Measuring and testing – Gas analysis – Moisture content or vapor pressure
Patent
1976-02-09
1978-09-19
Gill, James J.
Measuring and testing
Gas analysis
Moisture content or vapor pressure
G01K 724
Patent
active
041144473
ABSTRACT:
Temperature indicating apparatus having a sensor for introduction into a region having a temperature 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 responsive 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.
REFERENCES:
patent: 3576472 (1971-04-01), Marshall
patent: 3786485 (1974-01-01), Wojcik
patent: 3824581 (1974-07-01), Ohno
patent: 3851528 (1974-12-01), Nichols et al.
patent: 3877307 (1975-04-01), Georgi
Gill James J.
La Barge, Inc.
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