Fluid-gauging probes and their manufacture

Details Fluid-gauging probes and their manufacture Fluid-gauging probes and their manufacture

1986-05-13

1987-09-01

Stearns, Richard R.

Measuring and testing

Liquid level or depth gauge

Immersible electrode type

324 61P, 361284, G01F 2326, H01G 528

Patent

active

046899910

ABSTRACT:
A characterized inner electrode for a capacitive fuel-gauging probe comprises several discrete tubular sections of different diameters which are joined together end-to-end by metal coupling pieces. One or more of the tubular sections has two regions of different diameters that are continuous with one another, the smaller diameter region being formed by swaging down from the larger diameter region. The coupling piece has two shoulders to which the ends of the tubular sections are electron-beam welded. The coupling piece also has respective annular recesses into which a low viscosity adhesive is introduced via overlying apertures in the tubular sections after welding, so as to form an adhesive joint between the coupling piece and the tubular sections. The ends of the coupling piece are a close fit within the tubular sections and extend into them by a distance at least twice the diameter of the coupling piece.

REFERENCES:
patent: 2789435 (1957-04-01), Weiss
patent: 3349301 (1967-10-01), Bell
patent: 3512252 (1970-05-01), Sargent
patent: 3827300 (1974-08-01), Thaler
patent: 4467646 (1984-08-01), Berryman et al.
patent: 4487066 (1984-12-01), Pardi et al.

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