Electronic clinical thermometer

Details Electronic clinical thermometer Electronic clinical thermometer

1983-05-06

1985-03-19

Frankfort, Charles

Thermal measuring and testing

Temperature measurement

By electrical or magnetic heat sensor

331 46, 374170, 377 25, G01K 732

Patent

active

045055998

ABSTRACT:
An electronic clinical thermometer comprises oscillating circuitry for producing two oscillating output signals having respective frequency-temperature coefficients which are widely different from each other. A frequency dividing circuit frequency divides one of the two output signals to produce a gate timing signal which controls the gating of the other oscillating output signal to an up/down counter. A switch coacts with the frequency dividing circuit to enable selective changing of the frequency dividing ratio, and another switch coacts with the up/down counter to enable variable setting of the reference count value from which the counter begins to up-count the oscillating output signal to produce an output counter number indicative of the measured temperature. A display device is connected through a decoder driver circuit and a latch circuit to the up/down counter and displays indicia representative of the measured temperature.

REFERENCES:
patent: 3879992 (1975-04-01), Bartera
patent: 4150573 (1979-04-01), Iinuma et al.
patent: 4325036 (1982-04-01), Kuwabara
patent: 4371271 (1983-02-01), Bellet

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