PATENT OF THE WEEK – ELECTRONIC THERMOMETER

The ELECTRONIC THERMOMETER was invented by Michael E. Halleck (Boulder, CO) on the 21st of June, 1977 bearing patent number US4030363A.

The present invention is an improvised version of the electronic thermometer which provides accurate temperature readout. The said invention incorporates an analog to digital converter which utilizes pulse width modulation technique. A digital output reading in both the accuracy and temperature measurement is given. The electronic thermometer is sufficiently small in size because of which it is readily useable for the measurement of temperature readout. A pair of comparators are provided for the reference of digital readout to determine the accuracy monitoring along with which temperature measurement comparator for the desired temperature readout. To provide information to the digital readout display, the thermometer consists of an adjustable oscillator for triggering both a sawtooth generator and a decoder that gives the output.  The thermometer even has a hold-release circuit for precluding erroneous readings due to the premature release of an off-on switch. Accuracy calibration monitoring and easy temperature readout is was the primary objective of this invention.