Abstract:
An electron gun system for a three beam color display tube. Slot-shaped openings are provided in the sides of cup-shaped focusing electrodes of the system to facilitate alignment during assembly. The electrodes are stacked on a jig having a pin passing through central electron beam apertures of the respective electrodes. Arms having V-shaped ends are then passed through the slot-shaped openings until they engage collars of the electrodes which define the apertures in the respective electrodes.
Abstract:
A beading apparatus for an electron gun assembly having a plurality of self-indexing insulating support rods with a plurality of indexing cavities formed in a surface thereof comprises at least two bead blocks. Each of the bead blocks has a beading support surface with a plurality of apertures formed therein. An indexing pin is disposed in each of the apertures. Each of the indexing pins has a reference end which extends beyond the beading support surface and projects into the indexing cavities of the insulating support rods. A vacuum is applied to the support rods to retain the support rods in contact with the indexing pins. In a second embodiment a support foot is used in conjunction with the vacuum to retain the support rods in contact with the indexing pins.
Abstract:
A two chamber vacuum method and apparatus is provided for simultaneously independently preparing image tube components, or the like, with two distinct vacuum environments for separate preparation of the components, and for final assembling of these components in an interconnecting compartment by vacuum sealing.
Abstract:
A variety of technologies have been applied in the development of a bondedrid cathode. Erosion lithography is used for making the fine-detail grid structure, combining air erosion and lithographic techniques. To obtain openings of the order of 0.001 inch (one mil) or smaller, a nozzle with a high aspect ratio exit opening is used, and the cathode grid structure is scanned. A photo resist in which the grid pattern is developed is used over the molybdenum or tungsten grid film. The metal film is removed from the grid openings by chemical etching. The photo resist over the metal grid is used as a composite mask for removing the BN insulation in the openings by erosion with Al.sub.2 O.sub.3 powder from the special nozzle on the air blast gun.
Abstract:
The mercury-vapor pressure within a fluorescent lamp is controlled by a metal (indium or an alloy of indium and tin, for example) that wets glass, combines with the mercury within the lamp to form an amalgam and is divided into segments which are fused directly to one or both of the glass stems at spaced locations. The amalgamative-metal segments are of such shape and mass that they inherently remain in place on the stem when they are heat-softened and pressed onto the glass surface. Segments of larger size and mass are retained in place by an overlying porous layer of inert material that adheres to the glass. The amalgamative metal can also be combined with a fusible binder to form a composite which is divided into small pellets that are pressed onto the glass stem and held in place by the adhesive action of the binder when the latter is fused during the bulblehring operation required to fabricate the lamp.
Abstract:
A device for assembling and aligning the electrode planes of a multibeam electron gun structure for an electron discharge device, such as a high resolution cathode ray tube which utilizes a defined array of collimated electron beams provided by the multibeam single gun structure. The device facilitates aligning a planar arrangement of separate control electrode members, forming an aperture array, with at least one accelerating-collimating electrode plane having a similar array of apertures. The accelerating-collimating electrode so oriented in spaced and substantially parallel relationship with the control grid plane provides a collimated array of beams directed to impinge the cathodoluminescent screen in a defined pattern array.
Abstract:
Cathodes employed in an electron gun assembly are loaded and positioned in precise alignment relative to associated components of the gun assembly by means of a probe. The cathode loading assembly roughly positions the cathode within a supporting cylinder. An opening in the control grid receives a probe forming part of an air gauge having a float in its air column. A fine adjustment is made by operating a hand-wheel to precisely locate the cathode relative to the grid. The exact adjustment is indicated by positioning the float within tolerance markers while making the fine adjustment. The reading of the air gauge indicates back pressure imposed on the air escaping from the orifice of the probe. Once precisely located, a welding unit is activated, which moves the welding electrode into contact with the cathode support to secure the cathode by welding in its precise location. The welding assembly is retracted, the next cathode and cathode supports is placed into loading position, and the above operations are repeated wherein loading and welding of cathodes within an electron structure is performed in a rapid reliable and substantially automatic fashion.