Importance

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Abstract

A method for producing a compact gas-discharge tube, or lamp, and the tube or lamp so produced, comprising making at least two U-shaped main tube components of glass tube. The tube components are joined together at one limb to form a closed, continuous discharge chamber provided with electrodes at each outer end thereof and a layer of fluorescent substance on the inner glass surface thereof. The main tube components are joined together by heating an obliquely cut, free limb and of one main tube component and joining this heated end to a corresponding, heated end of a second main tube component. The resultant connection is formed while applying heat and is bent in a manner such as to have a U-shaped configuration, substantially devoid of discontinuities. The invention also relates to a compact gas-discharge tube of this kind in which the free, internal cross-section area of the connection is at least 50% of the corresponding area of the limbs, and in which the glass thickness of the connection is equal to at least 50% of the glass thickness of the limbs.

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First Claim