Portable probe type clinical electronic thermometers

G - Physics – 01 – K

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73/164, 73/72

G01K 7/24 (2006.01) G01K 1/02 (2006.01) G01K 13/00 (2006.01) G01R 13/40 (2006.01)

Patent

CA 1067717

Abstract of the Disclosure Temperature indicating apparatus having a sensor for introduction into a region having a tempera- ture to be measured and for supplying an analog signal whose amplitude is a function of the temperature therein. The analog signal amplitude is compared with a reference level which represents a preselected temperature level, and a signal is supplied when the analog signal amplitude reaches the reference level which thereby causes pulses to be supplied at a predetermined rate. A timer respon- sive to the pulses counts from zero to a preselected value and supplies a timing signal when the preselected value is reached. The time required for the timer to count from zero to the preselected value establishes a predetermined timing interval at the end of which a converter responsive to the timing signal converts the analog signal to a digital signal representative of the temperature in the region. Display circuitry responsive to the digital signal provides a visual indication of the temperature in the region being measured, this temperature being displayed only at the end of the predetermined timing interval.

265042

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