Electronic thermometer

Details Electronic thermometer Electronic thermometer

1975-07-29

1978-01-17

Queisser, Richard C.

Measuring and testing

Gas analysis

Moisture content or vapor pressure

G01K 724

Patent

active

040685268

ABSTRACT:
An electronic circuit for use with a thermistor-type thermometer which makes only two measurements and provides a multiple temperature scale capability, a low-power indicator, a simple counting circuit and an enabling control circuit. The thermistor-type thermometer provides a signal having a pulse rate which varies with the temperature sensed and the electronic circuit of the invention operates on this signal to visually display the final temperature after only thirty seconds. Decade counters and logic gates are used with a crystal controlled oscillator to provide counting and timing signals as well as enabling signals required by a specialized temperature prediction algorithm.

REFERENCES:
patent: 3217144 (1965-11-01), Hinnah
patent: 3311842 (1967-03-01), Beck
patent: 3702076 (1972-11-01), Georgi
patent: 3822598 (1974-07-01), Brothers et al.
patent: 3872726 (1975-03-01), Kauffeld et al.
patent: 3882481 (1975-05-01), Turner
patent: 3906796 (1975-09-01), Dumbeck

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