Abstract:
A method of insulating a cathode ray tube and an electrical insulator composition for a cathode ray tube enabling an electrical insulator to be produced without material loss and enabling improvement of the bonding strength between a stem and a stem base and the insulation property between stem pins, when attaching to a stem, which is provided at the cathode ray tube and has a tip and stem pins projecting therefrom, an insulating stem base, which comprises a base through which pin through holes are formed and has provided projecting from the front surface thereof a tip holder, in a state with the stem pins inserted through the pin through holes and the tip held in the tip holder, said method comprising the steps of molding an electrical insulator composition comprising an uncured self-adhesive silicone rubber into a predetermined sheet shape by using a transfer mold to obtain an electrical insulator, arranging the electrical insulator in a state extending from the positions of the pin through holes on the back of the base of the stem base to the tip holder and adhering it to the back of the base, folding the portion of the electrical insulator extending to the tip holder to the inside surface of the tip holder, and attaching the stem base to the stem.
Abstract:
In a gas discharge tube in accordance with the present invention, a side tube is formed from a metal, the outer periphery of the stem is provided with a joint portion made of a metal, and the latter is joined to a metal-made joint portion of the side tube by welding, whereby the assembling is made easier by welding, while the gas discharge tube itself can attain smaller dimensions. Also, since the side tube is small and made of a metal, its handling improves greatly. Further, since side tube is formed from a metal, the gas discharge tube is encouraged to have a wider range of processed forms and attains a prospect for mass production.