Fluid electrode and method of making

Details Fluid electrode and method of making Fluid electrode and method of making

1983-10-28

1987-04-28

Goldberg, Howard N.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

65138, 65 36, 65 40, 65 5925, 29825, G01N 2726, C03B 2320, H01R 4300

Patent

active

046612360

ABSTRACT:
An improved electrode for detecting ion concentration and a method of manufacturing such an electrode. The electrode includes concentric glass tubes, including an inner tube which is filled with a filling solution and a larger, outer tube which extends above the level of the filling solution in the inner tube. A metal contact is immersed in the filling solution and extends outside the inner tube through a hermetic seal to allow electrical contact to be made to the filling solution. The inner tube is made of a different glass from the outer tube so that the inner tube will absorb radiation at selected wavelengths which are transmitted by the outer tube. The inner tube is illuminated with radiation of the proper wavelength so that the inner tube melts and collapses around the metal contact to form the hermetic seal. In an alternate embodiment, the electrode has an inner tube which is made of two different types of glass. An apparatus for mechanizing the electrode sealing process is also described.

REFERENCES:
patent: 3217088 (1965-11-01), Steierman
patent: 3444068 (1969-05-01), Leonard et al.
patent: 3523777 (1970-08-01), Petersen et al.
patent: 3660064 (1972-05-01), Rohde
patent: 3741884 (1973-06-01), Deushane et al.
patent: 3749562 (1973-07-01), Nicolas et al.
patent: 3855095 (1974-12-01), Leonard et al.
patent: 3876409 (1975-04-01), Sangermang et al.
patent: 4182668 (1980-01-01), Koshiishi et al.

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