摘要:
A non-adhesive, conductive strip is used to provide an electrical ground path between a solder electrode on the anti-reflective film of a cathode ray tube and the reinforcement or heat shrinkage band on the tube. The conductive strip is preferably held in place on the cathode ray tube using a magnet or magnets. Consequently, because the conductive strip is held in place by magnets and is non-adhesive, it can be removed and replaced repeatedly during the testing of the solder electrodes and anti-reflective film without potentially damaging the solder electrode or degrading the performance of the conductive tape that is typically used as the ground path in a completed cathode ray tube.
摘要:
A jig can be used to site-test the accuracy of multi-meters that are used to measure resistances in a cathode ray tube production line without having to remove those multi-meters from the production line or ship them to a third party service provider for the testing. The jig is a box of electronics that includes a variety of known resistance loads that can be selected and then measured by a multi-meter to test and/or calibrate that meter. The jig includes a number of known resistance loads, a device for selecting a particular resistance load and electric contacts for connecting a multi-meter to the jig so that the meter can measure the selected and known resistance load. By comparing the measured and known resistance values, the accuracy of the multi-meter is tested.
摘要:
High-voltage power supplies used in a Cathode Ray Tube (nullCRTnull) manufacturing process should be protected from residue, dust and other contaminants. This will prevent possible damage to the voltage power supply and danger to people and equipment that can result from operation of a dirty voltage power supply. A protective housing made of a non-conductive, insulating material is used to encase and protect the voltage power supplies used in a CRT manufacturing process. This protective housing protects those voltage power supplies from degradation or damage due to the dust, residue or other contaminants that arise from the CRT manufacturing process. A cooling system may be incorporated into the housing to manage thermal energy generated by the voltage power supply unit.
摘要:
An insulating member is used on or with a high-voltage probe that applies a voltage to the anode of a cathode ray tube during manufacture of the tube. If there are flaws in the frit seal of the tube, the probe produces arcing through the flaw into a grounded, conductive band disposed around the exterior of the frit seal. The insulating member is placed between the high-voltage probe tip and the grounded band around the frit seal. Consequently, the insulating member prevents electrical arcing external to the cathode ray tube between the high-voltage probe and the grounded band. Such arcing would otherwise interfere with the testing of the frit seal and could possibly damage the test equipment.
摘要:
When an installed electron gun has failed testing, the gun is cut out of the neck of the Cathode Ray Tube (nullCRTnull) without destroying or damaging any other portion of the CRT. A new neck is then formed on the tube which can be re-inserted into the production line and re-used. The reclaimed electron gun can then be analyzed and tested to determine the cause of its malfunction or test failure. In this way, minimal damage is done to the CRT in which the gun is originally installed and as much of that CRT as possible is salvaged for use in a completed unit.
摘要:
An improved shaft is described with which a sponge saturated with carbon coating can be pushed through the narrow neck of a cathode ray tube funnel to fully coat the interior of the neck with the carbon coating. The improved shaft is made of a plastic composite material. The preferred material for the improved shaft is garolite. This improved shaft is much less expensive that previous stainless steel shafts and has enough flexibility that it is not easily bent when plunged into a funnel that is not properly aligned and centered under the shaft.
摘要:
A hand tool can be used for measuring the thickness of a carbon layer applied in a cathode ray tube funnel during manufacture of the tube. The hand tool includes a scribe with a cutting blade or point that extends under the control of the user relative to the rest of the tool. The extension of the scribe relative to the base of the tool, which may be a roller, rollers or a skid plate, indicates the thickness of the carbon layer. The tool can also be applied to measure the thickness of other material layers deposited on a substrate.
摘要:
During manufacture, the components of a cathode ray tube must be protected against contaminants, such as dust, that will degrade performance of the completed tube. A protective tunnel, in which a contaminant-free environment can more easily be maintained, protects open cathode ray tube funnels that are moved between a coating station and a drying oven. Access doors may be provided to allow for cleaning and maintenance of the tunnel, as well as access to cathode ray tube funnels in the tunnel. A vacuum system may also be provided to clean airborne contaminants from the protective tunnel.