Thermal measuring and testing – Temperature measurement – By electrical or magnetic heat sensor
Patent
1980-06-04
1983-02-01
Yasich, Daniel M.
Thermal measuring and testing
Temperature measurement
By electrical or magnetic heat sensor
331 66, 374163, 374208, G01K 0722
Patent
active
043712711
ABSTRACT:
An electronic thermometer comprises a temperature sensitive resistance element to be placed in contact with the area of which the temperature is to be measured. A first relaxation oscillator to which the resistance element belongs, provides a frequency depending on the temperature to be measured. A reference oscillator provides a reference frequency. The first frequency is counted in a counter during a period provided from the reference frequency by a divider. If a temperature or power supply drift affects the reference frequency, the same drift affects in the same direction the counted frequency, so that during the counting the effect of the drift is substantially cancelled. A memory and a comparator record the result of the counting only if it is higher than the preceding result, so that the thermometer operates as a maximum thermometer. The recorded result is provided to a decoder which controls a display device.
REFERENCES:
patent: 2017859 (1935-10-01), Halstead
patent: 3100397 (1963-08-01), Peltola
patent: 3355949 (1967-12-01), Elwood et al.
patent: 3707873 (1973-01-01), Young
patent: 3715911 (1973-02-01), Chuan
patent: 3872728 (1975-03-01), Joyce et al.
patent: 3954007 (1976-05-01), Harrigan
patent: 4009615 (1977-03-01), Ruhl
patent: 4030363 (1977-06-01), Halleck
patent: 4110746 (1978-08-01), Furakawa et al.
patent: 4122719 (1978-10-01), Carlson
patent: 4125023 (1978-11-01), Amemiya et al.
patent: 4150573 (1979-04-01), Iinuma et al.
patent: 4206648 (1980-06-01), Tuska
Bioself International Inc.
Yasich Daniel M.
LandOfFree
Electronic thermometer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electronic thermometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic thermometer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2406182