Method for manufacturing a gas-filled discharge tube for use as

Details Method for manufacturing a gas-filled discharge tube for use as Method for manufacturing a gas-filled discharge tube for use as

1981-10-05

1984-03-20

Godici, Nicholas P.

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

445 40, 445 54, H01T 2100

Patent

active

044378459

ABSTRACT:
A method for manufacturing a gas-filled discharge tube, designed, e.g., as transient protector, containing tube components comprised of at least two electrodes and an insulating body holding the electrodes joined vacuum-tight, with the electrodes and the insulating body dimensioned and arranged in such a way that at least one discharge gap is present in the tube, is disclosed. The manufacturing process consists of sealing at a suitable temperature the components of the tube at substantially atmospheric pressure in a light gas mixed with another gas which, in view of the intended function of the tube, is desirable and heavier than the first-mentioned gas, and reducing the pressure exteriorally of the tube below atmospheric pressure, while simultaneously lowering the temperature to such extent that the heavy gas can only to an insignificant degree penetrate the tube walls through diffusion and/or effusion, and the enclosed light gas can diffuse and/or be effused through the walls such that, as a result of the pressure difference, it will exit through the walls of the tube, thus causing a reduction in the total gas pressure inside the tube.

REFERENCES:
patent: 3576066 (1971-04-01), Steward
patent: 4383723 (1983-05-01), Schleimann-Jensen

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