Quartz thermometer

Details Quartz thermometer Quartz thermometer

1976-01-02

1977-08-02

Kominski, John

Oscillators

Beat frequency

Frequency or amplitude adjustment or control

73362R, 310361, 310366, 331 66, H03B 2500, H03B 532

Patent

active

040399699

ABSTRACT:
A quartz crystal thermometer in which a standard frequency is generated by a first oscillator circuit incorporating a quartz crystal element and in which a frequency which varies with temperature is generated by a second circuit incorporating the same quartz crystal element. Two electrode pairs are provided on the single quartz crystal element in order to excite two different modes of vibration of the quartz crystal element, with the metallization being on only one or on both of the major faces of the quartz crystal element. In accordance with preferred embodiments, an AT- or a BT-cut quartz crystal plate is utilized. The ratio of the said two frequencies provides an accurate measure of the temperature.

REFERENCES:
patent: 1850580 (1932-03-01), Coram
patent: 2456811 (1948-12-01), Blackburn
patent: 3617923 (1971-11-01), Paradysz

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