Glass electrode structure for radio capsule

Details Glass electrode structure for radio capsule Glass electrode structure for radio capsule

1974-05-13

1976-01-20

Tung, T.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

204286, 204290R, 128 21A, 128 21E, G01N 2736, A61B 504

Patent

active

039336123

ABSTRACT:
Disclosed is a radio capsule having an electrode structure for measuring the concentration of an ionic species in an ion containing solution. A thin film conductive electrode is strongly bonded to the inner surface of a thin cylindrically shaped membrane of glass sensitive to the ionic species. A conductive lead wire makes electrical contact with the electrode. A mass of non-conductive reinforcing backing material having a thermal coefficient of expansion greater than that of the membrane strongly adheres to the conductive electrode and the membrane. The backing material is cured or solidified at a temperature sufficiently higher than that at which the electrode structure is to be used so that contraction of the backing material during curing places the membrane in a state of compression, thereby strengthening the same. The resultant electrode structure is incorporated into a radio capsule which also comprises circuitry for transmitting a signal modulated in accordance with the concentration of the measured ionic species.

REFERENCES:
patent: 3547794 (1970-12-01), Nishimoto et al.
patent: 3700577 (1972-10-01), Grauer
"Handbook of Epoxy Resins," pp. 17-16, 1967.
Kitagawa et al, "Gastroenterology," Vol. 31, No. 3, Sept. 1966, pp. 368-372.
"Glass Electrode," Dole, 1941, p. 92.
Storer et al, "JAMA," Vol. 178, No. 8, pp. 134 & 135, Nov. 1961.

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