grid aligned in the order named. The screen grid aperture comprises a rectangular slot portion facing the control grid and a circular po... | 11/18/1980 |
| 4234669 | CRT Screen structure produced by photographic method A method for preparing a screen structure for a cathode-ray tube comprising (a) exposing a water-soluble photopolymeric film on a surface to a light image to insolubilize selected portions of the film, (b) flushing the exposed film with an aqueous medium that is fr... | 11/18/1980 |
| 4232248 | Internal metal stripe on conductive layer In a cathode-ray tube wherein the electrical connection between a conductive metal body attached to and having a surface contiguous with a surface of the envelope and a conductive layer on that surface is assured by a conductive stripe contacting the body... | 11/04/1980 |
| 4230781 | Method for making etch-resistant stencil with dichromate-sensitized alkali-caseinate coating Method comprises applying to a surface to be etched a coating of a liquid composition having a pH of about 5.8 to 7.0 and comprising an alkali caseinate, an alkali dichromate photosensitizer, sodium borate and water. The layer is dried, photoexposed, deve... | 10/28/1980 |
| 4217519 | Isolation busbar for a flat panel display device In a display device having an evacuated envelope, an electron beam guide and an electron generating means for generating beams of electrons, a modulator structure on which is disposed a plurality of control electrodes may be formed by interconnecting sele... | 08/12/1980 |
| 4217014 | Method for assembling a base to an electron tube After an electron tube is exhausted and sealed, a base is pushed into position on the stem of the tube, the space between the stem and the base, at least around one pin of the tube, is filled with a sealing substance, and then the stem is heated until the... | 08/12/1980 |
| 4216407 | Flat panel display device with beam collector An evacuated envelope includes spaced substantially parallel front and back walls, and a plurality of spaced, parallel support walls between the front and back walls and forming a plurality of channels. An electron gun structure at one end of the channels... | 08/05/1980 |
| 4215293 | Cadence scanned flat image display device An image display device includes a flat evacuated envelope which has a front and a back wall. On the inner surface of the front wall is a phosphor screen for displaying the image. A first set of electron beam guides is between the back wall and the screen... | 07/29/1980 |
| 4214798 | Method for spot-knocking the electron-gun mount assembly of a CRT A method for spot-knocking a CRT comprising interconnecting the lower-voltage gun elements including the heater, the cathode, the control electrode and the screen electrode, and applying spot-knocking voltages between the anode and the interconnected gun ... | 07/29/1980 |
| 4213663 | Wet carbon-dioxide treatment of partially-completed CRT In a method of making a virgin CRT (cathode-ray tube), soon after the panel and funnel are sealed together to form a bulb, the inside of the bulb is flushed with wet carbon-dioxide gas and then flushed with dry noncontaminating gas. Subsequently, the moun... | 07/22/1980 |
| 4210988 | Method for making an indirectly-heated cathode assembly In a method for making an indirectly-heated cathode assembly, the steps of spacing the heater from the cathode substrate with a temporary volatilizable spacer, fixing the positions of the heater and cathode with respect to one another with the spacer ther... | 07/08/1980 |
| 4207000 | Waveguide method for determining stress at the convex surface of a body Method comprises (1) introducing a polarized light beam into the convex surface of an optically-transparent body whereby the beam propagates in the body in a guided manner near the surface, (2) extracting at least a portion of the beam from the body throu... | 06/10/1980 |
| 4200274 | Fixture for holding a faceplate and a funnel of a CRT during sealing A fixture for supporting and aligning the faceplate and funnel of a CRT while they are being sealed together includes a plurality of alignment structures, at least one of which comprises rotatable rollers on a shaft oriented so that peripheral surface por... | 04/29/1980 |
| 4199705 | Modulator structure for a flat panel display device In a display device a modulator structure may be formed by disposing on a surface of the back wall a plurality of first control electrodes. A modulator member having a smoothly continuous surface has disposed thereon a plurality of second control electrod... | 04/22/1980 |
| 4196370 | CRT generating three inline beams and having shunts for weakening center beam horizontal magnetic deflection and strengthening vertical deflection An inline electron gun includes means for weakening the effect of a portion of the horizontal magnetic deflection field on the center electron beam and for strengthening the effect of a portion of the vertical magnetic deflection field on the center elect... | 04/01/1980 |
| 4190936 | Apparatus and method for determining deviation of mask-to-faceplate spacing in a cathode-ray tube Apparatus and method are provided for determining the deviation in mask-to-faceplate spacing from a desired spacing during cathode-ray tube construction. The apparatus utilizes the novel method which comprises the steps of sensing the position of the inte... | 03/04/1980 |
