Abstract: An improved internal voltage divider for use in a television cathode ray tube is disclosed that provides one or more temperature-invariant voltages. The tube is subject to internal spatial temperature patterns fixed or varying with time which are incidental to tube warm-up and operation. The voltage divider according to the invention is comprised of at least two electrically series connected resistive sections having like temperature coefficients, and having resistive values of the same order of magnitude. Each section is so positioned and arranged relative to the aforesaid temperature patterns as to have similar average temperature experiences. The voltage divider is connected between a relatively high anode voltage and a suitable low-voltage terminal for receiving a relatively low voltage through the base of the tube. Means are provided for tapping off at least one temperature-invariant intermediate voltage.

Abstract: This disclosure depicts and describes a unitized, in-line electron gun for television cathode ray tubes having a bead-type structure for mechanically supporting, spacing, aligning and electrically isolating gun components. This disclosure is particularly directed to an improved system of electrode support that absorbs stress induced during the mounting process to leave the gun structure substantially free of residual stress, thus reducing the incidence of bead fracture and electrode displacement.

Abstract: Arc-inhibiting means for a television picture tube having an electron gun with a main focus lens section of the extended field type. The lens establishes an extended, axially continuously active focusing field which is substantially shielded from external field disturbances. There exist widely disparate potentials with a potential difference in the range of tens of kilovolts across the gap between a grid means of an electron source means and an initial end electrode of the main focus lens. The potential difference is sufficient to introduce a tendency toward destructive arcing between the grid means and the initial end electrode. The electron gun according to the invention is characterized by having at least one arc-inhibiting electrode disposed between the grid means and the initial end electrode, and having a potential thereon that is intermediate to the disparate potentials to provide an arc-inhibiting voltage gradient between the grid means and the initial end electrode.

Abstract: This disclosure depicts a color cathode ray tube including a shadow mask and improved suspension means for suspending the mask adjacent to the flangeless faceplate of the tube. The improved suspension means comprises a plurality of metal studs spaced about the periphery of the shadow mask assembly and outside the viewing area of the faceplate. The studs are characterized by having an intermediate part which has in its cross-section a non-circular profile tapering gradually in a radially inwardly direction to a blunt extremity so as to present to radially out-rushing screening fluid an initially narrow, gradually expanding profile which promotes laminar flow of screening fluid around the stud during the radial flow suffusion process. The effect is to inhibit screening fluid wash back and consequent formation of permanent, visible wave patterns in the coating upon drying.

Abstract: This disclosure depicts a quick-mount electron gun mounting means for use in a television cathode ray tube. The tube has a neck terminated by a base and includes adjacent to the base an electron gun support plate rigidly supported closely adjacent to the base by lead-in pins. The quick-mount gun mounting means include male-female socket components, with said gun having one socket component including means embedded in at least one of said beads, the plate having means defining the other socket component. The socket components provide for facile and secure plugging together of the gun and the base. The combination includes electrically conductive means connected between at least one of the lead-in pins and one of the gun electrodes. The male-female socket components provide also for the facile and secure plugging together of electrically conductive paths to transmit electrical voltages or currents between the lead-in pins and the gun electrodes.

Abstract: For unitized, in-line electron guns for television color cathode ray tubes, an improved method for mounting the convergence cup is depicted and described. The method facilitates production assembly and provides accurate alignment of the convergence cup with respect to the main gun assembly.

Abstract: This disclosure depicts an electron gun for use in a color cathode ray tube of the small neck, shadow mask-type. The gun includes an extended field lens for generating a cluster of electron beams converged and individually focused at the screen of the tube. Three main focus lens means are situated on lens axes which are mutually parallel and parallel to a gun central axis. At least two of the lens axis are off-axis with respect to the gun axis. The focus lens means has for each beam at least three electrodes including a focus electrode for receiving a variable potential for electrically adjusting the focus of the beam. In succession down-beam, there are at least two associated electrodes having potentials thereon which forms in the gaps between adjacent electrodes significant main focus field components. To adjust beam focus, the strength of a first of these components is controlled by adjustment of the voltage received by the focus electrode.