Electronic thermometer

Details Electronic thermometer Electronic thermometer

1988-10-25

1989-08-29

Cuchlinski, Jr., William A.

Thermal measuring and testing

Temperature measurement

By a vibratory effect

374184, 331 66, 331 68, 310344, 310319, G01K 732, G01K 1126

Patent

active

048611689

ABSTRACT:
An electronic thermometer has an oscillator, the frequency determining element of which is a temperature sensitive piezoelectric element, used as a measuring sensor, which is located in a sealed housing of electrically insulating material. The piezoelectric element is provided with two terminal electrodes, which are each connected via a respective capacitor to the oscillator circuit, and each of the two capacitors has electrodes, one located inside and one located outside the housing.

REFERENCES:
patent: 2943196 (1960-06-01), Eickhoff
patent: 3303701 (1967-02-01), Hatsuura et al.
patent: 3474267 (1969-10-01), Colberg
patent: 3796968 (1974-03-01), Luscher
patent: 3969640 (1976-07-01), Staudte
patent: 4468583 (1984-08-01), Mori
patent: 4639631 (1987-01-01), Chason et al.
patent: 4677397 (1987-06-01), Nakayama et al.
patent: 4772130 (1988-09-01), Ueda et al.

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