Gte Sylvania Incorporated

Charles A Davis

David Benda

Anthony V Gallaro

Harry E Smithgall

Ralph E Neuber

The invention provides an improvement in the means for supporting a container of effusive material located on the terminal end of an antenna-type positioning member for use in a cathode ray tube. The supporting structure is comprised of a rotatable member accommodated on axle means affixed to the positioning member at a region rearward from the forward edge of the material container. An augmentive fender-like protective component is associated with the rotatable member to shield that member from effusive material and to prevent any accumulated electric charge thereon from interfering with the scanning of the electron beam in the tube.

Shielded getter support on rotor-supported antenna

An improvement for inhibiting arcing within a cathode ray tube comprises a combination including a low resistive electrical coating disposed interiorly on the forward portion of the funnel, joined with a high resistive coating disposed interiorly on the rearward portion thereof. Associated therewith are getter means having discretely shaped diffusion direction means to prevent the formation of a conductive path across the high resistive coating. The improved arc suppression combination beneficially improves the dielectric breakdown protection for both the tube and the associated circuitry.

Directional getter attached to multi-apertured member

Improved means are provided for supporting a container of effusive material within a cathode ray tube wherein the container is located at the terminal end of a resilient longitudinal positioning member attached to the electron gun assembly. The supportive means includes at least one support placement means which projects forwardly from the container as a directional continuation of the positioning member. Associated with the support placement means is a rotatable member, the peripheral surface of which tracks in a direction common with the directional trend of the positioning member. The rotatable member, which may be formed of insulative material, effects facile positioning with a minimum of abrasion and positive spatial supportive placement of the container relative to the wall of the envelope.

Elongated getter support for cathode ray tube having rotatable member at

An improvement combination is provided in cathode ray tube construction for expediting improved tube processing and subsequent tube operation. The combination is incorporated in the funnel portion of the tube wherein a first low resistive electrical conductive coating is interiorly disposed in a substantially circumferential manner on the forward portion of the funnel nearest the screen. A high resistive electrical conductive coating is substantially circumferentially interiorly disposed on substantially the intermediate portion of the funnel being contiguous with the first coating, and making contact with a second low resistive electrical conductive coating interiorly disposed on substantially the rear portion of the funnel. This second coating extends into the forward region of the integral neck portion to facilitate electrical connection with the electron gun assembly positioned therein. A first button connector is oriented to traverse the wall of the forward region of the funnel and make connection with the first low resistive coating. Rearward from the first button, a second button connector traverses the wall of the funnel to provide a separate electrical connection for the second low resistive coating. During tube processing, utilization of this second button facilitates high voltage conditioning of the electron gun assembly by by-passing the high resistance coating; while in subsequent tube operation only the first button connector is utilized thereby effecting beneficial arc protection by incorporating the high resistive coating into the circuit.

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Auburn, NY, United States of America

Charles A Davis